{"title":"Astrographs","description":"\u003cp\u003eTelescopes designed specifically for astrophotography with no additional flattener\/reducer required. \u003c\/p\u003e","products":[{"product_id":"celestron-11-rasa-ota-only","title":"11\" RASA V2 OTA","description":"\u003cul\u003e\n\u003cli\u003eFast, wide-field 11” f\/2.2 optical design with rare-earth glass for images free of false color, coma, and field curvature\u003c\/li\u003e\n\u003cli\u003eLarge 43.3mm optimized image circle maintains pinpoint stars to the far corners of even the largest astroimaging sensors, while the usable field extends even further to 52mm for larger format sensors\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eNew Ultra-Stable Focus System (USFS) \u003c\/b\u003eminimizes focus shift and mirror flop\u003c\/li\u003e\n\u003cli\u003eIntegrated air-cooling system features a quiet, high-output 12V MagLev fan and vents with mesh filters to prevent dust ingress\u003c\/li\u003e\n\u003cli\u003eCommon camera adapters (T-thread and M48) included for easy attachment to popular CCD and DSLR cameras\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cbr\u003e\n\u003cdiv class=\"product-summary rte\"\u003e\n\u003cul\u003e\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"icon-list-wrap\"\u003e\n\u003ch5\u003eDescription\u003c\/h5\u003e\n\u003cp\u003eCapturing impressive deep-sky astroimages is easier than ever with Celestron’s Rowe-Ackermann Schmidt Astrograph (RASA) V2, the perfect companion to today’s top DSLR or astronomical CCD cameras. This fast, wide-field f\/2.2 system allows for shorter exposure times compared to traditional f\/10 astroimaging, without sacrificing resolution. Because shorter sub-exposure times are possible, your equatorial mount won’t need to accurately track over extended periods. The short focal length also lessens equatorial tracking demands. In many cases, autoguiding will not be required.\u003c\/p\u003e\n\u003cp\u003eRASA 11 V2 builds on the legacy of Celestron’s Schmidt Cameras, which allowed astrophotographers to produce images with much shorter exposure times on film in the 1970s.\u003c\/p\u003e\n\u003cp\u003eToday, with CCD sensor sizes as large as film or larger, the RASA 11 V2 offers a 43.3mm optimized image circle to capture pinpoint stars on the largest imaging chips. Optical performance for huge sensors with diagonals of up to 52mm wide is still excellent.\u003c\/p\u003e\n\u003cp\u003eCombine this large image circle with a focal length of just 620mm and you have an instrument suitable for wide-field imaging, creating huge mosaics of the night sky, surveying, and even comet hunting.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eOptical Performance\u003c\/strong\u003e\u003cstrong\u003e\u003cbr\u003e\u003c\/strong\u003eThe RASA 11 V2 features optics with 4-element rare-earth glass for images free of false color and aberrations like coma and field curvature. The optical quality and spot size across the entire image circle are unprecedented for an astrograph in this price range—or even that of a much more expensive instrument. The design also provides minimal vignetting.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eAdvanced Features\u003c\/strong\u003e\u003cstrong\u003e\u003cbr\u003e\u003c\/strong\u003eRASA 11 V2 utilizes the new Ultra-Stable Focus System (USFS). At the heart of this system is a precision linear ball bearing. The bearing serves to minimize focus shift (unwanted lateral motion of the primary mirror during focusing which causes shifting of the image) and mirror flop (movement of the primary mirror when the telescope is pointing to different positions in the sky). The USFS is also compatible with the optional Celestron Focus Motor (#94155-A). The integrated 12V DC MagLev fan reduces cooldown time and provides optimal airflow through the dust filtered optical tube.\u003c\/p\u003e\n\u003cp\u003eEngineered as a complete astroimaging system, every component of the RASA 11 V2 is optimized for peak performance with DSLR and astronomical CCD cameras. Down to the thickness of the glass used in the included fully-multicoated optical window or optional imaging filter, every component of the system has been taken into careful consideration to work together seamlessly. \u003cspan\u003eThe \u003c\/span\u003e\u003cspan\u003eDovetail CGE bars on the top of the optical tube provides a connection for use of optional accessories like a guidescope.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch5\u003eSpecifications\u003c\/h5\u003e\n\u003ctable class=\"table-open\" id=\"product-specs-list\"\u003e\n\u003ctbody id=\"spec-block-1\"\u003e\n\u003ctr\u003e\n\u003ctd\u003eOptical Design\u003c\/td\u003e\n\u003ctd\u003eRowe-Ackermann Schmidt Astrograph\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAperture\u003c\/td\u003e\n\u003ctd\u003e279mm (11\")\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocal Length\u003c\/td\u003e\n\u003ctd\u003e620mm (24.4\")\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocal Ratio\u003c\/td\u003e\n\u003ctd\u003ef\/2.2\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCentral obstruction diameter\u003c\/td\u003e\n\u003ctd\u003e114mm (4.48\") (41% of aperture diameter)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eLight Gathering Power (Compared to human eye)\u003c\/td\u003e\n\u003ctd\u003e1588x\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eResolution (Rayleigh)\u003c\/td\u003e\n\u003ctd\u003e0.49 arc seconds\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eResolution (Dawes)\u003c\/td\u003e\n\u003ctd\u003e0.41 arc seconds\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eImage Circle\u003c\/td\u003e\n\u003ctd\u003e43.3mm (1.7\") Ø , 4.0°\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eUseable field\u003c\/td\u003e\n\u003ctd\u003e52mm (2.04\") Ø , 4.8° only minimal performance loss at edge of FOV\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWavelength range\u003c\/td\u003e\n\u003ctd\u003e400 - 700 nm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSpot size\u003c\/td\u003e\n\u003ctd\u003e\u0026lt; 4.4 μm RMS across FOV\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOptical Coatings\u003c\/td\u003e\n\u003ctd\u003eStarBright XLT\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOff-axis Illumination\u003c\/td\u003e\n\u003ctd\u003e83% at 21mm (.82\") off-axis\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOptical Window\u003c\/td\u003e\n\u003ctd\u003e68mm (2.67\") Ø\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBack focus with included camera adapter\u003c\/td\u003e\n\u003ctd\u003e55mm (2.16\")\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBack focus from top of threaded collar\u003c\/td\u003e\n\u003ctd\u003e72.8mm (2.86\")\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOptical Tube\u003c\/td\u003e\n\u003ctd\u003eAluminum\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOptical Tube Length\u003c\/td\u003e\n\u003ctd\u003e838.2mm (33\")\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOptical Tube Diameter\u003c\/td\u003e\n\u003ctd\u003e330.2mm (13\")\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocuser\u003c\/td\u003e\n\u003ctd\u003eUltra-Stable Focus System\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFinderscope\u003c\/td\u003e\n\u003ctd\u003eNot included\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOptical Tube Weight\u003c\/td\u003e\n\u003ctd\u003e43 lbs (19.5 kg)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOther Features\u003c\/td\u003e\n\u003ctd\u003eVentilation fan, dual dovetail mounting bars\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eIncluded items\u003c\/td\u003e\n\u003ctd\u003e42mm (1.65\") T-thread camera adapter | 48mm (1.89\") camera adapter | Dust cover | Fan battery pack\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDovetail\u003c\/td\u003e\n\u003ctd\u003eCGE Dovetail Bar\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cbr\u003e\n\u003c\/div\u003e","brand":"Celestron","offers":[{"title":"Default Title","offer_id":3737406406696,"sku":"91076","price":4499.0,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/products\/91076_Rowe-Ackermann_Schmidt_Astrograph_v2_01_570x380_3x_b107cce4-1ef6-431f-bc49-902bd8ae346e.jpg?v=1739319892"},{"product_id":"celestron-edgehd-800-ota-cge","title":"EdgeHD 800 OTA","description":"\u003cp\u003e \u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eExperience our best optical performance with EdgeHD’s aplanatic, flat field Schmidt-Cassegrain optics for pinpoint stars all the way to the edge of today’s largest imaging sensors and widest eyepieces.\u003c\/li\u003e\n\u003cli\u003eAluminum optical tube with tube vents featuring an integrated 95-micron mesh filter allows hot air to be released from behind the primary mirror. Mirror support knobs hold the mirror in place and reduce image shift during imaging.\u003c\/li\u003e\n\u003cli\u003eVersatile design accommodates 3 focal ratios: native f\/10, f\/7 with the addition of a focal reducer, or ultra-fast f\/2 imaging with a removable secondary mirror and third-party accessories.\u003c\/li\u003e\n\u003cli\u003eCelestron’s premium StarBright XLT coatings provide maximum light transmission.\u003c\/li\u003e\n\u003cli\u003eA 9x50 finderscope, 1.25” mirror diagonal for more comfortable viewing, and 40 mm Plössl 1.25” eyepiece are all included.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eSee the Universe in HD\u003c\/strong\u003e\u003cbr\u003eEdgeHD is an aplanatic, flat field Schmidt-Cassegrain telescope that produces aberration-free images across a wide visual and photographic field of view. The optical system was designed to reduce more than just off-axis star coma; it also provides an astrograph-quality flat focal plane all the way to the edge of the field of view.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eTrue Astrograph Quality\u003c\/strong\u003e\u003cbr\u003eMany optical designs that advertise themselves as \"astrographs\" actually only produce pinpoint stars across a curved focal plane. While this may be acceptable for some visual observing, stars will appear out of focus at the edge when used with the flat chip sensor of a digital camera. EdgeHD optics produce a focal plane more than three-times flatter than a standard Schmidt-Cassegrain telescope and dramatically flatter than competing coma-free designs. This guarantees you visibly sharp stars across some of the largest CCD chips available today.\u003cspan\u003e \u003c\/span\u003eLearn more about EdgeHD technology.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eImproved Performance\u003c\/strong\u003e\u003cbr\u003eSuperior edge performance not only creates rounder, more pleasing stars, but actually improves the resolution and limiting magnitude when compared to telescopes of equal aperture. With Celestron’s StarBright XLT optical coatings on every surface, EdgeHD optics gives you maximum light throughput across the widest visual and photographic spectrum.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eMechanical Features\u003cbr\u003e\u003c\/strong\u003eIn addition to EdgeHD’s optimized optical design, the telescope tube has been redesigned to make sure you get the most from your optics each and every night.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMirror clutches\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e- Flexible tension clutches hold the mirror in place and reduce image shift when taking long exposure astro-images. Once focused, the flexible rods allow the mirror to be held in place without putting any force or pressure on the mirror assembly, keeping the image centered in the eyepiece (or on the sensor).\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTube vents\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e- Cooling vents located on the rear cell allow hot air to be released from behind the primary mirror. Each vent has an integrated 95-micron micromesh filter guaranteed to let warm air out without letting dust in.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFastar versatility\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e- EdgeHD is the most versatile imaging telescope available today. At its native f\/10, you can achieve the image scale necessary to capture the smallest of deep sky objects. Add the optional reducer lens—custom-designed for your size EdgeHD tube—and you can increase your field of view without sacrificing optical performance. A Barlow gives you added power for high-resolution planetary, lunar and solar imaging. All EdgeHD optical tubes are Fastar-compatible, allowing the secondary mirror to be removed and replaced with a third party lens accessory for ultra-fast f\/2 wide field imaging.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eIndividually Tested\u003c\/strong\u003e\u003cbr\u003eEvery EdgeHD that ships has been tested not only for the surface quality of each optical component, but also with a camera and artificial star to ensure the imaging system meets our rigid quality assurance. This “final acceptance test” confirms the EdgeHD will perform in the field and deliver high-quality astroimages.\u003c\/p\u003e\n\u003ch2\u003eSpecifications\u003c\/h2\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ctable class=\"table-open\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eAperture (mm)\u003c\/td\u003e\n\u003ctd\u003e203.2 mm (8 in)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDovetail Compatibility\u003c\/td\u003e\n\u003ctd\u003eCGE Mount\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFinderscope\u003c\/td\u003e\n\u003ctd\u003e9x50\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocal Length\u003c\/td\u003e\n\u003ctd\u003e2032 mm (80 in)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocal Length of Eyepiece 1 ...\u003c\/td\u003e\n\u003ctd\u003e40 mm (1.57 in)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocal Ratio\u003c\/td\u003e\n\u003ctd\u003e10\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHighest Useful Magnification\u003c\/td\u003e\n\u003ctd\u003e480 x\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eLight Gathering Power (Comp...\u003c\/td\u003e\n\u003ctd\u003e843 x\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eLimiting Stellar Magnitude\u003c\/td\u003e\n\u003ctd\u003e14\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eLowest Useful Magnification\u003c\/td\u003e\n\u003ctd\u003e29 x\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMagnification of Eyepiece 1\u003c\/td\u003e\n\u003ctd\u003e51 x\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOptical Coatings\u003c\/td\u003e\n\u003ctd\u003eStarBright XLT\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOptical Design\u003c\/td\u003e\n\u003ctd\u003eEdgeHD\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOptical Tube\u003c\/td\u003e\n\u003ctd\u003eAluminum\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOptical Tube Length\u003c\/td\u003e\n\u003ctd\u003e17 in (432 mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOptical Tube Weight\u003c\/td\u003e\n\u003ctd\u003e14 lbs (6.35 kg)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eResolution (Dawes)\u003c\/td\u003e\n\u003ctd\u003e0.57 arc seconds\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eResolution (Rayleigh)\u003c\/td\u003e\n\u003ctd\u003e0.69 arc seconds\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSecondary Mirror Obstructio...\u003c\/td\u003e\n\u003ctd\u003e11%\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSecondary Mirror Obstruction\u003c\/td\u003e\n\u003ctd\u003e2.7 in (69 mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStar Diagonal\u003c\/td\u003e\n\u003ctd\u003e1.25\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e","brand":"Celestron","offers":[{"title":"Default Title","offer_id":3737409617960,"sku":"91030-XLT","price":1699.0,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/products\/91030-xlt_edgehd8_large_1_570x380_2x_605308f5-2cc1-4362-a6f4-34e9284c791a.jpg?v=1519018285"},{"product_id":"celestron-edgehd-925-ota-cge","title":"EdgeHD 925 OTA","description":"\u003ch5\u003e\n\u003cspan style=\"color: #ff2a00;\"\u003e\u003c\/span\u003eOverview\u003c\/h5\u003e\n\u003cul\u003e\n\u003cli\u003eExperience our best optical performance with EdgeHD’s aplanatic, flat field Schmidt-Cassegrain optics for pinpoint stars all the way to the edge of today’s largest imaging sensors and widest eyepieces\u003c\/li\u003e\n\u003cli\u003eAluminum optical tube with tube vents featuring an integrated 95-micron mesh filter allows hot air to be released from behind the primary mirror. Mirror support knobs hold the mirror in place and reduce image shift during imaging\u003c\/li\u003e\n\u003cli\u003eVersatile design accommodates 2 focal ratios: native f\/10 or ultra-fast f\/2 imaging with a removable secondary mirror and third-party accessories\u003c\/li\u003e\n\u003cli\u003eCelestron’s premium StarBright XLT coatings provide maximum light transmission\u003c\/li\u003e\n\u003cli\u003eA 9x50 finderscope, 2” mirror diagonal for more comfortable viewing, and wide-angle 23 mm Luminos 2\" eyepiece are all included\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cmeta charset=\"utf-8\"\u003e\n\u003cp\u003e\u003cstrong\u003e\u003ciframe src=\"https:\/\/www.youtube.com\/embed\/77dLKd5g2_M\" height=\"315\" width=\"560\" allowfullscreen=\"\" allow=\"autoplay; encrypted-media\" frameborder=\"0\"\u003e\u003c\/iframe\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003ch5\u003e\u003cstrong\u003eFeatures\u003c\/strong\u003e\u003c\/h5\u003e\n\u003cp\u003e\u003cstrong\u003eSee the Universe in HD\u003c\/strong\u003e\u003cbr\u003eEdgeHD is an aplanatic, flat field Schmidt-Cassegrain telescope that produces aberration-free images across a wide visual and photographic field of view. The optical system was designed to reduce more than just off-axis star coma; it also provides an astrograph-quality flat focal plane all the way to the edge of the field of view.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eTrue Astrograph Quality\u003c\/strong\u003e\u003cbr\u003eMany optical designs that advertise themselves as \"astrographs\" actually only produce pinpoint stars across a curved focal plane. While this may be acceptable for some visual observing, stars will appear out of focus at the edge when used with the flat chip sensor of a digital camera. EdgeHD optics produce a focal plane more than three-times flatter than a standard Schmidt-Cassegrain telescope and dramatically flatter than competing coma-free designs. This guarantees you visibly sharp stars across some of the largest CCD chips available today. \u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eMechanical Features\u003c\/strong\u003e\u003cbr\u003eIn addition to EdgeHD’s optimized optical design, the telescope tube has been redesigned to make sure you get the most from your optics each and every night.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMirror clutches\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e- Flexible tension clutches hold the mirror in place and reduce image shift when taking long exposure astro-images. Once focused, the flexible rods allow the mirror to be held in place without putting any force or pressure on the mirror assembly, keeping the image centered in the eyepiece (or on the sensor).\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTube vents\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e- Cooling vents located on the rear cell allow hot air to be released from behind the primary mirror. Each vent has an integrated 95-micron micromesh filter guaranteed to let warm air out without letting dust in.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFastar versatility\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e- EdgeHD is the most versatile imaging telescope available today. At its native f\/10, you can achieve the image scale necessary to capture the smallest of deep sky objects. A Barlow gives you added power for high-resolution planetary, lunar and solar imaging. All EdgeHD optical tubes are Fastar-compatible, allowing the secondary mirror to be removed and replaced with a third party lens accessory for ultra-fast f\/2 wide field imaging.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eIndividually Tested\u003c\/strong\u003e\u003cbr\u003eEvery EdgeHD that ships has been tested not only for the surface quality of each optical component, but also with a camera and artificial star to ensure the imaging system meets our rigid quality assurance. This “final acceptance test” confirms the EdgeHD will perform in the field and deliver high-quality astroimages.\u003c\/p\u003e\n\u003ch5\u003eSpecifications\u003c\/h5\u003e\n\u003cmeta charset=\"utf-8\"\u003e\n\u003ctable class=\"table-open\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eAperture (mm)\u003c\/td\u003e\n\u003ctd\u003e234.95 mm (9.25 in)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDovetail Compatibility\u003c\/td\u003e\n\u003ctd\u003eCGE Mount\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFinderscope\u003c\/td\u003e\n\u003ctd\u003e9x50\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocal Length\u003c\/td\u003e\n\u003ctd\u003e2350 mm (93 in)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocal Length of Eyepiece 1 ...\u003c\/td\u003e\n\u003ctd\u003e23 mm (0.91 in)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocal Ratio\u003c\/td\u003e\n\u003ctd\u003e10\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHighest Useful Magnification\u003c\/td\u003e\n\u003ctd\u003e555 x\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eLight Gathering Power (Comp...\u003c\/td\u003e\n\u003ctd\u003e1127 x\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eLimiting Stellar Magnitude\u003c\/td\u003e\n\u003ctd\u003e14.4\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eLowest Useful Magnification\u003c\/td\u003e\n\u003ctd\u003e34 x\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMagnification of Eyepiece 1\u003c\/td\u003e\n\u003ctd\u003e102 x\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOptical Coatings\u003c\/td\u003e\n\u003ctd\u003eStarBright XLT\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOptical Design\u003c\/td\u003e\n\u003ctd\u003eEdgeHD\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOptical Tube\u003c\/td\u003e\n\u003ctd\u003eAluminum\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOptical Tube Length\u003c\/td\u003e\n\u003ctd\u003e22 in (559 mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOptical Tube Weight\u003c\/td\u003e\n\u003ctd\u003e21 lbs (9.53 kg)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eResolution (Dawes)\u003c\/td\u003e\n\u003ctd\u003e0.49 arc seconds\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eResolution (Rayleigh)\u003c\/td\u003e\n\u003ctd\u003e0.59 arc seconds\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSecondary Mirror Obstructio...\u003c\/td\u003e\n\u003ctd\u003e13%\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSecondary Mirror Obstruction\u003c\/td\u003e\n\u003ctd\u003e3.35 in (85 mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStar Diagonal\u003c\/td\u003e\n\u003ctd\u003e2\" w\/ 1.25\" adapter\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e","brand":"Celestron","offers":[{"title":"Default Title","offer_id":3737409683496,"sku":"91040-XLT","price":3099.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/products\/91040-xlt_cge_pro_925_hd_1_570x380_2x_722cba9a-ce18-4c31-90c3-314e09e8e272.jpg?v=1753826835"},{"product_id":"celestron-edgehd-1100-ota-cge","title":"EdgeHD 1100 OTA","description":"\u003cmeta charset=\"utf-8\"\u003e\n\u003cul\u003e\n\u003cli\u003eExperience our best optical performance with EdgeHD’s aplanatic, flat field Schmidt-Cassegrain optics for pinpoint stars all the way to the edge of today’s largest imaging sensors and widest eyepieces\u003c\/li\u003e\n\u003cli\u003eAluminum optical tube with tube vents featuring an integrated 95-micron mesh filter allows hot air to be released from behind the primary mirror. Mirror support knobs hold the mirror in place and reduce image shift during imaging\u003c\/li\u003e\n\u003cli\u003eVersatile design accommodates 3 focal ratios: native f\/10, f\/7 with the addition of a focal reducer, or ultra-fast f\/2 imaging with a removable secondary mirror and third-party accessories\u003c\/li\u003e\n\u003cli\u003eCelestron’s premium StarBright XLT coatings provide maximum light transmission.\u003c\/li\u003e\n\u003cli\u003eA 9x50 finderscope, 2” mirror diagonal for more comfortable viewing, and wide-angle 23 mm Luminos 2\" eyepiece are all included\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cmeta charset=\"utf-8\"\u003e\n\u003cp\u003e\u003cstrong\u003eSee the Universe in HD\u003c\/strong\u003e\u003cbr\u003eEdgeHD is an aplanatic, flat field Schmidt-Cassegrain telescope that produces aberration-free images across a wide visual and photographic field of view. The optical system was designed to reduce more than just off-axis star coma; it also provides an astrograph-quality flat focal plane all the way to the edge of the field of view.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eTrue Astrograph Quality\u003c\/strong\u003e\u003cbr\u003eMany optical designs that advertise themselves as \"astrographs\" actually only produce pinpoint stars across a curved focal plane. While this may be acceptable for some visual observing, stars will appear out of focus at the edge when used with the flat chip sensor of a digital camera. EdgeHD optics produce a focal plane more than three-times flatter than a standard Schmidt-Cassegrain telescope and dramatically flatter than competing coma-free designs. This guarantees you visibly sharp stars across some of the largest CCD chips available today. \u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eImproved Performance\u003c\/strong\u003e\u003cbr\u003eSuperior edge performance not only creates rounder, more pleasing stars, but actually improves the resolution and limiting magnitude when compared to telescopes of equal aperture. With Celestron’s StarBright XLT optical coatings on every surface, EdgeHD optics gives you maximum light throughput across the widest visual and photographic spectrum.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eMechanical Features\u003cbr\u003e\u003c\/strong\u003eIn addition to EdgeHD’s optimized optical design, the telescope tube has been redesigned to make sure you get the most from your optics each and every night.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMirror clutches\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e- Flexible tension clutches hold the mirror in place and reduce image shift when taking long exposure astro-images. Once focused, the flexible rods allow the mirror to be held in place without putting any force or pressure on the mirror assembly, keeping the image centered in the eyepiece (or on the sensor).\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTube vents\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e- Cooling vents located on the rear cell allow hot air to be released from behind the primary mirror. Each vent has an integrated 95-micron micromesh filter guaranteed to let warm air out without letting dust in.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFastar versatility\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e- EdgeHD is the most versatile imaging telescope available today. At its native f\/10, you can achieve the image scale necessary to capture the smallest of deep sky objects. Add the optional reducer lens—custom-designed for your size EdgeHD tube—and you can increase your field of view without sacrificing optical performance. A Barlow gives you added power for high-resolution planetary, lunar and solar imaging. All EdgeHD optical tubes are Fastar-compatible, allowing the secondary mirror to be removed and replaced with a third party lens accessory for ultra-fast f\/2 wide field imaging.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eIndividually Tested\u003c\/strong\u003e\u003cbr\u003eEvery EdgeHD that ships has been tested not only for the surface quality of each optical component, but also with a camera and artificial star to ensure the imaging system meets our rigid quality assurance. 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Mirror support knobs hold the mirror in place and reduce image shift during imaging\u003c\/li\u003e\n\u003cli\u003eVersatile design accommodates 3 focal ratios: native f\/10, f\/7 with the addition of a focal reducer, or ultra-fast f\/2 imaging with a removable secondary mirror and third-party accessories\u003c\/li\u003e\n\u003cli\u003eCelestron’s premium StarBright XLT coatings provide maximum light transmission\u003c\/li\u003e\n\u003cli\u003eA 9x50 finderscope, 2” mirror diagonal for more comfortable viewing, and wide-angle 23 mm Luminos 2\" eyepiece are all included\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cmeta charset=\"utf-8\"\u003e\n\u003cp\u003e\u003cstrong\u003e\u003ciframe width=\"560\" height=\"315\" src=\"https:\/\/www.youtube.com\/embed\/77dLKd5g2_M\" frameborder=\"0\" allow=\"autoplay; encrypted-media\" allowfullscreen=\"\"\u003e\u003c\/iframe\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eSee the Universe in HD\u003c\/strong\u003e\u003cbr\u003eEdgeHD is an aplanatic, flat field Schmidt-Cassegrain telescope that produces aberration-free images across a wide visual and photographic field of view. The optical system was designed to reduce more than just off-axis star coma; it also provides an astrograph-quality flat focal plane all the way to the edge of the field of view.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eTrue Astrograph Quality\u003c\/strong\u003e\u003cbr\u003eMany optical designs that advertise themselves as \"astrographs\" actually only produce pinpoint stars across a curved focal plane. While this may be acceptable for some visual observing, stars will appear out of focus at the edge when used with the flat chip sensor of a digital camera. EdgeHD optics produce a focal plane more than three-times flatter than a standard Schmidt-Cassegrain telescope and dramatically flatter than competing coma-free designs. This guarantees you visibly sharp stars across some of the largest CCD chips available today. \u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eImproved Performance\u003c\/strong\u003e\u003cbr\u003eSuperior edge performance not only creates rounder, more pleasing stars, but actually improves the resolution and limiting magnitude when compared to telescopes of equal aperture. With Celestron’s StarBright XLT optical coatings on every surface, EdgeHD optics gives you maximum light throughput across the widest visual and photographic spectrum.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eMechanical Features\u003cbr\u003e\u003c\/strong\u003eIn addition to EdgeHD’s optimized optical design, the telescope tube has been redesigned to make sure you get the most from your optics each and every night.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMirror clutches\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e- Flexible tension clutches hold the mirror in place and reduce image shift when taking long exposure astro-images. Once focused, the flexible rods allow the mirror to be held in place without putting any force or pressure on the mirror assembly, keeping the image centered in the eyepiece (or on the sensor).\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTube vents\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e- Cooling vents located on the rear cell allow hot air to be released from behind the primary mirror. Each vent has an integrated 95-micron micromesh filter guaranteed to let warm air out without letting dust in.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFastar versatility\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e- EdgeHD is the most versatile imaging telescope available today. At its native f\/10, you can achieve the image scale necessary to capture the smallest of deep sky objects. Add the optional reducer lens—custom-designed for your size EdgeHD tube—and you can increase your field of view without sacrificing optical performance. A Barlow gives you added power for high-resolution planetary, lunar and solar imaging. All EdgeHD optical tubes are Fastar-compatible, allowing the secondary mirror to be removed and replaced with a third party lens accessory for ultra-fast f\/2 wide field imaging.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eIndividually Tested\u003c\/strong\u003e\u003cbr\u003eEvery EdgeHD that ships has been tested not only for the surface quality of each optical component, but also with a camera and artificial star to ensure the imaging system meets our rigid quality assurance. This “final acceptance test” confirms the EdgeHD will perform in the field and deliver high-quality astroimages.\u003c\/p\u003e\n\u003ch2\u003eSpecifications\u003c\/h2\u003e\n\u003cmeta charset=\"utf-8\"\u003e\n\u003ctable class=\"table-open\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eAperture (mm)\u003c\/td\u003e\n\u003ctd\u003e355.6 mm (14 in)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDovetail Compatibility\u003c\/td\u003e\n\u003ctd\u003eCGE Mount\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFinderscope\u003c\/td\u003e\n\u003ctd\u003e9x50\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocal Length\u003c\/td\u003e\n\u003ctd\u003e3910 mm (154 in)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocal Length of Eyepiece 1 ...\u003c\/td\u003e\n\u003ctd\u003e23 mm (0.91 in)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocal Ratio\u003c\/td\u003e\n\u003ctd\u003e11\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHighest Useful Magnification\u003c\/td\u003e\n\u003ctd\u003e840 x\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eLight Gathering Power (Comp...\u003c\/td\u003e\n\u003ctd\u003e2581 x\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eLimiting Stellar Magnitude\u003c\/td\u003e\n\u003ctd\u003e15.3\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eLowest Useful Magnification\u003c\/td\u003e\n\u003ctd\u003e51 x\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMagnification of Eyepiece 1\u003c\/td\u003e\n\u003ctd\u003e170 x\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOptical Coatings\u003c\/td\u003e\n\u003ctd\u003eStarBright \/ XLT\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOptical Design\u003c\/td\u003e\n\u003ctd\u003eEdgeHD\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOptical Tube\u003c\/td\u003e\n\u003ctd\u003eAluminum\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOptical Tube Length\u003c\/td\u003e\n\u003ctd\u003e31 in (787 mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOptical Tube Weight\u003c\/td\u003e\n\u003ctd\u003e46 lbs (21 kg)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eResolution (Dawes)\u003c\/td\u003e\n\u003ctd\u003e0.33 arc seconds\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eResolution (Rayleigh)\u003c\/td\u003e\n\u003ctd\u003e0.39 arc seconds\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSecondary Mirror Obstructio...\u003c\/td\u003e\n\u003ctd\u003e10%\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSecondary Mirror Obstruction\u003c\/td\u003e\n\u003ctd\u003e4.5 in (114 mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStar Diagonal\u003c\/td\u003e\n\u003ctd\u003e2\" w\/1.25\" adapter\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e","brand":"Celestron","offers":[{"title":"Default Title","offer_id":3737409749032,"sku":"91060-XLT","price":7699.0,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/products\/91060-xlt_cge_pro_1400_hd_1_570x380_2x_807a167a-c558-44a5-b53e-8ed53fb0c74d.jpg?v=1519017972"},{"product_id":"celestron-8-rasa-ota-only","title":"8\" RASA - OTA Only","description":"\u003cp\u003e\u003cmeta charset=\"utf-8\"\u003e\u003cem\u003e\u003cstrong\u003eThe RASA is an advanced astrograph designed for experienced imagers. Do not select a RASA as your first astrophotography telescope!\u003c\/strong\u003e\u003c\/em\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eFlat field free of optical aberrations like field curvature, coma, astigmatism and chromatic aberration across an entire APS-C sensor.\u003c\/li\u003e\n\u003cli\u003eNEW Ultra-Stable Focus System – six precision sealed ball bearings virtually eliminate image shift.\u003c\/li\u003e\n\u003cli\u003eIntegrated air cooling system –12V DC MagLev fan reduces cooldown time and provides optimal air flow while filtering out dust.\u003c\/li\u003e\n\u003cli\u003eInternal filter mount – seamlessly accommodates a Light Pollution Imaging Filter into the optical path.\u003c\/li\u003e\n\u003cli\u003eCGE dovetail mounting rail.\u003c\/li\u003e\n\u003cli\u003ePerforms over a wider spectral range than most telescopes, from 390-800 nm, so more of the light passing through the astrograph is in sharp focus.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch5\u003eDescription\u003c\/h5\u003e\n\u003cp\u003eCapture spectacular wide-field deep sky images in seconds with Celestron’s new portable astrograph, the 8” Rowe-Ackermann Schmidt Astrograph (RASA). This incredibly fast f\/2.0 system is the perfect companion to today’s color astronomical CMOS cameras, smaller CCD cameras, and mirrorless cameras. Thanks to its fast focal ratio and patented optical design, you can produce sharp, detailed images and, in many cases, skip the autoguider completely. Weighing in at just 17 pounds, it’s easy to transport your 8” RASA to the most remote dark sky locations.\u003cstrong\u003e \u003c\/strong\u003e\u003c\/p\u003e\n\u003cdiv class=\"product-summary rte\"\u003e\n\u003cp\u003e\u003cstrong\u003eRASA Performance Made for Everyone\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe 8” RASA is an imaging telescope that delivers a flat field without optical aberrations for razor sharp stars across a wide field of view. It can capture stunning deep-sky astronomical images without the challenges typically presented by longer focal length instruments at a fraction of the cost of those systems.\u003c\/p\u003e\n\u003cp\u003ePurely designed for imaging, the 8” RASA cannot be used visually. The prime focus focal plane is located at the front of the optical system, so it cannot accommodate a traditional eyepiece.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eShorter Exposure Times and Virtual “Real-Time” Observing\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eSince it is an F\/2.0 optical system, imagers can use shorter exposure times to capture detail in faint objects. When combined with sensitive cameras and the proper “live stacking” software, the 8” RASA can provide an almost real-time observing experience. View images on a computer instantly that are brighter and more detailed than can be seen in much bigger telescopes with the naked eye.\u003c\/p\u003e\n\u003cp\u003eBecause shorter exposure times are possible, your equatorial mount won’t need to accurately track over extended periods. The 8” RASA’s relatively short 400mm focal length also lessens equatorial tracking demands. In many cases, autoguiding will not be required. Weighing only 17 lb, this optical tube pairs perfectly with a wide variety of mounts.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eBuilt for Today’s Latest Cameras\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eUnlike the larger RASAs that work with DSLR and large CCD cameras, the 8” model was designed with color astronomical CMOS cameras, smaller CCD cameras, and mirrorless cameras in mind. It is optimized for sensors with up to a 22mm diagonal, but still performs well with larger (up to 32mm diagonal) sensors. As such, it works well with APS-C sized sensors used in many mirrorless cameras.\u003c\/p\u003e\n\u003cp\u003eCamera adapters to connect C-mount cameras and cameras which mount with M42 threads are included. Celestron offers optional adapters to connect your 8” RASA to Sony or Canon mirrorless cameras.\u003c\/p\u003e\n\u003ch5\u003eSpecifications\u003c\/h5\u003e\n\u003ctable id=\"product-specs-list\" class=\"table-open\"\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eOPTICAL TUBE INFO:\u003c\/th\u003e\n\u003cth\u003e\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody id=\"spec-block-1\"\u003e\n\u003ctr\u003e\n\u003ctd\u003eOptical Design\u003c\/td\u003e\n\u003ctd\u003eRowe-Ackermann Schmidt Astrograph\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAperture\u003c\/td\u003e\n\u003ctd\u003e203 mm (8\")\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocal Length\u003c\/td\u003e\n\u003ctd\u003e400 mm (15.74\")\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocal Ratio\u003c\/td\u003e\n\u003ctd\u003ef\/2.0\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCentral obstruction diameter\u003c\/td\u003e\n\u003ctd\u003e93 mm (3.66\") (46% of aperture diameter)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eLight Gathering Power (Compared to human eye)\u003c\/td\u003e\n\u003ctd\u003e843x\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eResolution (Rayleigh)\u003c\/td\u003e\n\u003ctd\u003e0.68 arc seconds\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eResolution (Dawes)\u003c\/td\u003e\n\u003ctd\u003e0.57 arc seconds\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eImage Circle\u003c\/td\u003e\n\u003ctd\u003e22 mm (.86\") Ø, 3.15°\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eUseable field\u003c\/td\u003e\n\u003ctd\u003e32 mm (1.26\") Ø, 4.6°, only minimal performance loss at edge of FOV\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWavelength range\u003c\/td\u003e\n\u003ctd\u003e390 - 800 nm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSpot size\u003c\/td\u003e\n\u003ctd\u003e\u0026lt; 4.6 μm RMS across image circle\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOptical Coatings\u003c\/td\u003e\n\u003ctd\u003eStarBright XLT\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOff-axis Illumination\u003c\/td\u003e\n\u003ctd\u003e93% at 11 mm (.43\") off-axis\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOptical Window\u003c\/td\u003e\n\u003ctd\u003e46 mm (1.81\") Ø\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBack focus with included camera adapter\u003c\/td\u003e\n\u003ctd\u003e25 mm (.98\")\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBack focus from top of threaded collar\u003c\/td\u003e\n\u003ctd\u003e29 mm (1.14\")\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOptical Tube\u003c\/td\u003e\n\u003ctd\u003eAluminum\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOptical Tube Length\u003c\/td\u003e\n\u003ctd\u003e628 mm (24.7\") length, 235 mm (9.3\") diameter\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocuser\u003c\/td\u003e\n\u003ctd\u003eUltra-Stable Focusing System\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFinderscope\u003c\/td\u003e\n\u003ctd\u003eNot included\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOptical Tube Weight\u003c\/td\u003e\n\u003ctd\u003e17 lbs (7.7 kg)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOther Features\u003c\/td\u003e\n\u003ctd\u003eAir-cooling system, integrated filter mount\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eIncluded items\u003c\/td\u003e\n\u003ctd\u003eM42 camera adapter, C-thread camera adapter, fan battery pack\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDovetail\u003c\/td\u003e\n\u003ctd\u003eCGE Dovetail Bar\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e","brand":"Celestron","offers":[{"title":"Default Title","offer_id":12465789239389,"sku":"91073","price":2199.0,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/products\/91073_8in_Rowe-Ackermann_Schmidt_Astrograph_01.jpg?v=1780636418"},{"product_id":"celestron-36cm-14-rasa-ota-only","title":"36cm (14\") RASA - OTA Only","description":"\u003cp\u003e\u003cstrong\u003eSPECIAL ORDER\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThese instruments are special order only - please contact us for availability.\u003c\/p\u003e\n\u003cdiv class=\"product-summary rte\"\u003e\n\u003cul\u003e\n\u003cli\u003eA breakthrough 36 cm aperture, f\/2.2 optical system designed for professional applications that require both a wide field of view and resolution, such as space surveillance and other scientific applications\u003c\/li\u003e\n\u003cli\u003e4-element lens group utilizes extra-low dispersion (ED) glass for images free of false color, coma, and field curvature, the Rowe-Ackermann Schmidt Astrograph (RASA) 36 cm is also an excellent choice for advanced astroimaging\u003c\/li\u003e\n\u003cli\u003e60 mm optimized image circle maintains pinpoint stars to the far corners of the largest available sensors\u003c\/li\u003e\n\u003cli\u003eExtended spectral range takes advantage of sensor response in the 700-900 nm range, allowing a brighter overall signal to be detected\u003c\/li\u003e\n\u003cli\u003eRedesigned focusing system minimizes focus shifting or other unwanted motion of the primary mirror, enabling easy and stable focus\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"icon-list-wrap\"\u003e\n\u003ch5\u003eDescription\u003c\/h5\u003e\n\u003cp\u003eThe Rowe-Ackermann Schmidt Astrograph (RASA), is a cost-effective optical system for space surveillance, Space Situational Awareness (SSA), other scientific applications, and advanced wide field astroimaging. It offers unprecedented value in aperture, speed, field of view, and optical performance. The RASA design has a convenient external prime-focus image capture location with a flat focal plane, providing small spot sizes to the edge of a wide field. The result is images free of optical defects like field curvature, off-axis coma, and astigmatism.\u003c\/p\u003e\n\u003cp\u003eThe 36 cm aperture version is the largest RASA Celestron manufactures; it is the biggest and fastest (f\/2.2) optical instrument of its kind available “off-the-shelf.” Unlike most telescopes, which only focus visible light (400-700 nm), the RASA 36 cm focuses an extended spectral range (400-900 nm), allowing a brighter signal to be detected by a camera sensor. The RASA 36 cm also features a redesigned focus system, which ensures easy and stable focusing.\u003c\/p\u003e\n\u003cp\u003eRASA 36 cm’s ample back-focus distance (77.5 mm) accommodates a wide variety of imaging sensors. A custom camera adapter can be added for a field of view up to 4.4 degrees.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eOptical Performance\u003cbr\u003e\u003c\/strong\u003eThe Rowe-Ackermann Schmidt Astrograph features newly designed optics with 4-element rare-earth glass for images free of false color and aberrations like coma and field curvature. The optical quality and spot size across the entire image circle is unprecedented for an astrograph in this price range—or even that of a much more expensive instrument. The design also provides minimal vignetting.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eAdvanced Features\u003cbr\u003e\u003c\/strong\u003eAdvanced features like a custom engineered linear brass focuser bearing and FeatherTouch Micro Focus Knob allow you to make the fine adjustments you need to capture the perfect shot. Meanwhile, a12V MagLev fan reduces cooldown time and provides optimal airflow through the dust filtered optical tube.\u003c\/p\u003e\n\u003cp\u003eEngineered as a complete astroimaging system, every component of the Rowe-Ackermann Schmidt Astrograph is optimized for peak performance with DSLR and astronomical CCD cameras. Down to the thickness of the glass used in the included fully-multicoated optical window or an optional imaging filter, every component of the system has been taken into careful consideration to work together seamlessly.\u003c\/p\u003e\n\u003ch5\u003eSpecifications\u003c\/h5\u003e\n\u003ctable id=\"product-specs-list\" class=\"table-open\"\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eOPTICAL TUBE INFO:\u003c\/th\u003e\n\u003cth\u003e\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody id=\"spec-block-1\"\u003e\n\u003ctr\u003e\n\u003ctd\u003eOptical Design\u003c\/td\u003e\n\u003ctd\u003eRowe-Ackermann Schmidt Astrograph\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAperture\u003c\/td\u003e\n\u003ctd\u003e355.6 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocal Length\u003c\/td\u003e\n\u003ctd\u003e790 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocal Ratio\u003c\/td\u003e\n\u003ctd\u003ef\/2.2\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCentral obstruction diameter\u003c\/td\u003e\n\u003ctd\u003e158 mm (44% of aperture diameter)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eLight Gathering Power (Compared to human eye)\u003c\/td\u003e\n\u003ctd\u003e2581X\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eResolution (Rayleigh)\u003c\/td\u003e\n\u003ctd\u003e0.39 arc seconds\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eResolution (Dawes)\u003c\/td\u003e\n\u003ctd\u003e0.36 arc seconds\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eImage circle\u003c\/td\u003e\n\u003ctd\u003e60.1 mm Ø, 4.4°\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eUseable field\u003c\/td\u003e\n\u003ctd\u003e70 mm Ø, 5.1°, only minimal performance loss at edge of FOV\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWavelength range\u003c\/td\u003e\n\u003ctd\u003e400 – 900 nm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSpot size\u003c\/td\u003e\n\u003ctd\u003e\u0026lt; 6.3 μm RMS across FOV\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOptical coatings\u003c\/td\u003e\n\u003ctd\u003eEnhanced aluminum, XLT multi-coatings used throughout\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOff-axis Illumination\u003c\/td\u003e\n\u003ctd\u003e83% at 30 mm off-axis\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOptical window\u003c\/td\u003e\n\u003ctd\u003e104 mm Ø\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBack focus with included camera adapter\u003c\/td\u003e\n\u003ctd\u003e55 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBack focus from top of threaded collar\u003c\/td\u003e\n\u003ctd\u003e77.5 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOptical Tube\u003c\/td\u003e\n\u003ctd\u003eAluminum\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOptical Tube Length\u003c\/td\u003e\n\u003ctd\u003e42.5\" length, 16\" diameter\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocuser\u003c\/td\u003e\n\u003ctd\u003eNew focuser design, minimizes focus shift\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFinderscope\u003c\/td\u003e\n\u003ctd\u003eNot included\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOptical Tube Weight\u003c\/td\u003e\n\u003ctd\u003e75 lbs\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOther features\u003c\/td\u003e\n\u003ctd\u003eVentilation fan, dual dovetail mounting bars\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eIncluded items\u003c\/td\u003e\n\u003ctd\u003e48 mm camera adapter, fan battery pack\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e","brand":"Celestron","offers":[{"title":"Default Title","offer_id":12465798283357,"sku":"91077","price":13999.0,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/products\/RASA_36_1_570x380_2x_092c4344-9c90-4191-9c16-7398ee2a4dfe.jpg?v=1536074751"},{"product_id":"photron-6-inch-ritchey-chretien-telescope-rc6","title":"Photron 6 inch Ritchey-Chretien (RC6)","description":"\u003cp\u003e\u003cstrong\u003e\u003c\/strong\u003eOptical tube ONLY. \u003cstrong\u003eThis is not a beginner telescope.\u003c\/strong\u003e No diagonal, eyepieces, mount, or other accessories. This is designed for advanced astrophotography.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cspan style=\"color: #ff2a00;\"\u003e\u003cstrong\u003e\u003c\/strong\u003e\u003c\/span\u003e\u003cspan\u003eThe iOptron Photron \u003c\/span\u003eRitchey-Cretien design telescopes feature low thermal expansion quartz primary and secondary mirrors with ninety-nine percent reflective dielectric coatings. The RC optical design delivers coma, spherical and chromatic aberration free results, perfect for color or monochrome imaging. A fixed position primary mirror eliminates image shift that occurs from focusing with other telescope designs. The iOptron RC6 comes with a 2\" dual-speed Crayford focuser. Three focuser extension rings are provided for a “flex-free” solid extension as a means to take up any unneeded back focus. Its steel tube is equipped with knife edge baffles to diminish contrast-reducing stray light, improving the instrument in both visual and imaging uses. A RC6 model comes with a Vixen style dovetail plates.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eComa free, chromatic aberration-free, spherical aberration-free optics\u003c\/li\u003e\n\u003cli\u003e150mm (6\") optical aperture\u003c\/li\u003e\n\u003cli\u003e1370mm focal length\u003c\/li\u003e\n\u003cli\u003ef\/9 focal ratio\u003c\/li\u003e\n\u003cli\u003eFixed primary\u003c\/li\u003e\n\u003cli\u003eLow thermal expansion quartz mirrors\u003c\/li\u003e\n\u003cli\u003eMultiple knife-edge baffle system\u003c\/li\u003e\n\u003cli\u003e2\" dual-speed Crayford focuser\u003c\/li\u003e\n\u003cli\u003eFinder scope base and dovetails bar\u003c\/li\u003e\n\u003cli\u003eOptional finder scope, diagonal and 1.25\" eyepiece\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch5\u003eSpecifications\u003c\/h5\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ctable border=\"1\" cellspacing=\"0\" cellpadding=\"0\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd width=\"206\" align=\"right\"\u003eOptical Design\u003c\/td\u003e\n\u003ctd width=\"396\" align=\"center\"\u003eRitchey-Chretien\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd align=\"right\"\u003eClear Aperture\u003c\/td\u003e\n\u003ctd align=\"center\"\u003e150mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd align=\"right\"\u003eFocal Length\u003c\/td\u003e\n\u003ctd align=\"center\"\u003e1370mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd align=\"right\"\u003eFocal Ratio\u003c\/td\u003e\n\u003ctd align=\"center\"\u003ef\/9\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd align=\"right\"\u003eResolving Power\u003c\/td\u003e\n\u003ctd align=\"center\"\u003e0.76 arc seconds\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd align=\"right\"\u003eLimiting Magnitude\u003c\/td\u003e\n\u003ctd align=\"center\"\u003e13.6\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd align=\"right\"\u003eHighest Useful Magnification\u003c\/td\u003e\n\u003ctd align=\"center\"\u003e180X\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd align=\"right\"\u003eSecondary Mirror Size\u003c\/td\u003e\n\u003ctd align=\"center\"\u003e67mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd align=\"right\"\u003eFocuser\u003c\/td\u003e\n\u003ctd align=\"center\"\u003e10:1 Crayford dual-speed\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd align=\"right\"\u003eFocuser size\u003c\/td\u003e\n\u003ctd align=\"center\"\u003e2”\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd align=\"right\"\u003eDovetail Bar\u003c\/td\u003e\n\u003ctd align=\"center\"\u003eVixen-style\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd align=\"right\"\u003eFinderscope Base\u003c\/td\u003e\n\u003ctd align=\"center\"\u003eYes\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd align=\"right\"\u003eFinder scope\u003c\/td\u003e\n\u003ctd align=\"center\"\u003eOptional\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd align=\"right\"\u003eTube material\u003c\/td\u003e\n\u003ctd align=\"center\"\u003eSteel\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd align=\"right\"\u003eTube Length\u003c\/td\u003e\n\u003ctd align=\"center\"\u003e19.1”\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd align=\"right\"\u003eTube Weight\u003c\/td\u003e\n\u003ctd align=\"center\"\u003e12.3 lbs\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd align=\"right\"\u003eOther Accessories\u003c\/td\u003e\n\u003ctd align=\"center\"\u003e2” to 1.25” compression ring adapter;\u003cspan\u003e \u003c\/span\u003e\u003cbr\u003e1\" long extension tube X2\u003cspan\u003e \u003c\/span\u003e\u003cbr\u003e2\" long extension tube X1\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd align=\"right\"\u003e\u003c\/td\u003e\n\u003ctd align=\"center\"\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd align=\"right\"\u003eWarranty\u003c\/td\u003e\n\u003ctd align=\"center\"\u003eOne year limited\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch5\u003e\u003cb\u003eIn The Box\u003c\/b\u003e\u003c\/h5\u003e\n\u003cp\u003e\u003cb\u003e#6111\u003c\/b\u003e\u003cspan\u003e 6\" RC OTA only\u003c\/span\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eOTA w\/2\" dual speed Crayford focuser\u003c\/li\u003e\n\u003cli\u003e2X25mm, 1X 50mm focus extension tubes\u003c\/li\u003e\n\u003cli\u003e1.25\" accessory adapter\u003c\/li\u003e\n\u003cli\u003eVixen dovetail bar\u003c\/li\u003e\n\u003cli\u003eFinder scope base\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"iOptron","offers":[{"title":"Default Title","offer_id":19782529417309,"sku":"6111","price":558.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/products\/iop-6111.jpg?v=1550776022"},{"product_id":"photron-8-inch-ritchey-chretien-telescope-rc8","title":"Photron 8 inch Ritchey-Chretien (RC8)","description":"\u003cp\u003e\u003cmeta charset=\"utf-8\"\u003e\u003cspan data-mce-fragment=\"1\"\u003eOptical tube ONLY. This is not a beginner telescope. No diagonal, eyepieces, mount, or other accessories.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003eThe iOptron® Photron™ Ritchey-Chretien design telescopes, feature low thermal expansion quartz primary and secondary mirrors with ninety-nine percent reflective dielectric coatings. The RC optical design delivers coma, spherical and chromatic aberration free results, perfect for color or monochrome imaging. A fixed position primary mirror eliminates image shift that occurs from focusing with other telescope designs. The iOptron RC8 comes with a 2\" dual-speed linear-bearing Crayford focuser. Three focuser extension rings are provided for a “flex-free” solid extension as a means to take up any unneeded back focus. Its steel tube is equipped with 10 knife edge baffles to diminish contrast reducing stray light, improving the instrument in both visual and imaging uses. A RC8 model comes with top and bottom dovetail plates adding rigidity to the tube while providing attachment points for the mount and other accessories to be used.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eComa free, chromatic aberration-free, spherical aberration-free optics\u003c\/li\u003e\n\u003cli\u003e200mm (8\") optical aperture\u003c\/li\u003e\n\u003cli\u003e1624mm focal length\u003c\/li\u003e\n\u003cli\u003ef\/8 focal ratio\u003c\/li\u003e\n\u003cli\u003eFixed primary\u003c\/li\u003e\n\u003cli\u003eLow thermal expansion quartz mirrors\u003c\/li\u003e\n\u003cli\u003eMultiple Knife-Edge Baffle System\u003c\/li\u003e\n\u003cli\u003e2\" dual-speed Crayford Focuser\u003c\/li\u003e\n\u003cli\u003eFinder scope base and two dovetails bars\u003c\/li\u003e\n\u003cli\u003eOptional finder scope, diagonal and 1.25\" eyepiece\u003c\/li\u003e\n\u003cli\u003eOptional iOptron Electric Focuser (\u003ca href=\"http:\/\/www.ioptron.com\/product-p\/8451.htm\"\u003e#8451\u003c\/a\u003e)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cbr\u003e\u003cb\u003ePackage includes\u003c\/b\u003e\u003cbr\u003e\n\u003cul\u003e\n\u003cli\u003eOTA w\/2\" dual-speed Crayford focuser\u003c\/li\u003e\n\u003cli\u003e2X25mm, 1X 50mm focus extention\u003c\/li\u003e\n\u003cli\u003e1.25\" accessory adapter\u003c\/li\u003e\n\u003cli\u003eTop Vixen-style mounting bar and bottom Losmandy-style dovetail bar\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003e Specifications\u003c\/strong\u003e\u003c\/p\u003e\n\u003ctable cellpadding=\"0\" cellspacing=\"0\" border=\"1\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd align=\"right\" width=\"206\"\u003eOptical Design\u003c\/td\u003e\n\u003ctd align=\"center\" width=\"396\"\u003eRitchey-Chretien\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd align=\"right\"\u003eClear Aperture\u003c\/td\u003e\n\u003ctd align=\"center\"\u003e200mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd align=\"right\"\u003eFocal Length\u003c\/td\u003e\n\u003ctd align=\"center\"\u003e1624mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd align=\"right\"\u003eFocal Ratio\u003c\/td\u003e\n\u003ctd align=\"center\"\u003ef\/8\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd align=\"right\"\u003eResolving Power\u003c\/td\u003e\n\u003ctd align=\"center\"\u003e0.58 arc seconds\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd align=\"right\"\u003eLimiting Magnitude\u003c\/td\u003e\n\u003ctd align=\"center\"\u003e14.2\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd align=\"right\"\u003eHighest Useful Magnification\u003c\/td\u003e\n\u003ctd align=\"center\"\u003e236X\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd align=\"right\"\u003eSecondary Mirror Size\u003c\/td\u003e\n\u003ctd align=\"center\"\u003e95mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd align=\"right\"\u003eFocuser\u003c\/td\u003e\n\u003ctd align=\"center\"\u003e10:1 Crayford dual-speed\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd align=\"right\"\u003eFocuser size\u003c\/td\u003e\n\u003ctd align=\"center\"\u003e2”\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd align=\"right\"\u003eDovetail Bar\u003c\/td\u003e\n\u003ctd align=\"center\"\u003eLosmandy-style\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd align=\"right\"\u003eMounting Bar (Top)\u003c\/td\u003e\n\u003ctd align=\"center\"\u003eVixen-style\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd align=\"right\"\u003eFinderscope Base\u003c\/td\u003e\n\u003ctd align=\"center\"\u003eYes\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd align=\"right\"\u003eFinder scope\u003c\/td\u003e\n\u003ctd align=\"center\"\u003eOptional\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd align=\"right\"\u003eTube material\u003c\/td\u003e\n\u003ctd align=\"center\"\u003eSteel\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd align=\"right\"\u003eTube Length\u003c\/td\u003e\n\u003ctd align=\"center\"\u003e22.0”\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd align=\"right\"\u003eTube Weight\u003c\/td\u003e\n\u003ctd align=\"center\"\u003e18 lbs\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd align=\"right\"\u003eOther Accessories\u003c\/td\u003e\n\u003ctd align=\"center\"\u003e2” to 1.25” compression ring adapter; \u003cbr\u003e1\" long extension tube X2 \u003cbr\u003e2\" long extension tube X1\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd align=\"right\"\u003eGross Weight\u003c\/td\u003e\n\u003ctd align=\"center\"\u003e25 lbs\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd align=\"right\"\u003eWarranty\u003c\/td\u003e\n\u003ctd align=\"center\"\u003eOne year limited\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e","brand":"iOptron","offers":[{"title":"Default Title","offer_id":20028481273949,"sku":"6112","price":1178.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/RC8.jpg?v=1781970032"},{"product_id":"copy-of-ioptron-photron-10-inch-truss-tube-rc-telescope-rc10-truss","title":"Photron 12 inch Ritchey-Chretien Truss Tube RC","description":"\u003ch5\u003eDescription\u003c\/h5\u003e\n\u003cmeta charset=\"utf-8\"\u003e\n\u003cp\u003e\u003cspan\u003eThe Photon™ line of Ritchey-Chretien astrograph telescope has been expanded with the addition of four new truss tube models (10,12,14 and 16 inch). Designed for today's astro imager, Photron™ truss tube RC telescopes deliver a sharp clear image from one edge to the other. The truss tube models are designed to carry on our long standing reputation for creating and manufacturing solid, stable, accurate tracking mounts, in a high quality RC astrograph telescope.\u003c\/span\u003e\u003cbr\u003e\u003cbr\u003e\u003cspan\u003eiOptron® Photron™ truss tube RC telescopes feature low thermal expansion quartz primary and secondary mirrors with highly reflective dielectric coatings maximizing the light getting to your eyepiece or imagine device. The RC optical design delivers coma, spherical and chromatic aberration free results, perfect for color and monochrome imaging. A fixed position primary mirror eliminates image shift that occurs when focusing from other telescope designs. With 1\/12th wave or better primary mirror our RC scopes delver images and views that are out of this world.\u003c\/span\u003e\u003cbr\u003e\u003cbr\u003e\u003cspan\u003eEach Photron truss tube instrument comes equipped with a dual-speed linear bearing Crayford focuser that can facilitate our optional ASCOM compliant electronic focus control. Three focuser extension rings are provided for a “flex-free” solid extension as a means to take up any unneeded back focus. Its backbone, made up of strong, light, carbon fiber truss supports hold the optics firmly in place while keeping weight to a minimum. It's open air design results in rapid cooling, reducing the \"wait time\" before use. Photron™ by iOptron®, RC truss tube telescopes are sure to meet or exceed even the most discriminating imager or observers expectations.\u003c\/span\u003e\u003c\/p\u003e\n\u003cmeta charset=\"utf-8\"\u003e\n\u003cp\u003e\u003cb\u003eFeatures\u003c\/b\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eComa free, chromatic aberration-free, spherical aberration-free optics\u003c\/li\u003e\n\u003cli\u003e12\" (304mm) optical aperture\u003c\/li\u003e\n\u003cli\u003e2432mm focal length\u003c\/li\u003e\n\u003cli\u003ef\/8 focal ratio\u003c\/li\u003e\n\u003cli\u003eFixed primary\u003c\/li\u003e\n\u003cli\u003eLow thermal expansion quartz mirrors\u003c\/li\u003e\n\u003cli\u003e3\" Dual-speed Crayford focuser\u003c\/li\u003e\n\u003cli\u003eOptional iOptron Electronic Focuser (\u003ca href=\"http:\/\/www.ioptron.com\/product-p\/8451.htm\"\u003e#8451\u003c\/a\u003e)\u003c\/li\u003e\n\u003cli\u003e2X 1\" (25.4mm), 1X 2\" (50.8mm) focus extension rings\u003c\/li\u003e\n\u003cli\u003eCooling fan battery holder\u003c\/li\u003e\n\u003cli\u003ePrimary and secondary mirror covers\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch5\u003eSpecifications\u003c\/h5\u003e\n\u003cmeta charset=\"utf-8\"\u003e\u003cmeta charset=\"utf-8\"\u003e\n\u003ctable border=\"1\" cellspacing=\"0\" cellpadding=\"0\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd width=\"206\" align=\"right\"\u003eOptical Design\u003c\/td\u003e\n\u003ctd width=\"396\" align=\"center\"\u003eRitchey-Chretien\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd align=\"right\"\u003eClear Aperture\u003c\/td\u003e\n\u003ctd align=\"center\"\u003e12\" (304mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd align=\"right\"\u003eFocal Length\u003c\/td\u003e\n\u003ctd align=\"center\"\u003e2432mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd align=\"right\"\u003eFocal Ratio\u003c\/td\u003e\n\u003ctd align=\"center\"\u003ef\/8\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd align=\"right\"\u003eFocuser\u003c\/td\u003e\n\u003ctd align=\"center\"\u003e10:1 Crayford dual-speed\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd align=\"right\"\u003eFocuser size\u003c\/td\u003e\n\u003ctd align=\"center\"\u003e3”\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd align=\"right\"\u003eDovetail Bar\u003c\/td\u003e\n\u003ctd align=\"center\"\u003eLosmandy-style\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd align=\"right\"\u003eMounting Bar (Top)\u003c\/td\u003e\n\u003ctd align=\"center\"\u003eLosmandy-style\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd align=\"right\"\u003eTube material\u003c\/td\u003e\n\u003ctd align=\"center\"\u003eCarbon truss tube\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd align=\"right\"\u003eTube Length\u003c\/td\u003e\n\u003ctd align=\"center\"\u003e850mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd align=\"right\"\u003eTube Weight\u003c\/td\u003e\n\u003ctd align=\"center\"\u003e44 lbs\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd align=\"right\"\u003eOTA Primary Mirror Cooling Fan\u003c\/td\u003e\n\u003ctd align=\"center\"\u003eYes (three built-in fan, with battery holder)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd align=\"right\"\u003eOther Accessories\u003c\/td\u003e\n\u003ctd align=\"center\"\u003e1\" long extension tube X2\u003cspan\u003e \u003c\/span\u003e\u003cbr\u003e2\" long extension tube X1\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd align=\"right\"\u003eGross Weight\u003c\/td\u003e\n\u003ctd align=\"center\"\u003e78 lbs\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd align=\"right\"\u003eWarranty\u003c\/td\u003e\n\u003ctd align=\"center\"\u003eOne year limited\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e","brand":"iOptron","offers":[{"title":"Default Title","offer_id":27739253342301,"sku":"6115","price":4158.0,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/products\/6115-2T.jpg?v=1554834021"},{"product_id":"ioptron-photron-14-inch-truss-tube-rc-telescope-rc14-truss","title":"Photron 14 inch Truss Tube Ritchey-Chretien","description":"\u003cul\u003e\n\u003cli\u003eComa free, chromatic aberration-free, spherical aberration-free optics\u003c\/li\u003e\n\u003cli\u003e14\" (355mm) optical aperture\u003c\/li\u003e\n\u003cli\u003e2848mm focal length\u003c\/li\u003e\n\u003cli\u003ef\/8 focal ratio\u003c\/li\u003e\n\u003cli\u003eFixed primary\u003c\/li\u003e\n\u003cli\u003eLow thermal expansion quartz mirrors\u003c\/li\u003e\n\u003cli\u003e3\" Dual-speed Crayford focuser\u003c\/li\u003e\n\u003cli\u003eOptional iOptron Electronic Focuser\u003c\/li\u003e\n\u003cli\u003e2X 1\" (25.4mm), 1X 2\" (50.8mm) focus extension rings\u003c\/li\u003e\n\u003cli\u003eCooling fan battery holder\u003c\/li\u003e\n\u003cli\u003ePrimary and secondary mirror covers\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cmeta charset=\"utf-8\"\u003e\n\u003ch5\u003eDescription\u003c\/h5\u003e\n\u003cmeta charset=\"utf-8\"\u003e\n\u003cp\u003e\u003cspan\u003eThe Photon™ line of Ritchey-Chretien astrograph telescope has been expanded with the addition of four new truss tube models (10,12,14 and 16 inch). Designed for today's astro imager, Photron™ truss tube RC telescopes deliver a sharp clear image from one edge to the other. The truss tube models are designed to carry on our long standing reputation for creating and manufacturing solid, stable, accurate tracking mounts, in a high quality RC astrograph telescope.\u003c\/span\u003e\u003cbr\u003e\u003cbr\u003e\u003cspan\u003eiOptron® Photron™ truss tube RC telescopes feature low thermal expansion quartz primary and secondary mirrors with highly reflective dielectric coatings maximizing the light getting to your eyepiece or imagine device. The RC optical design delivers coma, spherical and chromatic aberration free results, perfect for color and monochrome imaging. A fixed position primary mirror eliminates image shift that occurs when focusing from other telescope designs. With 1\/12th wave or better primary mirror our RC scopes delver images and views that are out of this world.\u003c\/span\u003e\u003cbr\u003e\u003cbr\u003e\u003cspan\u003eEach Photron truss tube instrument comes equipped with a dual-speed linear bearing Crayford focuser that can facilitate our optional ASCOM compliant electronic focus control. Three focuser extension rings are provided for a “flex-free” solid extension as a means to take up any unneeded back focus. Its backbone, made up of strong, light, carbon fiber truss supports hold the optics firmly in place while keeping weight to a minimum. It's open air design results in rapid cooling, reducing the \"wait time\" before use. Photron™ by iOptron®, RC truss tube telescopes are sure to meet or exceed even the most discriminating imager or observers expectations.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch5\u003eSpecifications\u003c\/h5\u003e\n\u003ctable border=\"1\" cellspacing=\"0\" cellpadding=\"0\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd width=\"206\" align=\"right\"\u003eOptical Design\u003c\/td\u003e\n\u003ctd width=\"396\" align=\"center\"\u003eRitchey-Chretien\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd align=\"right\"\u003eClear Aperture\u003c\/td\u003e\n\u003ctd align=\"center\"\u003e14\" (355mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd align=\"right\"\u003eFocal Length\u003c\/td\u003e\n\u003ctd align=\"center\"\u003e2848mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd align=\"right\"\u003eFocal Ratio\u003c\/td\u003e\n\u003ctd align=\"center\"\u003ef\/8\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd align=\"right\"\u003eFocuser\u003c\/td\u003e\n\u003ctd align=\"center\"\u003e10:1 Crayford dual-speed\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd align=\"right\"\u003eFocuser size\u003c\/td\u003e\n\u003ctd align=\"center\"\u003e3”\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd align=\"right\"\u003eDovetail Bar\u003c\/td\u003e\n\u003ctd align=\"center\"\u003eLosmandy-style\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd align=\"right\"\u003eMounting Bar (Top)\u003c\/td\u003e\n\u003ctd align=\"center\"\u003eLosmandy-style\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd align=\"right\"\u003eTube material\u003c\/td\u003e\n\u003ctd align=\"center\"\u003eCarbon truss tube\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd align=\"right\"\u003eTube Length\u003c\/td\u003e\n\u003ctd align=\"center\"\u003e960mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd align=\"right\"\u003eTube Weight\u003c\/td\u003e\n\u003ctd align=\"center\"\u003e66 lbs\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd align=\"right\"\u003eOTA Primary Mirror Cooling Fan\u003c\/td\u003e\n\u003ctd align=\"center\"\u003eYes (three built-in fan, with battery holder)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd align=\"right\"\u003eOther Accessories\u003c\/td\u003e\n\u003ctd align=\"center\"\u003e1\" long extension tube X2\u003cspan\u003e \u003c\/span\u003e\u003cbr\u003e2\" long extension tube X1\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd align=\"right\"\u003eGross Weight\u003c\/td\u003e\n\u003ctd align=\"center\"\u003e88 lbs\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd align=\"right\"\u003eWarranty\u003c\/td\u003e\n\u003ctd align=\"center\"\u003eOne year limited\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e","brand":"iOptron","offers":[{"title":"Default Title","offer_id":27739278245981,"sku":"6116","price":6088.0,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/products\/6116-2T.jpg?v=1554834319"},{"product_id":"redcat-61-wifd-f-4-9-petzval-apo","title":"RedCat 61 WIFD f\/4.9 Petzval APO","description":"\u003ch1 style=\"text-align: center;\"\u003eRedCat 61 WIFD\u003c\/h1\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/Redcat-61-side-2.jpg?v=1765574105\" alt=\"\"\u003e\u003c\/p\u003e\n\u003cp\u003eDesigned from the ground up with the ability to handle the newest generation of large, heavy, high-resolution cooled cameras, the rock-solid optical tube assembly is uncompromised in quality. The movement of the focuser is integrated inside the main tube assembly, so there are no movements of a focuser drawtube visible from the outside.  Enjoy the benefits of a traditional two speed fine focuser, while not worrying about limitations typically found in traditional rear mounted focusers.\u003cbr\u003e\u003c\/p\u003e\n\u003ch5\u003e\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/RedCat61-views.png?v=1765574040\"\u003e\u003c\/h5\u003e\n\u003cp\u003e\u003cstrong\u003eOptically Unbeatable\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003ePetzval air-spaced objective (FPL-53) in adjustable CNC machined ultra high precision lens cell.\u003c\/li\u003e\n\u003cli\u003eExtremely sharp.\u003c\/li\u003e\n\u003cli\u003eExcellent color correction.\u003c\/li\u003e\n\u003cli\u003eEach lens is Fully Multi-Coated with a special super-high transmission coating (STM Coating) on all surfaces.\u003c\/li\u003e\n\u003cli\u003eThis F\/4.9 lens is ideal for astrophotography.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch2 style=\"text-align: center;\"\u003e\u003cstrong\u003eInternal Focuser\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cp style=\"text-align: left;\"\u003e\u003cstrong\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/WIFD_a1e7997b-ff08-43cb-95f0-b1f03e8f89df.gif?v=1765574040\" alt=\"\"\u003e\u003c\/strong\u003e\u003cmeta charset=\"utf-8\"\u003e \u003cbr\u003e\u003cspan\u003e\u003cstrong\u003eNEW\u003c\/strong\u003e internal focuser.  Our new design includes the Patented WO center focuser with precise internal sliding of fixed optics to prevent image shift. \u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cmeta charset=\"utf-8\"\u003eThe integrated position viewing window on the focuser provides instant verification of the graduated numerical display.  The smooth rack and pinion design is incorporated into the focuser to provide super fine adjustability for critical focus.  The internal movement of the optical elements is protected from the elements and can’t come out of alignment.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCAT Design\u003c\/strong\u003e\u003c\/p\u003e\n\u003cdiv\u003e\n\u003cp\u003eImproved “CAT” design ring tubes and dovetail base are lighter while remaining equally rigid. The new design allows for better balance with heavy accessories, and has integral placement of the focuser knobs, providing easy access to focusing during imaging.\u003cbr\u003e\u003cbr\u003e\u003cstrong\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003ch1 style=\"text-align: center;\"\u003e\u003cstrong\u003eSuper Smooth Field Rotator\u003c\/strong\u003e\u003c\/h1\u003e\n\u003cp\u003eThe field rotator design features smooth camera rotation with markings for degrees and a locking thumbscrew to prevent accidental camera movement.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/Redcat-61-WIFD-details-1.webp?v=1765574040\" alt=\"\"\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003ch2 style=\"text-align: center;\"\u003eOptical Performance\u003c\/h2\u003e\n\u003cp\u003e\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/Redcat-61-Diagram-01.webp?v=1765574040\"\u003e\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/Redcat-61-Diagram-02.webp?v=1765574040\"\u003e \u003c\/p\u003e\n\u003c\/div\u003e\n\u003cp\u003e\u003cstrong\u003eAttention to Details\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThough you will never need it, you have a 2-year warranty from WO, and the certainty that we will be there to assist you even beyond that, if you need!\u003c\/p\u003e\n\u003cul\u003e\u003c\/ul\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ctable class=\"notion-collection-table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cdiv class=\"notion-collection-column-title\"\u003e\n\u003cdiv class=\"notion-collection-column-title-body\"\u003eLens Type\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\u003cspan class=\"notion-property notion-property-text\"\u003e4 Elements Petzval Design\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cdiv class=\"notion-collection-column-title\"\u003e\n\u003cdiv class=\"notion-collection-column-title-body\"\u003eFocal Length\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\u003cspan class=\"notion-property notion-property-text\"\u003e300 mm\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cdiv class=\"notion-collection-column-title\"\u003e\n\u003cdiv class=\"notion-collection-column-title-body\"\u003eDiameter\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\u003cspan class=\"notion-property notion-property-text\"\u003e61 mm\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cdiv class=\"notion-collection-column-title\"\u003e\n\u003cdiv class=\"notion-collection-column-title-body\"\u003eFocal Ratio\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\u003cspan class=\"notion-property notion-property-text\"\u003ef\/4.9\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cdiv class=\"notion-collection-column-title\"\u003e\n\u003cdiv class=\"notion-collection-column-title-body\"\u003eImage Circle\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\u003cspan class=\"notion-property notion-property-text\"\u003e46 mm\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cdiv class=\"notion-collection-column-title\"\u003e\n\u003cdiv class=\"notion-collection-column-title-body\"\u003eFocuser\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv class=\"notion-property-multi_select-item notion-item-purple\"\u003eWIFD R\u0026amp;P Focuser\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cdiv class=\"notion-collection-column-title\"\u003e\n\u003cdiv class=\"notion-collection-column-title-body\"\u003eFocuser Travel Length\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\u003cspan class=\"notion-property notion-property-text\"\u003e0-42 mm (Ruler to 50mm)\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cdiv class=\"notion-collection-column-title\"\u003e\n\u003cdiv class=\"notion-collection-column-title-body\"\u003eAdapter Included\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv class=\"notion-property-multi_select-item notion-item-green\"\u003eTilt Adjuster\u003c\/div\u003e\n\u003cdiv class=\"notion-property-multi_select-item notion-item-yellow\"\u003eM60 → M54 Rotator\u003c\/div\u003e\n\u003cdiv class=\"notion-property-multi_select-item notion-item-default\"\u003eM54 → M48 Adapter\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cdiv class=\"notion-collection-column-title\"\u003e\n\u003cdiv class=\"notion-collection-column-title-body\"\u003eOptional Flattener\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv class=\"notion-property-multi_select-item notion-item-default\"\u003eNo Flattener Required\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cdiv class=\"notion-collection-column-title\"\u003e\n\u003cdiv class=\"notion-collection-column-title-body\"\u003eCamera Format\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv class=\"notion-property-multi_select-item notion-item-yellow\"\u003eFull Frame\u003c\/div\u003e\n\u003cdiv class=\"notion-property-multi_select-item notion-item-blue\"\u003eAPS-C\u003c\/div\u003e\n\u003cdiv class=\"notion-property-multi_select-item notion-item-purple\"\u003eM4\/3\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cdiv class=\"notion-collection-column-title\"\u003e\n\u003cdiv class=\"notion-collection-column-title-body\"\u003eTotal Weight\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\u003cspan class=\"notion-property notion-property-text\"\u003e3.39 kg \/ 7.47 lbs\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cdiv class=\"notion-collection-column-title\"\u003e\n\u003cdiv class=\"notion-collection-column-title-body\"\u003eOTA Weight\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\u003cspan class=\"notion-property notion-property-text\"\u003e2.47 kg \/ 5.45 lbs\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cdiv class=\"notion-collection-column-title\"\u003e\n\u003cdiv class=\"notion-collection-column-title-body\"\u003eTube Length\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\u003cspan class=\"notion-property notion-property-text\"\u003e365 mm\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch5\u003e\u003cbr\u003e\u003c\/h5\u003e\n\u003ch5\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/Redcat61-inthebox.png?v=1765574040\" alt=\"\"\u003e\u003c\/h5\u003e\n\u003ch5\u003eIn the Box\u003c\/h5\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cmeta charset=\"utf-8\"\u003e \u003cspan\u003eWilliam Optics WIFD RedCat 61mm f\/4.9 Apo Refractor OTA\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003eMounting Rings\u003c\/li\u003e\n\u003cli\u003eCNC Carry Handle Bar\u003c\/li\u003e\n\u003cli\u003eDovetail Plate\u003c\/li\u003e\n\u003cli\u003eInnovative Bahtinov Mask Cover (Patented)\u003c\/li\u003e\n\u003cli\u003eSoft Carry Case\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"William Optics","offers":[{"title":"Default Title","offer_id":43967454281987,"sku":"T-C-61RD","price":1398.0,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/Redcat-61-perspective-1.webp?v=1765574040"},{"product_id":"pleiades-68mm-wifd-f-3-8-apo","title":"Pleiades 68mm WIFD f\/3.8 APO","description":"\u003ch1 style=\"text-align: center;\"\u003ePleiades 68\u003c\/h1\u003e\n\u003cp\u003e\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/Pleiades-68-side-1.jpg?v=1766717419\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cem\u003e\u003cstrong\u003e\u003c\/strong\u003e\u003c\/em\u003eEmbark on an astrophotography adventure with the latest addition to our William Optics lineup: the Pleiades 68. This telescope, designed exclusively for imaging, is a testament to precision and performance. As a proud member of the WIFD series, it’s dedicated to the art of astro-imaging.\u003c\/p\u003e\n\u003cp\u003e\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/Pleiades-68-whatsinbox-0.webp?v=1766717036\"\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003ch1 style=\"text-align: center;\"\u003eKey Features\u003cbr\u003e\n\u003c\/h1\u003e\n\u003cul\u003e\n\u003cli\u003e Advanced Optical Design: The Pleiades 68 features a 7-element configuration, ensuring exceptional clarity and sharpness in your astrophotography endeavors. This design effectively minimizes chromatic aberrations, offering true-to-life colors and crisp details.\u003c\/li\u003e\n\u003cli\u003e Wide Aperture for Fast Imaging: The telescope’s 68mm aperture and fast f\/3.8 focal ratio make it perfect for capturing detailed images of distant galaxies and expansive nebulae, allowing for shorter exposure times.\u003c\/li\u003e\n\u003cli\u003e Versatile Camera Compatibility: Understanding the varied requirements of astrophotographers, the Pleiades 68 includes 48mm and 54mm adapters, ensuring compatibility with a broad range of CCD and DSLR cameras.\u003c\/li\u003e\n\u003cli\u003e WIFD Series Excellence: This telescope epitomizes William Optics’ commitment to top-tier astro-imaging instruments within the WIFD series.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cbr\u003e\u003cstrong\u003eExperience the Universe Like Never Before\u003c\/strong\u003e\u003cbr\u003eThe William Optics Pleiades 68 is not just a telescope; it’s a portal to the cosmos. Its exceptional optical performance and imaging capabilities make it an ideal choice for both experienced astrophotographers and beginners eager to explore celestial imaging.\u003cbr\u003e\u003cbr\u003eDiscover the depths of space with unmatched clarity and precision. Welcome to the future of astrophotography with the William Optics Pleiades 68.\u003cbr\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: left;\"\u003e\u003cstrong\u003eIntroducing the WILLIAM OPTICS Internal Focus Design (WIFD) Apochromatic Series.\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThis innovative and revolutionary design combines a precision (patented) internal focusing mechanism with the highest quality optics available, providing the ultimate apochromatic refractor for astrophotography.\u003c\/p\u003e\n\u003cp\u003eDesigned from the ground up with the ability to handle the newest generation of large, heavy, high-resolution cooled cameras, the rock-solid optical tube assembly is uncompromised in quality. The movement of the focuser is integrated inside the main tube assembly, so there are no movements of a focuser drawtube visible from the outside.  Enjoy the benefits of a traditional two speed fine focuser, while not worrying about limitations typically found in traditional rear mounted focusers.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eInternal Focuser\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/WIFD_a1e7997b-ff08-43cb-95f0-b1f03e8f89df.gif?v=1765574040\"\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cmeta charset=\"utf-8\"\u003e\u003cspan\u003e\u003cstrong\u003eNEW\u003c\/strong\u003e internal focuser.  Our new design includes the Patented WO center focuser with precise internal sliding of fixed optics to prevent image shift. \u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cmeta charset=\"utf-8\"\u003eThe integrated position viewing window on the focuser provides instant verification of the graduated numerical display.  The smooth rack and pinion design is incorporated into the focuser to provide super fine adjustability for critical focus.  The internal movement of the optical elements is protected from the elements and can’t come out of alignment.\u003c\/span\u003e\u003c\/p\u003e\n\u003cdiv\u003e\n\u003ch1 style=\"text-align: center;\"\u003eOptical Performance\u003c\/h1\u003e\n\u003cdiv\u003e\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/Pledies68-SpotDiagram.jpg?v=1766717036\"\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\u003ch1 style=\"text-align: center;\"\u003e\u003cstrong\u003eAttention to Details\u003c\/strong\u003e\u003c\/h1\u003e\n\u003cp\u003eThough you will never need it, you have a 2-year warranty from WO, and the certainty that we will be there to assist you even beyond that, if you need!\u003c\/p\u003e\n\u003cul\u003e\u003c\/ul\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch1 style=\"text-align: center;\"\u003eSpecifications\u003c\/h1\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ctable class=\"specifications\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth style=\"width: 397.625px;\" class=\"name\"\u003e\n\u003cp\u003eAperture\u003c\/p\u003e\n\u003c\/th\u003e\n\u003ctd style=\"width: 136.375px;\" class=\"data\"\u003e\n\u003cp\u003e68 mm\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth style=\"width: 397.625px;\" class=\"name\"\u003e\n\u003cp\u003eFocal Length\u003c\/p\u003e\n\u003c\/th\u003e\n\u003ctd style=\"width: 136.375px;\" class=\"data\"\u003e\n\u003cp\u003e260 mm\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth style=\"width: 397.625px;\" class=\"name\"\u003e\n\u003cp\u003eFocal Ratio\u003c\/p\u003e\n\u003c\/th\u003e\n\u003ctd style=\"width: 136.375px;\" class=\"data\"\u003e\n\u003cp\u003ef\/3.8\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth style=\"width: 397.625px;\" class=\"name\"\u003e\n\u003cp\u003eGlass Type\u003c\/p\u003e\n\u003c\/th\u003e\n\u003ctd style=\"width: 136.375px;\" class=\"data\"\u003e\n\u003cp\u003eFPL-53\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth style=\"width: 397.625px;\" class=\"name\"\u003e\n\u003cp\u003eOptical Design\u003c\/p\u003e\n\u003c\/th\u003e\n\u003ctd style=\"width: 136.375px;\" class=\"data\"\u003e\n\u003cp\u003e7-element APO\u003cbr\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth style=\"width: 397.625px;\" class=\"name\"\u003eFocuser\u003c\/th\u003e\n\u003ctd style=\"width: 136.375px;\" class=\"data\"\u003e\n\u003cmeta charset=\"utf-8\"\u003eWIFD (WO INTERNAL FOCUS DESIGN)\u003cspan\u003e \u003c\/span\u003eCompatible with EAF\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth style=\"width: 397.625px;\" class=\"name\"\u003eFlattener\u003c\/th\u003e\n\u003ctd style=\"width: 136.375px;\" class=\"data\"\u003eNone Required\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth style=\"width: 397.625px;\" class=\"name\"\u003e\n\u003cp\u003eImaging Circle\u003c\/p\u003e\n\u003c\/th\u003e\n\u003ctd style=\"width: 136.375px;\" class=\"data\"\u003e\n\u003cp\u003e\u003cspan\u003e48mm Full Frame\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth style=\"width: 397.625px;\" class=\"name\"\u003e\n\u003cp\u003eTube Weight\u003c\/p\u003e\n\u003c\/th\u003e\n\u003ctd style=\"width: 136.375px;\" class=\"data\"\u003e\n\u003cp\u003e\u003cmeta charset=\"utf-8\"\u003e\u003cspan\u003e8.38lbs \/ 3.8kg\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth style=\"width: 397.625px;\" class=\"name\"\u003e\n\u003cp\u003eTube Length\u003c\/p\u003e\n\u003c\/th\u003e\n\u003ctd style=\"width: 136.375px;\" class=\"data\"\u003e\n\u003cp\u003e\u003cmeta charset=\"utf-8\"\u003e\u003cspan\u003e346mm \u003c\/span\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth style=\"width: 397.625px;\" class=\"name\"\u003eTube Length with Dew Shield Extended\u003c\/th\u003e\n\u003ctd style=\"width: 136.375px;\" class=\"data\"\u003e\n\u003cmeta charset=\"utf-8\"\u003e \u003cspan\u003e410mm\u003c\/span\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth style=\"width: 397.625px;\" class=\"name\"\u003e\n\u003cmeta charset=\"utf-8\"\u003e \u003cspan\u003eDew Shield Outer Diameter (for Solar Filter)\u003c\/span\u003e\n\u003c\/th\u003e\n\u003ctd style=\"width: 136.375px;\" class=\"data\"\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003eSee the full manual for instructions and operating details: \u003ca href=\"%20https:\/\/williamoptics.com\/pub\/download\/telescopes\/T-P-68BU\/MANUAL-T-P-68BU.pdf\" target=\"_blank\"\u003ePleiades 68 Manual.pdf\u003c\/a\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eNote:\u003c\/strong\u003e You may need riser blocks to use the Pleiades 68 on some dual-saddle mounts. The focuser impacts on the Celestron Advanced VX and CGX mount saddles (we assume it will also impact the CGEM II saddle). The focus knob also impacts the iOptron CEM70 and GEM45 \/ CEM40 dual-saddle plates. The focuser knob does not impact the SkyWatcher EQ6 and HEQ5 mounts.\u003c\/p\u003e\n\u003ch5\u003eIn the Box\u003c\/h5\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cmeta charset=\"utf-8\"\u003e \u003cspan\u003eWilliam Optics WIFD Pleiades 68 f\/3.8 Apo Refractor OTA\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003eMounting Rings\u003c\/li\u003e\n\u003cli\u003eCNC Carry Handle Bar\u003c\/li\u003e\n\u003cli\u003eDovetail Plate\u003c\/li\u003e\n\u003cli\u003eInnovative Bahtinov Mask Cover (Patented)\u003c\/li\u003e\n\u003cli\u003eSoft Carry Case\u003c\/li\u003e\n\u003cli\u003eM48 and M54 adapter rings\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cem\u003eNote: Uniguide scope shown in some of the photos is NOT included.\u003c\/em\u003e\u003c\/p\u003e","brand":"William Optics","offers":[{"title":"Default Title","offer_id":44464420716803,"sku":"T-P-68BU","price":1998.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/FAT0014_7ed56a3a-6edf-4c36-922c-0755db1bff0d.jpg?v=1766717036"},{"product_id":"pleiades-111mm-wifd-f-4-8-apo","title":"Pleiades 111mm WIFD f\/4.8 APO","description":"\u003cp\u003e\u003cstrong\u003eDelve Deeper into the Universe with the Pleiades 111 Astrograph by William Optics, the Pinnacle of Advanced Astrophotography Equipment.\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eElevate your celestial observations with the Pleiades 111 - 7-Elements Imaging APO Telescope. Designed for serious astrophotographers, this telescope features a cutting-edge internal focusing mechanism and superior apochromatic optics with FPL-53 glass. The Pleiades 111 is built to enhance imaging with large, high-resolution cameras, ensuring superb clarity and performance.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eUnique Features:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003ePrecision Optics:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eThe Pleiades 111 features a septuplet 7-element optical system with a fast f\/4.8 focal ratio, delivering sharp, vibrant images with minimal chromatic aberration.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEnhanced Imaging Capability:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eBoasting a 111mm aperture and 528mm focal length, this telescope captures expansive celestial scenes in detailed clarity.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInnovative Focusing and Design:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eIntegrates an advanced internal focusing system with a camera angle rotator and tilt adapter, ensuring stability and ease of use while accommodating large astro-imaging setups. This innovation exemplifies the WIFD series’ commitment to top-tier astro-imaging technology.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eExplore the night sky with unprecedented detail and precision with the William Optics Pleiades 111, a must-have for dedicated astrophotographers.\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ctable class=\"specifications\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth style=\"width: 397.625px;\" class=\"name\"\u003e\n\u003cp\u003eAperture\u003c\/p\u003e\n\u003c\/th\u003e\n\u003ctd style=\"width: 136.375px;\" class=\"data\"\u003e\n\u003cp\u003e111 mm\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth style=\"width: 397.625px;\" class=\"name\"\u003e\n\u003cp\u003eFocal Length\u003c\/p\u003e\n\u003c\/th\u003e\n\u003ctd style=\"width: 136.375px;\" class=\"data\"\u003e\n\u003cp\u003e532 mm\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth style=\"width: 397.625px;\" class=\"name\"\u003e\n\u003cp\u003eFocal Ratio\u003c\/p\u003e\n\u003c\/th\u003e\n\u003ctd style=\"width: 136.375px;\" class=\"data\"\u003e\n\u003cp\u003ef\/4.8\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth style=\"width: 397.625px;\" class=\"name\"\u003e\n\u003cp\u003eGlass Type\u003c\/p\u003e\n\u003c\/th\u003e\n\u003ctd style=\"width: 136.375px;\" class=\"data\"\u003e\n\u003cp\u003eFPL 53\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth style=\"width: 397.625px;\" class=\"name\"\u003e\n\u003cp\u003eOptical Design\u003c\/p\u003e\n\u003c\/th\u003e\n\u003ctd style=\"width: 136.375px;\" class=\"data\"\u003e\n\u003cp\u003e7-element APO\u003cbr\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth style=\"width: 397.625px;\" class=\"name\"\u003e\n\u003cp\u003eTube Weight\u003c\/p\u003e\n\u003c\/th\u003e\n\u003ctd style=\"width: 136.375px;\" class=\"data\"\u003e\n\u003cp\u003e17.5 lbs.\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth style=\"width: 397.625px;\" class=\"name\"\u003e\n\u003cp\u003eTube Length\u003c\/p\u003e\n\u003c\/th\u003e\n\u003ctd style=\"width: 136.375px;\" class=\"data\"\u003e\n\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth style=\"width: 397.625px;\" class=\"name\"\u003e\n\u003cmeta charset=\"utf-8\"\u003e \u003cspan\u003eDew Shield Outer Diameter (for Solar Filter)\u003c\/span\u003e\n\u003c\/th\u003e\n\u003ctd style=\"width: 136.375px;\" class=\"data\"\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch3\u003eIn the Box\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cmeta charset=\"utf-8\"\u003e \u003cspan\u003eWilliam Optics WIFD Pleiades 111 f\/4.8 Apo Refractor OTA\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003eMounting Rings\u003c\/li\u003e\n\u003cli\u003eCNC Carry Handle Bar\u003c\/li\u003e\n\u003cli\u003eDovetail Plate\u003c\/li\u003e\n\u003cli\u003eInnovative Bahtinov Mask Cover (Patented)\u003c\/li\u003e\n\u003cli\u003eSoft Carry Case\u003c\/li\u003e\n\u003cli\u003eM48 and M54 adapter rings\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003ca href=\"https:\/\/support.williamoptics.com\/products\/pleiades-111\" rel=\"noopener\" target=\"_blank\"\u003eOnline Manual\u003c\/a\u003e - Instructions for back focus adjustment, installation of EAF, tilt adjustment, and focuser tension.\u003c\/p\u003e","brand":"William Optics","offers":[{"title":"Default Title","offer_id":44464454598915,"sku":"T-P-111BU","price":3698.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/pleiades_111-1__1.jpg?v=1725040227"},{"product_id":"redcat-51-wifd-f-4-9-iii","title":"RedCat 51 WIFD f\/4.9 III","description":"\u003ch1 class=\"h2\" style=\"text-align: center;\"\u003eRedCat 51 WIFD\u003c\/h1\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/Redcat-51-side-1.png?v=1765573110\" alt=\"\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/Screenshot_2025-12-12_at_1.57.14_PM.png?v=1765573125\" alt=\"\"\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e51mm quadruplet ED APO f\/4.9 (250mm fl)\u003c\/li\u003e\n\u003cli\u003eFPL53 \u0026amp; FPL51 glass \u003c\/li\u003e\n\u003cli\u003e5.25 lbs weight with rings, dovetail, handlebar.\u003c\/li\u003e\n\u003cli\u003e\u0026gt;43mm imaging circle with a flat field edge to edge for full-frame sensors\u003c\/li\u003e\n\u003cli\u003eDual Vixen and Arca Swiss Dovetail\u003c\/li\u003e\n\u003cli\u003eM48 thread to accept wide t-rings\/t-mounts\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/MANUAL-L-RC51RDIII.pdf?v=1702609052\" target=\"_blank\"\u003eRedCat 51 WIFD III Manual (pdf)\u003c\/a\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/Redcat-51-Diagram-01.webp?v=1765572908\" alt=\"\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/Redcat-51-Diagram-02_45d3eca5-54b8-4e38-9bc6-56aa25b94bd9.webp?v=1765572909\" alt=\"\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/Redcat-51-Diagram-03_08bad8fc-958f-4e99-890d-16d905bc3523.webp?v=1765572908\" alt=\"\"\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/RedCat-51-gallery01.webp?v=1765573228\" alt=\"\"\u003e\u003cspan\u003eIC4603 Reflection Nebula in Ophiuchus by \u003cmeta charset=\"utf-8\"\u003e \u003ca class=\"link\" href=\"https:\/\/www.astrobin.com\/jhs434\/B\/\"\u003eJaroslav Salva\u003c\/a\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e51 mm lens, in a sleek Petzval design, using Synthetic Fluoride (FPL53 and FPL51) glass for a full-frame flat field image. The optical quality provides exceptional performance at a fast focal ratio of f\/4.9. \u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003eFilter Adapter allows use of 48mm filters. Focusing is made easy with a bahtinov mask integrated into the lens cap. \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch5\u003eSpecifications\u003c\/h5\u003e\n\u003ctable class=\"specifications\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth class=\"name\"\u003eAperture\u003c\/th\u003e\n\u003ctd class=\"data\"\u003e51 mm (2\")\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth class=\"name\"\u003eCamera\/Eyepiece Connection\u003c\/th\u003e\n\u003ctd class=\"data\"\u003eMale M48x0.75\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth class=\"name\"\u003eDawes Limit\u003c\/th\u003e\n\u003ctd class=\"data\"\u003e0.46 arcseconds\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth class=\"name\"\u003eFocal Length\u003c\/th\u003e\n\u003ctd class=\"data\"\u003e250 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth class=\"name\"\u003eFocal Ratio\u003c\/th\u003e\n\u003ctd class=\"data\"\u003ef\/4.9\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth class=\"name\"\u003eGlass Type\u003c\/th\u003e\n\u003ctd class=\"data\"\u003eFPL-53 and FPL-51\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth class=\"name\"\u003eHighest Useful Magnification\u003c\/th\u003e\n\u003ctd class=\"data\"\u003e102x\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth class=\"name\"\u003eLight Gathering Power\u003c\/th\u003e\n\u003ctd class=\"data\"\u003e53x\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth class=\"name\"\u003eLimiting Magnitude\u003c\/th\u003e\n\u003ctd class=\"data\"\u003e12.3\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth class=\"name\"\u003eOptical Design\u003c\/th\u003e\n\u003ctd class=\"data\"\u003ePetzval\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth class=\"name\"\u003eTube Color\u003c\/th\u003e\n\u003ctd class=\"data\"\u003eRed\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth class=\"name\"\u003eTube Diameter\u003c\/th\u003e\n\u003ctd class=\"data\"\u003e84mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth class=\"name\"\u003eTube Weight\u003c\/th\u003e\n\u003ctd class=\"data\"\u003e5.25 lbs\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth class=\"name\"\u003eDew Shield Outer Diameter (for soar filter sizing)\u003c\/th\u003e\n\u003ctd class=\"data\"\u003e84mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cmeta charset=\"utf-8\"\u003e\u003cspan\u003e\u003cstrong\u003eNote:\u003c\/strong\u003e You may need a riser block to use the RedCat 51 on some dual-saddle mounts. The focuser impacts the plate on the Celestron Advanced VX mount saddle that accepts both CG5 and CGE plates. The focus knob does not impact the Celestron CGX saddle, or the iOptron CEM70 and GEM45 \/ CEM40 dual-saddle plates. The focuser knob does not impact the SkyWatcher EQ6 and HEQ5 mounts.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch5\u003eIn The Box\u003c\/h5\u003e\n\u003cul\u003e\n\u003cli\u003eRedCat 51mm Telescope\u003c\/li\u003e\n\u003cli\u003eBahtinov Mask Cap\u003c\/li\u003e\n\u003cli\u003e210mm Dovetail\u003c\/li\u003e\n\u003cli\u003eUpgraded Mount Ring (with cat paw logo)\u003c\/li\u003e\n\u003cli\u003eSoft Carry Case\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e \u003c\/p\u003e","brand":"William Optics","offers":[{"title":"Default Title","offer_id":44495503687939,"sku":"L-RC51RDIII","price":888.0,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/Redcat-51-perspective-1.webp?v=1765573353"},{"product_id":"8-rasa-imaging-kit","title":"8\" RASA Imaging Kit","description":"\u003cul\u003e\n\u003cli\u003e\n\u003cb\u003eA Winning Astrophotography Kit\u003c\/b\u003e\u003cspan\u003e \u003c\/span\u003e– Combine the legendary 8\" Rowe-Ackermann Schmidt Astrograph with two must-have filters—the Light Pollution Reduction Filter and the Hα-Hβ-OIII Filter—for a blazing-fast f\/2.0 system that can produce stunning images of a wide array of astroimaging targets.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eUltra-fast Rowe-Ackermann Schmidt f\/2.0 Optics\u003c\/b\u003e\u003cspan\u003e \u003c\/span\u003e– Don't spend hours capturing your images—with RASA 8's f\/2.0 optical system, you can gather the same image brightness 25 times faster than an f\/10 system. And RASA 8 images aren't just bright and full of detail; they're also free from optical defects like field curvature, coma, astigmatism, and chromatic aberration.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003ePatented Technology that Researchers Trust\u003c\/b\u003e\u003cspan\u003e \u003c\/span\u003e– Beyond imaging, RASA is the perfect tool for detecting errant space junk and asteroids. Scientists and government agencies use RASA arrays to monitor the space environment and protect our satellites.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eBuilt for Today's Cameras\u003c\/b\u003e\u003cspan\u003e \u003c\/span\u003e– Designed with color astronomical CMOS cameras, smaller CCD cameras, and mirrorless cameras in mind, RASA 8's flat field provides pinpoint stars and excellent performance across an entire APS-C sensor.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eUltra-Stable Focus System\u003c\/b\u003e\u003cspan\u003e \u003c\/span\u003e– A precision linear ball bearing virtually eliminates image shift. RASA performs over a wider spectral range than most telescopes, from 400 nm to 800 nm, so more of the light passing through the astrograph is in sharp focus.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eIncludes Two RASA Imaging Filters\u003c\/b\u003e\u003cspan\u003e \u003c\/span\u003e– When you purchase this kit, your RASA is ready to handle a variety of imaging targets and observing conditions right out of the box. The Light Pollution Reduction Filter and Hα-Hβ-OIII Filter enhance your images of faint targets like nebulae by blocking light pollution, improving image contrast, and darkening the sky background. Celestron engineers designed each filter to fit seamlessly into RASA 8's optical path.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch5\u003eDescription\u003c\/h5\u003e\n\u003cp\u003eCapture spectacular wide-field deep sky images in seconds with Celestron’s new portable astrograph, the 8” Rowe-Ackermann Schmidt Astrograph (RASA). This incredibly fast f\/2.0 system is the perfect companion to today’s color astronomical CMOS cameras, smaller CCD cameras, and mirrorless cameras. Thanks to its fast focal ratio and patented optical design, you can produce sharp, detailed images and, in many cases, skip the autoguider completely. Weighing in at just 17 pounds, it’s easy to transport your 8” RASA to the most remote dark sky locations.\u003cstrong\u003e \u003c\/strong\u003e\u003c\/p\u003e\n\u003cdiv class=\"product-summary rte\"\u003e\n\u003cp\u003e\u003cstrong\u003eRASA Performance Made for Everyone\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe 8” RASA is an imaging telescope that delivers a flat field without optical aberrations for razor sharp stars across a wide field of view. It can capture stunning deep-sky astronomical images without the challenges typically presented by longer focal length instruments at a fraction of the cost of those systems.\u003c\/p\u003e\n\u003cp\u003ePurely designed for imaging, the 8” RASA cannot be used visually. The prime focus focal plane is located at the front of the optical system, so it cannot accommodate a traditional eyepiece.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eShorter Exposure Times and Virtual “Real-Time” Observing\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eSince it is an F\/2.0 optical system, imagers can use shorter exposure times to capture detail in faint objects. When combined with sensitive cameras and the proper “live stacking” software, the 8” RASA can provide an almost real-time observing experience. View images on a computer instantly that are brighter and more detailed than can be seen in much bigger telescopes with the naked eye.\u003c\/p\u003e\n\u003cp\u003eBecause shorter exposure times are possible, your equatorial mount won’t need to accurately track over extended periods. The 8” RASA’s relatively short 400mm focal length also lessens equatorial tracking demands. In many cases, autoguiding will not be required. Weighing only 17 lb, this optical tube pairs perfectly with a wide variety of mounts.\u003c\/p\u003e\n\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eBuilt for Today’s Latest Cameras\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eUnlike the larger RASAs that work with DSLR and large CCD cameras, the 8” model was designed with color astronomical CMOS cameras, smaller CCD cameras, and mirrorless cameras in mind. It is optimized for sensors with up to a 22mm diagonal, but still performs well with larger (up to 32mm diagonal) sensors. As such, it works well with APS-C sized sensors used in many mirrorless cameras.\u003c\/p\u003e\n\u003cp\u003eCamera adapters to connect C-mount cameras and cameras which mount with M42 threads are included. Celestron offers optional adapters to connect your 8” RASA to Sony or Canon mirrorless cameras.\u003c\/p\u003e\n\u003ch5\u003eSpecifications\u003c\/h5\u003e\n\u003ctable class=\"table-open\" id=\"product-specs-list\"\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eOPTICAL TUBE INFO:\u003c\/th\u003e\n\u003cth\u003e\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody id=\"spec-block-1\"\u003e\n\u003ctr\u003e\n\u003ctd\u003eOptical Design\u003c\/td\u003e\n\u003ctd\u003eRowe-Ackermann Schmidt Astrograph\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAperture\u003c\/td\u003e\n\u003ctd\u003e203 mm (8\")\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocal Length\u003c\/td\u003e\n\u003ctd\u003e400 mm (15.74\")\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocal Ratio\u003c\/td\u003e\n\u003ctd\u003ef\/2.0\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCentral obstruction diameter\u003c\/td\u003e\n\u003ctd\u003e93 mm (3.66\") (46% of aperture diameter)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eLight Gathering Power (Compared to human eye)\u003c\/td\u003e\n\u003ctd\u003e843x\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eResolution (Rayleigh)\u003c\/td\u003e\n\u003ctd\u003e0.68 arc seconds\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eResolution (Dawes)\u003c\/td\u003e\n\u003ctd\u003e0.57 arc seconds\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eImage Circle\u003c\/td\u003e\n\u003ctd\u003e22 mm (.86\") Ø, 3.15°\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eUseable field\u003c\/td\u003e\n\u003ctd\u003e32 mm (1.26\") Ø, 4.6°, only minimal performance loss at edge of FOV\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWavelength range\u003c\/td\u003e\n\u003ctd\u003e390 - 800 nm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSpot size\u003c\/td\u003e\n\u003ctd\u003e\u0026lt; 4.6 μm RMS across image circle\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOptical Coatings\u003c\/td\u003e\n\u003ctd\u003eStarBright XLT\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOff-axis Illumination\u003c\/td\u003e\n\u003ctd\u003e93% at 11 mm (.43\") off-axis\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOptical Window\u003c\/td\u003e\n\u003ctd\u003e46 mm (1.81\") Ø\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBack focus with included camera adapter\u003c\/td\u003e\n\u003ctd\u003e25 mm (.98\")\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBack focus from top of threaded collar\u003c\/td\u003e\n\u003ctd\u003e29 mm (1.14\")\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOptical Tube\u003c\/td\u003e\n\u003ctd\u003eAluminum\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOptical Tube Length\u003c\/td\u003e\n\u003ctd\u003e628 mm (24.7\") length, 235 mm (9.3\") diameter\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocuser\u003c\/td\u003e\n\u003ctd\u003eUltra-Stable Focusing System\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFinderscope\u003c\/td\u003e\n\u003ctd\u003eNot included\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOptical Tube Weight\u003c\/td\u003e\n\u003ctd\u003e17 lbs (7.7 kg)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOther Features\u003c\/td\u003e\n\u003ctd\u003eAir-cooling system, integrated filter mount\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eIncluded items\u003c\/td\u003e\n\u003ctd\u003eM42 camera adapter, C-thread camera adapter, fan battery pack\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDovetail\u003c\/td\u003e\n\u003ctd\u003eCGE Dovetail Bar\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e","brand":"Celestron","offers":[{"title":"Default Title","offer_id":44837218058499,"sku":"91079","price":2599.0,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/91079_RASA_8_Imaging_Kit_01_570x380_2x_1.webp?v=1710354832"},{"product_id":"minicat-51-wifd-f-3-5","title":"MiniCat 51 WIFD f\/3.5","description":"\u003cp\u003e \u003c\/p\u003e\n\u003cdiv\u003e\n\u003cmeta charset=\"utf-8\"\u003e\n\u003cp dir=\"ltr\"\u003e\u003cspan\u003eThe MiniCat 51 is designed for photography enthusiasts who love wide-angle views. Its standout feature is an ultra-bright f\/3.5 aperture, allowing you to capture faint nebulae or comets in a very short time. (The f\/3.5 aperture lets in twice as much light as an f\/5 aperture.)\u003c\/span\u003e\u003cb\u003e\u003c\/b\u003e\u003c\/p\u003e\n\u003cp dir=\"ltr\"\u003e\u003cspan\u003eThe MiniCat uses the latest Petzval design with 6 lens elements, including 2 Super ED and lanthanum lenses to perfectly control chromatic aberration. It’s currently the only high-quality, short focal length 178mm f\/3.5 astrograph telescope available on the market.\u003c\/span\u003e\u003cb\u003e\u003c\/b\u003e\u003c\/p\u003e\n\u003cp dir=\"ltr\"\u003e\u003cspan\u003eThe MiniCat holds three unique patents, ensuring easy and perfect focusing along with coaxial image quality to prevent drawtube tilt issues caused by optical misalignment.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003ctable class=\"notion-collection-table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cdiv class=\"notion-collection-column-title\"\u003e\n\u003cdiv class=\"notion-collection-column-title-body\"\u003eLens Type\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\u003cspan class=\"notion-property notion-property-text\"\u003e6 Elements Petzval Design\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cdiv class=\"notion-collection-column-title\"\u003e\n\u003cdiv class=\"notion-collection-column-title-body\"\u003eFocal Length\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\u003cspan class=\"notion-property notion-property-text\"\u003e178 mm\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cdiv class=\"notion-collection-column-title\"\u003e\n\u003cdiv class=\"notion-collection-column-title-body\"\u003eDiameter\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\u003cspan class=\"notion-property notion-property-text\"\u003e51 mm\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cdiv class=\"notion-collection-column-title\"\u003e\n\u003cdiv class=\"notion-collection-column-title-body\"\u003eFocal Ratio\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\u003cspan class=\"notion-property notion-property-text\"\u003ef\/3.5\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cdiv class=\"notion-collection-column-title\"\u003e\n\u003cdiv class=\"notion-collection-column-title-body\"\u003eImage Circle\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\u003cspan class=\"notion-property notion-property-text\"\u003e43.2 mm\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cdiv class=\"notion-collection-column-title\"\u003e\n\u003cdiv class=\"notion-collection-column-title-body\"\u003eFocuser\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv class=\"notion-property-multi_select-item notion-item-purple\"\u003eWIFD R\u0026amp;P Focuser\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cdiv class=\"notion-collection-column-title\"\u003e\n\u003cdiv class=\"notion-collection-column-title-body\"\u003eFocuser Travel Length\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\u003cspan class=\"notion-property notion-property-text\"\u003e0-28 mm (Ruler to 40)\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cdiv class=\"notion-collection-column-title\"\u003e\n\u003cdiv class=\"notion-collection-column-title-body\"\u003eAdapter Included\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv class=\"notion-property-multi_select-item notion-item-green\"\u003eTilt Adjuster\u003c\/div\u003e\n\u003cdiv class=\"notion-property-multi_select-item notion-item-yellow\"\u003eRotator\u003c\/div\u003e\n\u003cdiv class=\"notion-property-multi_select-item notion-item-default\"\u003eM54 → M48 Adapter\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cdiv class=\"notion-collection-column-title\"\u003e\n\u003cdiv class=\"notion-collection-column-title-body\"\u003eOptional Flattener\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv class=\"notion-property-multi_select-item notion-item-default\"\u003eNo Flattener Required\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cdiv class=\"notion-collection-column-title\"\u003e\n\u003cdiv class=\"notion-collection-column-title-body\"\u003eCamera Format\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv class=\"notion-property-multi_select-item notion-item-yellow\"\u003eFull Frame (Compatible)\u003c\/div\u003e\n\u003cdiv class=\"notion-property-multi_select-item notion-item-blue\"\u003eAPS-C (Recommend)\u003c\/div\u003e\n\u003cdiv class=\"notion-property-multi_select-item notion-item-purple\"\u003eM4\/3\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cdiv class=\"notion-collection-column-title\"\u003e\n\u003cdiv class=\"notion-collection-column-title-body\"\u003eTotal Weight\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\u003cspan class=\"notion-property notion-property-text\"\u003e2.29 kg \/ 5.05 lbs\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cdiv class=\"notion-collection-column-title\"\u003e\n\u003cdiv class=\"notion-collection-column-title-body\"\u003eOTA Weight\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\u003cspan class=\"notion-property notion-property-text\"\u003e1.67 kg \/ 3.68 lbs\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cdiv class=\"notion-collection-column-title\"\u003e\n\u003cdiv class=\"notion-collection-column-title-body\"\u003eTube Length\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\u003cspan class=\"notion-property notion-property-text\"\u003e210 mm\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003ca href=\"https:\/\/support.williamoptics.com\/products\/minicat-51-wifd\"\u003eOnline Manual\u003c\/a\u003e\u003c\/p\u003e","brand":"William Optics","offers":[{"title":"Default Title","offer_id":45925491147011,"sku":"T-C-MINI-RD","price":988.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/minicat-pers-1.webp?v=1772040396"},{"product_id":"redcat-91-wifd","title":"Cat 91","description":"\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg style=\"border-radius: 20px;\" alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/redcat-91-wifd-hero.webp?v=1765566029\"\u003e\u003c\/p\u003e\n\u003ch1 class=\"h3\" style=\"text-align: center;\"\u003eThe cat with medium-format soul\u003c\/h1\u003e\n\u003cdiv\u003e\n\u003cp\u003eAn advanced apochromatic refractor tailored for full-frame and medium-format cameras. This latest addition to the RedCat series combines portability with superior optical performance, making it a versatile tool for capturing breathtaking detail in deep-sky objects.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003c\/div\u003e\n\u003ctable style=\"border-radius: 20px;\" width=\"100%\" bgcolor=\"black\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e \u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/cat-91-Spec-icon__1.avif?v=1765047847\" style=\"display: block; margin-left: auto; margin-right: auto;\"\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eStep up your astrophotography game with the William Optics RedCat 91, an advanced apochromatic refractor tailored for full-frame and medium-format cameras. This latest addition to the RedCat series combines portability with superior optical performance, making it a versatile tool for capturing breathtaking detail in deep-sky objects.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3\u003e\u003cspan\u003eHighlights:\u003cbr\u003e\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003ePetzval Design, No Backfocus Hassles\u003cbr\u003e\u003c\/strong\u003eThe 5-element Petzval design eliminates the need for backfocus adjustments, providing sharp, edge-to-edge images with pinpoint stars—ideal for wide-field and detailed astrophotography alike.\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eFull-Frame \u0026amp; Medium-Format Ready, No Extra Flattener Needed\u003cbr\u003e\u003c\/strong\u003eWith a large 55mm image circle, the RedCat 91 is perfect for both full-frame and medium-format cameras. Its advanced optics achieve flat-field images without requiring an additional flattener, giving astrophotographers the freedom to capture expansive views with unparalleled clarity.\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eFast f\/4.9 Focal Ratio\u003cbr\u003e\u003c\/strong\u003eThe RedCat 91's fast f\/4.9 focal ratio is designed for bright, vivid captures of galaxies, nebulae, and beyond, ensuring excellent light-gathering power and sharp detail even on faint celestial objects.\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eSeamless WIFD Focusing\u003cbr\u003e\u003c\/strong\u003eEquipped with William Optics' WIFD focuser, the RedCat 91 provides precise, stable focusing without additional adjustments, enhancing the ease of use for both seasoned astrophotographers and beginners.\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eThe RedCat 91 blends the trusted RedCat heritage with William Optics’ innovative design, making it the ultimate choice for those ready to elevate their night-sky explorations.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/Cat-91-WIFD-whatsinbox_1.webp?v=1765566033\" alt=\"\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003ctable class=\"notion-collection-table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cdiv class=\"notion-collection-column-title\"\u003e\n\u003cdiv class=\"notion-collection-column-title-body\"\u003eLens Type\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\u003cspan class=\"notion-property notion-property-text\"\u003e5 Elements Advanced Petzval Design\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cdiv class=\"notion-collection-column-title\"\u003e\n\u003cdiv class=\"notion-collection-column-title-body\"\u003eFocal Length\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\u003cspan class=\"notion-property notion-property-text\"\u003e448 mm\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cdiv class=\"notion-collection-column-title\"\u003e\n\u003cdiv class=\"notion-collection-column-title-body\"\u003eDiameter\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\u003cspan class=\"notion-property notion-property-text\"\u003e91 mm\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cdiv class=\"notion-collection-column-title\"\u003e\n\u003cdiv class=\"notion-collection-column-title-body\"\u003eFocal Ratio\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\u003cspan class=\"notion-property notion-property-text\"\u003ef\/4.9\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cdiv class=\"notion-collection-column-title\"\u003e\n\u003cdiv class=\"notion-collection-column-title-body\"\u003eImage Circle\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\u003cspan class=\"notion-property notion-property-text\"\u003e55mm\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cdiv class=\"notion-collection-column-title\"\u003e\n\u003cdiv class=\"notion-collection-column-title-body\"\u003eFocuser\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv class=\"notion-property-multi_select-item notion-item-purple\"\u003eWIFD R\u0026amp;P Focuser\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cdiv class=\"notion-collection-column-title\"\u003e\n\u003cdiv class=\"notion-collection-column-title-body\"\u003eFocuser Travel Length\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\u003cspan class=\"notion-property notion-property-text\"\u003e0-36 mm (Ruler to 40mm)\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cdiv class=\"notion-collection-column-title\"\u003e\n\u003cdiv class=\"notion-collection-column-title-body\"\u003eAdapter Included\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv class=\"notion-property-multi_select-item notion-item-green\"\u003eTilt Adjuster\u003c\/div\u003e\n\u003cdiv class=\"notion-property-multi_select-item notion-item-yellow\"\u003eRotator\u003c\/div\u003e\n\u003cdiv class=\"notion-property-multi_select-item notion-item-default\"\u003eM63 → M54 Adapter\u003c\/div\u003e\n\u003cdiv class=\"notion-property-multi_select-item notion-item-default\"\u003eM63 → M48 Adapter\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cdiv class=\"notion-collection-column-title\"\u003e\n\u003cdiv class=\"notion-collection-column-title-body\"\u003eOptional Flattener\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv class=\"notion-property-multi_select-item notion-item-default\"\u003eNo Flattener Required\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cdiv class=\"notion-collection-column-title\"\u003e\n\u003cdiv class=\"notion-collection-column-title-body\"\u003eCamera Format\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv class=\"notion-property-multi_select-item notion-item-red\"\u003eMedium Format (needs additional adapter)\u003c\/div\u003e\n\u003cdiv class=\"notion-property-multi_select-item notion-item-yellow\"\u003eFull Frame\u003c\/div\u003e\n\u003cdiv class=\"notion-property-multi_select-item notion-item-blue\"\u003eAPS-C\u003c\/div\u003e\n\u003cdiv class=\"notion-property-multi_select-item notion-item-purple\"\u003eM4\/3\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cdiv class=\"notion-collection-column-title\"\u003e\n\u003cdiv class=\"notion-collection-column-title-body\"\u003eTotal Weight\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\u003cspan class=\"notion-property notion-property-text\"\u003e6.3 kg \/ 13.89 lbs\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cdiv class=\"notion-collection-column-title\"\u003e\n\u003cdiv class=\"notion-collection-column-title-body\"\u003eOTA Weight\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\u003cspan class=\"notion-property notion-property-text\"\u003e4.72 kg \/ 10.41 lbs\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cdiv class=\"notion-collection-column-title\"\u003e\n\u003cdiv class=\"notion-collection-column-title-body\"\u003eTube Length\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\u003cspan class=\"notion-property notion-property-text\"\u003e556 mm\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/Cat91-inthebox.png?v=1765566237\" alt=\"\"\u003e\u003c\/p\u003e\n\u003ch1 style=\"text-align: center;\"\u003eOptical Performance\u003c\/h1\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/Diagram_Cat-91_1_1.webp?v=1765824041\" alt=\"\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/Diagram_Cat-91_1-1_1.webp?v=1765824044\" alt=\"\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/Diagram_Cat-91_2_1.webp?v=1765824047\" alt=\"\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/Diagram_Cat-91_3_1.webp?v=1765824093\" alt=\"\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/Diagram_Cat-91_4_1.webp?v=1765824096\" alt=\"\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cbr\u003e\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/FOV-cat91-C-02_3195c3da-bde1-4c80-9f5d-50737fd7d26b.webp?v=1765566508\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/Cat-91-Gallery-m45.webp?v=1765050595\" alt=\"\"\u003e\u003c\/p\u003e\n\u003ch4\u003e▲ M45 (Full-Frame)\u003c\/h4\u003e\n\u003cp\u003eCat 91 + ZWO ASI 6200MC Pro\u003cbr\u003eCourtesy of Dear Bear\u003c\/p\u003e\n\u003col\u003e\n\u003cli\u003eStacked ( After Process )\u003c\/li\u003e\n\u003cli\u003eOriginal Single Shot Corner Grid\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/Cat-91-Gallery-m45-single-grid.webp?v=1765050595\" alt=\"\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/Cat-91-Gallery-Rosette_final.webp?v=1765050595\" alt=\"\"\u003e\u003c\/p\u003e\n\u003cp\u003eNGC 2237 Rosette by \u003cmeta charset=\"utf-8\"\u003e\u003cspan\u003e\u003ca class=\"link\" href=\"https:\/\/youtu.be\/Ly60EQ8eBfM?si=r8bHy_Mclm0mzfOz\"\u003eReynold Edwards\u003c\/a\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/Cat-91-Gallery-Andromeda_final.webp?v=1765050595\" alt=\"\"\u003e\u003c\/span\u003e\u003cspan\u003eM31 Andromeda by \u003cmeta charset=\"utf-8\"\u003e \u003ca class=\"link\" href=\"https:\/\/youtu.be\/Ly60EQ8eBfM?si=r8bHy_Mclm0mzfOz\"\u003eReynold Edwards\u003c\/a\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003ca rel=\"noopener\" href=\"https:\/\/support.williamoptics.com\/products\/cat-91-wifd\" target=\"_blank\"\u003e\u003cspan\u003eOnline Manual\u003c\/span\u003e\u003c\/a\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e","brand":"William Optics","offers":[{"title":"Black","offer_id":47401527771395,"sku":"T-C-91","price":2998.0,"currency_code":"USD","in_stock":true},{"title":"Red","offer_id":47401527705859,"sku":"T-C-91-RD","price":2998.0,"currency_code":"USD","in_stock":true},{"title":"Space Grey","offer_id":47401527804163,"sku":"T-C-91-SG","price":2998.0,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/Cat-91-WIFD-pers-1.jpg?v=1766177510"},{"product_id":"minicat-51-wifd-f-3-5-spacecat","title":"MiniCat 51 WIFD f\/3.5 SpaceCat","description":"\u003cdiv\u003e\n\u003cmeta charset=\"utf-8\"\u003e\n\u003cp dir=\"ltr\"\u003e\u003cspan\u003eSpaceCat Version in Space Grey.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp dir=\"ltr\"\u003e\u003cspan\u003eThe MiniCat 51 is designed for photography enthusiasts who love wide-angle views. Its standout feature is an ultra-bright f\/3.5 aperture, allowing you to capture faint nebulae or comets in a very short time. (The f\/3.5 aperture lets in twice as much light as an f\/5 aperture.)\u003c\/span\u003e\u003cb\u003e\u003c\/b\u003e\u003c\/p\u003e\n\u003cp dir=\"ltr\"\u003e\u003cspan\u003eThe MiniCat uses the latest Petzval design with 6 lens elements, including 2 Super ED and lanthanum lenses to perfectly control chromatic aberration. It’s currently the only high-quality, short focal length 178mm f\/3.5 astrograph telescope available on the market.\u003c\/span\u003e\u003cb\u003e\u003c\/b\u003e\u003c\/p\u003e\n\u003cp dir=\"ltr\"\u003e\u003cspan\u003eThe MiniCat holds three unique patents, ensuring easy and perfect focusing along with coaxial image quality to prevent drawtube tilt issues caused by optical misalignment.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003ctable class=\"notion-collection-table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cdiv class=\"notion-collection-column-title\"\u003e\n\u003cdiv class=\"notion-collection-column-title-body\"\u003eLens Type\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\u003cspan class=\"notion-property notion-property-text\"\u003e6 Elements Petzval Design\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cdiv class=\"notion-collection-column-title\"\u003e\n\u003cdiv class=\"notion-collection-column-title-body\"\u003eFocal Length\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\u003cspan class=\"notion-property notion-property-text\"\u003e178 mm\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cdiv class=\"notion-collection-column-title\"\u003e\n\u003cdiv class=\"notion-collection-column-title-body\"\u003eDiameter\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\u003cspan class=\"notion-property notion-property-text\"\u003e51 mm\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cdiv class=\"notion-collection-column-title\"\u003e\n\u003cdiv class=\"notion-collection-column-title-body\"\u003eFocal Ratio\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\u003cspan class=\"notion-property notion-property-text\"\u003ef\/3.5\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cdiv class=\"notion-collection-column-title\"\u003e\n\u003cdiv class=\"notion-collection-column-title-body\"\u003eImage Circle\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\u003cspan class=\"notion-property notion-property-text\"\u003e43.2 mm\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cdiv class=\"notion-collection-column-title\"\u003e\n\u003cdiv class=\"notion-collection-column-title-body\"\u003eFocuser\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv class=\"notion-property-multi_select-item notion-item-purple\"\u003eWIFD R\u0026amp;P Focuser\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cdiv class=\"notion-collection-column-title\"\u003e\n\u003cdiv class=\"notion-collection-column-title-body\"\u003eFocuser Travel Length\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\u003cspan class=\"notion-property notion-property-text\"\u003e0-28 mm (Ruler to 40)\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cdiv class=\"notion-collection-column-title\"\u003e\n\u003cdiv class=\"notion-collection-column-title-body\"\u003eAdapter Included\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv class=\"notion-property-multi_select-item notion-item-green\"\u003eTilt Adjuster\u003c\/div\u003e\n\u003cdiv class=\"notion-property-multi_select-item notion-item-yellow\"\u003eRotator\u003c\/div\u003e\n\u003cdiv class=\"notion-property-multi_select-item notion-item-default\"\u003eM54 → M48 Adapter\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cdiv class=\"notion-collection-column-title\"\u003e\n\u003cdiv class=\"notion-collection-column-title-body\"\u003eOptional Flattener\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv class=\"notion-property-multi_select-item notion-item-default\"\u003eNo Flattener Required\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cdiv class=\"notion-collection-column-title\"\u003e\n\u003cdiv class=\"notion-collection-column-title-body\"\u003eCamera Format\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv class=\"notion-property-multi_select-item notion-item-yellow\"\u003eFull Frame (Compatible)\u003c\/div\u003e\n\u003cdiv class=\"notion-property-multi_select-item notion-item-blue\"\u003eAPS-C (Recommend)\u003c\/div\u003e\n\u003cdiv class=\"notion-property-multi_select-item notion-item-purple\"\u003eM4\/3\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cdiv class=\"notion-collection-column-title\"\u003e\n\u003cdiv class=\"notion-collection-column-title-body\"\u003eTotal Weight\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\u003cspan class=\"notion-property notion-property-text\"\u003e2.29 kg \/ 5.05 lbs\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cdiv class=\"notion-collection-column-title\"\u003e\n\u003cdiv class=\"notion-collection-column-title-body\"\u003eOTA Weight\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\u003cspan class=\"notion-property notion-property-text\"\u003e1.67 kg \/ 3.68 lbs\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cdiv class=\"notion-collection-column-title\"\u003e\n\u003cdiv class=\"notion-collection-column-title-body\"\u003eTube Length\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\u003cspan class=\"notion-property notion-property-text\"\u003e210 mm\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e\u003ca href=\"https:\/\/support.williamoptics.com\/products\/minicat-51-wifd\"\u003eOnline Manual\u003c\/a\u003e\u003c\/p\u003e","brand":"William Optics","offers":[{"title":"Default Title","offer_id":46056192606467,"sku":"T-C-MINI-SG","price":988.0,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/minicat-pers-1-TG.webp?v=1729559567"},{"product_id":"william-optics-ultra-cat-76","title":"UltraCat 76","description":"\u003cp dir=\"ltr\"\u003e\u003cspan\u003eThe \u003c\/span\u003e\u003cstrong\u003eUltra-Cat 76\u003c\/strong\u003e\u003cspan\u003e is a high-performance \u003c\/span\u003e\u003cspan\u003e76mm apochromatic refractor\u003c\/span\u003e\u003cspan\u003e, designed for \u003c\/span\u003e\u003cspan\u003eastrophotographers who demand \u003c\/span\u003e\u003cspan\u003eexceptional clarity and true color accuracy\u003c\/span\u003e\u003cspan\u003e.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp dir=\"ltr\"\u003e\u003cspan\u003eWith a\u003cstrong\u003e \u003c\/strong\u003e\u003c\/span\u003e\u003cstrong\u003e5-element advanced Petzval optical design\u003c\/strong\u003e\u003cspan\u003e, including \u003c\/span\u003e\u003cspan\u003esuper ED and lanthanum glass\u003c\/span\u003e\u003cspan\u003e, and a \u003c\/span\u003e\u003cspan\u003efast f\/4.8 focal ratio\u003c\/span\u003e\u003cspan\u003e, this telescope delivers \u003c\/span\u003e\u003cspan\u003estunningly sharp, flat-field images\u003c\/span\u003e\u003cspan\u003e across its \u003c\/span\u003e\u003cstrong\u003e50mm image circle\u003c\/strong\u003e\u003cspan\u003e. Optimized for \u003c\/span\u003e\u003cspan\u003eFull Frame, APS-C, and M4\/3 sensors\u003c\/span\u003e\u003cspan\u003e, it also offers \u003c\/span\u003e\u003cspan\u003ecompatibility with Medium Format cameras \u003c\/span\u003e\u003cspan\u003efor outstanding wide-field astrophotography.\u003c\/span\u003e\u003cb\u003e\u003c\/b\u003e\u003c\/p\u003e\n\u003ch3 dir=\"ltr\"\u003eKey Features:\u003cb\u003e\u003c\/b\u003e\n\u003c\/h3\u003e\n\u003cp role=\"presentation\" dir=\"ltr\"\u003e\u003cstrong\u003eAdvanced 5-Element Petzval Optics\u003cbr\u003e\u003c\/strong\u003e\u003cspan\u003eEliminates field curvature, ensuring sharp, edge-to-edge stars without additional flatteners.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp role=\"presentation\" dir=\"ltr\"\u003e\u003cstrong\u003e50mm Large Image Circle\u003c\/strong\u003e\u003cspan\u003e\u003cbr\u003e\u003c\/span\u003e\u003cspan\u003eFully supports Full Frame cameras, APS-C and M4\/3 sensors for optimal performance. Compatible with Medium Format.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp role=\"presentation\" dir=\"ltr\"\u003e\u003cstrong\u003eFast f\/4.8 Optics\u003c\/strong\u003e\u003cspan\u003e\u003cbr\u003e\u003c\/span\u003e\u003cspan\u003eSuperior light-gathering capability, enabling deep-sky imaging with shorter exposure times.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp role=\"presentation\" dir=\"ltr\"\u003e\u003cstrong\u003eWIFD (William’s Internal Focuser Design)\u003cbr\u003e\u003c\/strong\u003e\u003cspan\u003ePatented internal rack-and-pinion focuser ensures stable and precise focusing.\u003cbr\u003e\u003c\/span\u003e\u003cspan\u003eNo vignetting or balance issues — ideal for astrophotography.\u003cbr\u003e\u003c\/span\u003e\u003cspan\u003eCompatible with EAF (Electronic Automatic Focuser) for precision focus control.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp role=\"presentation\" dir=\"ltr\"\u003e\u003cstrong\u003eSensor Tilt Xterminator (STX) \u0026amp; Rotator\u003c\/strong\u003e\u003cspan\u003e\u003cbr\u003e\u003c\/span\u003e\u003cspan\u003eIntegrated tilt adjuster eliminates sensor misalignment, ensuring uniform image sharpness.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp role=\"presentation\" dir=\"ltr\"\u003e\u003cstrong\u003eNo Flattener Required\u003c\/strong\u003e\u003cspan\u003e\u003cbr\u003e\u003c\/span\u003e\u003cspan\u003eThe optical design naturally corrects field curvature, simplifying setup.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp role=\"presentation\" dir=\"ltr\"\u003e\u003cstrong\u003eAnti-Shrink Lens Cell Technology\u003c\/strong\u003e\u003cspan\u003e\u003cbr\u003e\u003c\/span\u003e\u003cspan\u003eReduces thermal expansion effects, maintaining perfect optical alignment in any climate.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp role=\"presentation\" dir=\"ltr\"\u003e\u003cstrong\u003ePatented Bahtinov Mask for Focusing\u003c\/strong\u003e\u003cspan\u003e\u003cbr\u003e\u003c\/span\u003e\u003cspan\u003eBuilt-in focusing aid ensures pinpoint star sharpness with ease.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp role=\"presentation\" dir=\"ltr\"\u003e\u003cstrong\u003ePremium Build \u0026amp; Ergonomic Design\u003cbr\u003e\u003c\/strong\u003e\u003cspan\u003eLightweight yet robust (4.31 kg \/ 9.5 lbs) construction\u003c\/span\u003e\u003cspan\u003e with a sleek anodized finish.\u003cbr\u003e\u003c\/span\u003e\u003cspan\u003ePatented handle bar design\u003c\/span\u003e\u003cspan\u003e for enhanced portability and ease of use.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eVersatile Camera Compatibility\u003c\/strong\u003e\u003cb id=\"docs-internal-guid-3d0f6d30-7fff-0dd9-1c91-b1df13dca75f\"\u003e\u003cspan\u003e\u003cbr\u003e\u003c\/span\u003e\u003c\/b\u003eSupports Canon EF, RF, Nikon F,Z, Sony E, Pentax K, MFT, and FUJI X mounts with the optional camera t-mounts (not included).\u003c\/p\u003e\n\u003ctable style=\"width: 100%;\" class=\"notion-collection-table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 37.3646%;\"\u003e\n\u003cdiv class=\"notion-collection-column-title\"\u003e\n\u003cdiv class=\"notion-collection-column-title-body\"\u003eLens Type\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/td\u003e\n\u003ctd style=\"width: 62.2744%;\"\u003e\u003cspan class=\"notion-property notion-property-text\"\u003e5 Elements Advanced Petzval Design\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 37.3646%;\"\u003e\n\u003cdiv class=\"notion-collection-column-title\"\u003e\n\u003cdiv class=\"notion-collection-column-title-body\"\u003eFocal Length\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/td\u003e\n\u003ctd style=\"width: 62.2744%;\"\u003e\u003cspan class=\"notion-property notion-property-text\"\u003e365 mm\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 37.3646%;\"\u003e\n\u003cdiv class=\"notion-collection-column-title\"\u003e\n\u003cdiv class=\"notion-collection-column-title-body\"\u003eDiameter\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/td\u003e\n\u003ctd style=\"width: 62.2744%;\"\u003e\u003cspan class=\"notion-property notion-property-text\"\u003e76 mm\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 37.3646%;\"\u003e\n\u003cdiv class=\"notion-collection-column-title\"\u003e\n\u003cdiv class=\"notion-collection-column-title-body\"\u003eFocal Ratio\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/td\u003e\n\u003ctd style=\"width: 62.2744%;\"\u003e\u003cspan class=\"notion-property notion-property-text\"\u003ef\/4.8\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 37.3646%;\"\u003e\n\u003cdiv class=\"notion-collection-column-title\"\u003e\n\u003cdiv class=\"notion-collection-column-title-body\"\u003eImage Circle\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/td\u003e\n\u003ctd style=\"width: 62.2744%;\"\u003e\u003cspan class=\"notion-property notion-property-text\"\u003e50 mm\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 37.3646%;\"\u003e\n\u003cdiv class=\"notion-collection-column-title\"\u003e\n\u003cdiv class=\"notion-collection-column-title-body\"\u003eFocuser\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/td\u003e\n\u003ctd style=\"width: 62.2744%;\"\u003e\n\u003cdiv class=\"notion-property-multi_select-item notion-item-purple\"\u003eWIFD R\u0026amp;P Focuser\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 37.3646%;\"\u003e\n\u003cdiv class=\"notion-collection-column-title\"\u003e\n\u003cdiv class=\"notion-collection-column-title-body\"\u003eFocuser Travel Length\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/td\u003e\n\u003ctd style=\"width: 62.2744%;\"\u003e\u003cspan class=\"notion-property notion-property-text\"\u003e0-20 mm (Ruler to 21mm)\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 37.3646%;\"\u003e\n\u003cdiv class=\"notion-collection-column-title\"\u003e\n\u003cdiv class=\"notion-collection-column-title-body\"\u003eAdapter Included\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/td\u003e\n\u003ctd style=\"width: 62.2744%;\"\u003e\n\u003cdiv class=\"notion-property-multi_select-item notion-item-green\"\u003eSensor Tilt Xterminator\u003c\/div\u003e\n\u003cdiv class=\"notion-property-multi_select-item notion-item-yellow\"\u003eRotator\u003c\/div\u003e\n\u003cdiv class=\"notion-property-multi_select-item notion-item-blue\"\u003eM54 Camera Adapter\u003c\/div\u003e\n\u003cdiv class=\"notion-property-multi_select-item notion-item-blue\"\u003eM48 Camera Adapter\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 37.3646%;\"\u003e\n\u003cdiv class=\"notion-collection-column-title\"\u003e\n\u003cdiv class=\"notion-collection-column-title-body\"\u003eOptional Flattener\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/td\u003e\n\u003ctd style=\"width: 62.2744%;\"\u003e\n\u003cdiv class=\"notion-property-multi_select-item notion-item-default\"\u003eNo Flattener Required\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 37.3646%;\"\u003e\n\u003cdiv class=\"notion-collection-column-title\"\u003e\n\u003cdiv class=\"notion-collection-column-title-body\"\u003eCamera Format\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/td\u003e\n\u003ctd style=\"width: 62.2744%;\"\u003e\n\u003cdiv class=\"notion-property-multi_select-item notion-item-yellow\"\u003eFull Frame\u003c\/div\u003e\n\u003cdiv class=\"notion-property-multi_select-item notion-item-blue\"\u003eAPS-C\u003c\/div\u003e\n\u003cdiv class=\"notion-property-multi_select-item notion-item-purple\"\u003eM4\/3\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 37.3646%;\"\u003e\n\u003cdiv class=\"notion-collection-column-title\"\u003e\n\u003cdiv class=\"notion-collection-column-title-body\"\u003eTotal Weight\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/td\u003e\n\u003ctd style=\"width: 62.2744%;\"\u003e\u003cspan class=\"notion-property notion-property-text\"\u003e4.98 kg \/ 10.98 lbs\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 37.3646%;\"\u003e\n\u003cdiv class=\"notion-collection-column-title\"\u003e\n\u003cdiv class=\"notion-collection-column-title-body\"\u003eOTA Weight\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/td\u003e\n\u003ctd style=\"width: 62.2744%;\"\u003e\u003cspan class=\"notion-property notion-property-text\"\u003e3.81 kg \/ 8.4 lbs\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 37.3646%;\"\u003e\n\u003cdiv class=\"notion-collection-column-title\"\u003e\n\u003cdiv class=\"notion-collection-column-title-body\"\u003eTube Length\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/td\u003e\n\u003ctd style=\"width: 62.2744%;\"\u003e\u003cspan class=\"notion-property notion-property-text\"\u003e363 mm - 415 mm\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/Diagram_UltraCat-76_SD_jpg.webp?v=1762976437\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003ca rel=\"noopener\" href=\"https:\/\/support.williamoptics.com\/products\/ultra-cat-76\" target=\"_blank\"\u003eOnline Manual\u003c\/a\u003e\u003c\/p\u003e","brand":"William Optics","offers":[{"title":"Default Title","offer_id":46636492095747,"sku":"T-C-76BR","price":2198.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/UC-76-pers-1.webp?v=1764820027"},{"product_id":"fluorostar-156-f-7-8-apo","title":"Fluorostar 156 f\/7.8 APO","description":"\u003cdl\u003e\n\u003cdt\u003e\n\u003cmeta charset=\"utf-8\"\u003e\n\u003cp\u003e\u003cem\u003e\u003cstrong\u003eNot stocked, available by special order only. Contact us to arrange purchase.\u003c\/strong\u003e\u003c\/em\u003e\u003c\/p\u003e\n\u003cp\u003eA premium apochromatic refractor designed for both avid stargazers and serious astrophotographers. This telescope features a 156mm aperture and a 1217mm focal length (f\/7.8), engineered for precision and durability. The Fluorostar 156 APO excels in delivering crisp, color-corrected visuals, thanks to its advanced triplet lens system incorporating FPL-53 glass and a Lanthanum element.\u003c\/p\u003e\n\u003cp\u003eRobust and reliable, the telescope boasts a sturdy steel objective cell that mitigates thermal expansion and maintains alignment under varying temperatures, ensuring consistent high performance. Aesthetically, it is available in three stunning finishes: vibrant red, elegant gold, and modern space grey, each complementing the sleek white tube.\u003c\/p\u003e\n\u003cp\u003eFor those eager to capture the cosmos, the Fluorostar 156 APO is equipped with a 3.7\" Rack \u0026amp; Pinion Focuser for seamless, precise focusing adjustments. This model comes standard with a unique Bahtinov Mask integrated into the dust cover for flawless focusing, three anodized CNC-made tube rings, and a robust Losmandy-type dovetail bar for secure mounting and enhanced versatility.\u003c\/p\u003e\n\u003cp\u003eWhether exploring celestial wonders or capturing them for posterity, the William Optics Fluorostar 156 APO stands as a superior choice for dedicated astronomers.\u003c\/p\u003e\n\u003c\/dt\u003e\n\u003cdt\u003e\u003c\/dt\u003e\n\u003cdt\u003eLens Type\u003c\/dt\u003e\n\u003cdd\u003eTriplet Apochromatic Prime Lens\u003c\/dd\u003e\n\u003cdt\u003eFocal Length\u003c\/dt\u003e\n\u003cdd\u003e1217 mm\u003c\/dd\u003e\n\u003cdt\u003eDiameter\u003c\/dt\u003e\n\u003cdd\u003e156 mm\u003c\/dd\u003e\n\u003cdt\u003eFocal Ratio\u003c\/dt\u003e\n\u003cdd\u003ef\/7.8\u003c\/dd\u003e\n\u003cdt\u003eImage circle\u003c\/dt\u003e\n\u003cdd\u003e\u0026gt; 44mm\u003c\/dd\u003e\n\u003cdt\u003eFocuser\u003c\/dt\u003e\n\u003cdd\u003e\n\u003cspan\u003e3.7\" R\u0026amp;P Focuser\u003c\/span\u003e\u003cspan\u003e \u003c\/span\u003e\u003cspan\u003eCompatible with EAF\u003c\/span\u003e\n\u003c\/dd\u003e\n\u003cdt\u003eFocus travel\u003c\/dt\u003e\n\u003cdd\u003e99 mm\u003c\/dd\u003e\n\u003cdt\u003eAdapter Included\u003c\/dt\u003e\n\u003cdd\u003e\n\u003cspan\u003eM92 Rotator\u003c\/span\u003e\u003cspan\u003e \u003c\/span\u003e\u003cspan\u003eM92 → 2\" RotoLock\u003c\/span\u003e\n\u003c\/dd\u003e\n\u003cdt\u003eOptional Flattener\u003c\/dt\u003e\n\u003cdd\u003e\n\u003cspan\u003eFLAT68III 1.0x\u003c\/span\u003e\u003cspan\u003e \u003c\/span\u003e\u003cspan\u003eFLAT7A 0.8x\u003c\/span\u003e\u003cspan\u003e \u003c\/span\u003e\u003cspan\u003eUltra Flat 0.79x\u003c\/span\u003e\u003cspan\u003e \u003c\/span\u003e\u003cspan\u003eFLAT8 0.72x\u003c\/span\u003e\n\u003c\/dd\u003e\n\u003cdt\u003eCamera Format\u003c\/dt\u003e\n\u003cdd\u003e\n\u003cspan\u003eFull Frame\u003c\/span\u003e\u003cspan\u003e \u003c\/span\u003e\u003cspan\u003eAPS-C\u003c\/span\u003e\u003cspan\u003e \u003c\/span\u003e\u003cspan\u003eM4\/3\u003c\/span\u003e\n\u003c\/dd\u003e\n\u003cdt\u003eTube Length\u003c\/dt\u003e\n\u003cdd\u003e1120 mm - 1330 mm\u003c\/dd\u003e\n\u003cdt\u003eOTA Weight\u003c\/dt\u003e\n\u003cdd\u003e17 kg \/ 37.48 lbs\u003c\/dd\u003e\n\u003c\/dl\u003e","brand":"William Optics","offers":[{"title":"Red","offer_id":47077073060099,"sku":null,"price":8998.0,"currency_code":"USD","in_stock":false},{"title":"Space Grey","offer_id":47077073289475,"sku":"A-F156TG-RP37","price":8998.0,"currency_code":"USD","in_stock":false},{"title":"Gold","offer_id":47077073322243,"sku":null,"price":8998.0,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/FLT-156-pers-1-grey.webp?v=1754682142"},{"product_id":"spacecat-51-wifd-f-4-9-iii","title":"SpaceCat 51 WIFD f\/4.9 III","description":"\u003cp\u003eProbably the very sharpest 250mm camera lens you will find!\u003cbr\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eNewest version uses the new William Optics Internal Focuser Design (WIFD)\u003c\/li\u003e\n\u003cli\u003e51mm quadruplet ED APO f\/4.9 (250mm fl)\u003c\/li\u003e\n\u003cli\u003eFPL53 \u0026amp; FPL51 glass \u003c\/li\u003e\n\u003cli\u003e5.25 lbs weight with rings, dovetail, handlebar.\u003c\/li\u003e\n\u003cli\u003e\u0026gt;43mm imaging circle with a flat field edge to edge for full-frame sensors\u003c\/li\u003e\n\u003cli\u003eDual Vixen and Arca Swiss Dovetail\u003c\/li\u003e\n\u003cli\u003eM48 thread to accept wide t-rings\/t-mounts\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/MANUAL-L-RC51RDIII.pdf?v=1702609052\" target=\"_blank\"\u003eRedCat 51 WIFD III Manual (pdf)\u003c\/a\u003e\u003c\/p\u003e\n\u003ch5\u003eFeatures\u003c\/h5\u003e\n\u003cp\u003e\u003cspan\u003eThe best value, highest quality 250mm lens you will find for your camera.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e51 mm lens, in a sleek Petzval design, using Synthetic Fluoride (FPL53 and FPL51) glass for a full-frame flat field image. The optical quality provides exceptional performance at a fast focal ratio of f\/4.9. \u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003eFilter Adapter allows use of 48mm filters. Focusing is made easy with a bahtinov mask integrated into the lens cap. \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch5\u003eSpecifications\u003c\/h5\u003e\n\u003ctable class=\"specifications\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth class=\"name\"\u003eAperture\u003c\/th\u003e\n\u003ctd class=\"data\"\u003e51 mm (2\")\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth class=\"name\"\u003eCamera\/Eyepiece Connection\u003c\/th\u003e\n\u003ctd class=\"data\"\u003eMale M48x0.75\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth class=\"name\"\u003eDawes Limit\u003c\/th\u003e\n\u003ctd class=\"data\"\u003e0.46 arcseconds\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth class=\"name\"\u003eFocal Length\u003c\/th\u003e\n\u003ctd class=\"data\"\u003e250 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth class=\"name\"\u003eFocal Ratio\u003c\/th\u003e\n\u003ctd class=\"data\"\u003ef\/4.9\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth class=\"name\"\u003eGlass Type\u003c\/th\u003e\n\u003ctd class=\"data\"\u003eFPL-53 and FPL-51\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth class=\"name\"\u003eHighest Useful Magnification\u003c\/th\u003e\n\u003ctd class=\"data\"\u003e102x\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth class=\"name\"\u003eLight Gathering Power\u003c\/th\u003e\n\u003ctd class=\"data\"\u003e53x\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth class=\"name\"\u003eLimiting Magnitude\u003c\/th\u003e\n\u003ctd class=\"data\"\u003e12.3\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth class=\"name\"\u003eOptical Design\u003c\/th\u003e\n\u003ctd class=\"data\"\u003ePetzval\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth class=\"name\"\u003eTube Color\u003c\/th\u003e\n\u003ctd class=\"data\"\u003eRed\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth class=\"name\"\u003eTube Diameter\u003c\/th\u003e\n\u003ctd class=\"data\"\u003e84mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth class=\"name\"\u003eTube Weight\u003c\/th\u003e\n\u003ctd class=\"data\"\u003e5.25 lbs\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth class=\"name\"\u003eDew Shield Outer Diameter (for soar filter sizing)\u003c\/th\u003e\n\u003ctd class=\"data\"\u003e84mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cmeta charset=\"utf-8\"\u003e\u003cspan\u003e\u003cstrong\u003eNote:\u003c\/strong\u003e You may need a riser block to use the RedCat 51 on some dual-saddle mounts. The focuser impacts the plate on the Celestron Advanced VX mount saddle that accepts both CG5 and CGE plates. The focus knob does not impact the Celestron CGX saddle, or the iOptron CEM70 and GEM45 \/ CEM40 dual-saddle plates. The focuser knob does not impact the SkyWatcher EQ6 and HEQ5 mounts.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch5\u003eIn The Box\u003c\/h5\u003e\n\u003cul\u003e\n\u003cli\u003eRedCat 51mm Telescope\u003c\/li\u003e\n\u003cli\u003eBahtinov Mask Cap\u003c\/li\u003e\n\u003cli\u003e210mm Dovetail\u003c\/li\u003e\n\u003cli\u003eUpgraded Mount Ring (with cat paw logo)\u003c\/li\u003e\n\u003cli\u003eSoft Carry Case\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e \u003c\/p\u003e","brand":"William Optics","offers":[{"title":"Default Title","offer_id":47405250019587,"sku":"L-RC51SGIII","price":888.0,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/Spacecat-51-perspective-1.webp?v=1762545837"},{"product_id":"pleiades-181","title":"Pleiades 181","description":"\u003cp\u003e\u003cem\u003e\u003cstrong\u003eContact us to inquire about ordering. This scope is not stocked, only available by special arrangement.\u003c\/strong\u003e\u003c\/em\u003e\u003c\/p\u003e\n\u003cp\u003eElevate your stargazing and astrophotography experience with the newly launched Pleiades 181 by William Optics, a masterpiece exclusively designed for imaging with medium format cameras. This state-of-the-art telescope boasts a substantial 181mm diameter and a 998mm focal length, encapsulated in a sleek, robust design with a 3.7” R\u0026amp;P focuser for precise control.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eKey Features:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigh-Performance Optics:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eThe Pleiades 181 features a seven-element, temperature-compensated lens system, ensuring minimal thermal distortion and a Strehl ratio minimum of 0.96 for sharp, clear images across a greater than 55mm image circle.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDesigned for Medium Format Cameras:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e\u003cspan\u003eEngineered specifically for medium format imaging, the Pleiades 181 is versatile in accommodating a variety of cameras. It comes equipped with three adapters for cameras with 48mm, 54mm, and 68mm threads, ensuring seamless compatibility and expansive celestial scene capture with unmatched clarity and color accuracy. This makes it an ideal choice for serious astrophotographers.\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUnique Cosmos Steering Wheel:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eA pioneering addition, the Cosmos Steering Wheel allows for effortless handling, rotating, and precise positioning of the telescope, enhancing both comfort and functional ease during prolonged observation sessions.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDurable and Portable:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eDespite its large aperture, the Pleiades 181 remains relatively portable with a weight of 33.07 lbs (OTA only) and 41.23 lbs fully equipped with ring, dovetail, and saddle. The retracted and extended lengths are 1231mm and 1496mm respectively, with a dew shield diameter of φ230mm.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eWhy Choose Pleiades 181?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eDesigned with the specific needs of advanced astrophotographers in mind, the Pleiades 181 is not just a telescope, but a dedicated imaging gateway to exploring the cosmos with exceptional detail and depth. Whether you are capturing distant galaxies or the intricate patterns of nebulae, the Pleiades 181 brings the universe closer to you with unparalleled precision.\u003c\/p\u003e\n\u003cp\u003eExplore the heavens with precision and elegance with the new Pleiades 181 from William Optics, where innovation meets the art of celestial imaging.\u003c\/p\u003e\n\u003ctable class=\"notion-collection-table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cdiv class=\"notion-collection-column-title\"\u003e\n\u003cdiv class=\"notion-collection-column-title-body\"\u003eLens Type\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\u003cspan class=\"notion-property notion-property-text\"\u003e7 Elements Astrograph Design\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cdiv class=\"notion-collection-column-title\"\u003e\n\u003cdiv class=\"notion-collection-column-title-body\"\u003eFocal Length\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\u003cspan class=\"notion-property notion-property-text\"\u003e998 mm\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cdiv class=\"notion-collection-column-title\"\u003e\n\u003cdiv class=\"notion-collection-column-title-body\"\u003eDiameter\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\u003cspan class=\"notion-property notion-property-text\"\u003e181 mm\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cdiv class=\"notion-collection-column-title\"\u003e\n\u003cdiv class=\"notion-collection-column-title-body\"\u003eFocal Ratio\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\u003cspan class=\"notion-property notion-property-text\"\u003ef\/5.5\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cdiv class=\"notion-collection-column-title\"\u003e\n\u003cdiv class=\"notion-collection-column-title-body\"\u003eImage Circle\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\u003cspan class=\"notion-property notion-property-text\"\u003e55 mm\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cdiv class=\"notion-collection-column-title\"\u003e\n\u003cdiv class=\"notion-collection-column-title-body\"\u003eFocuser\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv class=\"notion-property-multi_select-item notion-item-green\"\u003e3.7” R\u0026amp;P Focuser\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cdiv class=\"notion-collection-column-title\"\u003e\n\u003cdiv class=\"notion-collection-column-title-body\"\u003eFocuser Travel Length\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\u003cspan class=\"notion-property notion-property-text\"\u003e43 mm\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cdiv class=\"notion-collection-column-title\"\u003e\n\u003cdiv class=\"notion-collection-column-title-body\"\u003eAdapter Included\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv class=\"notion-property-multi_select-item notion-item-green\"\u003eTilt Adjuster\u003c\/div\u003e\n\u003cdiv class=\"notion-property-multi_select-item notion-item-yellow\"\u003eRotator\u003c\/div\u003e\n\u003cdiv class=\"notion-property-multi_select-item notion-item-blue\"\u003eM48 Camera Adapter\u003c\/div\u003e\n\u003cdiv class=\"notion-property-multi_select-item notion-item-blue\"\u003eM54 Camera Adapter\u003c\/div\u003e\n\u003cdiv class=\"notion-property-multi_select-item notion-item-blue\"\u003eM68 Camera Adapter\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cdiv class=\"notion-collection-column-title\"\u003e\n\u003cdiv class=\"notion-collection-column-title-body\"\u003eOptional Flattener\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv class=\"notion-property-multi_select-item notion-item-default\"\u003eNo Flattener Required\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cdiv class=\"notion-collection-column-title\"\u003e\n\u003cdiv class=\"notion-collection-column-title-body\"\u003eCamera Format\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv class=\"notion-property-multi_select-item notion-item-red\"\u003eMedium Format\u003c\/div\u003e\n\u003cdiv class=\"notion-property-multi_select-item notion-item-yellow\"\u003eFull Frame\u003c\/div\u003e\n\u003cdiv class=\"notion-property-multi_select-item notion-item-blue\"\u003eAPS-C\u003c\/div\u003e\n\u003cdiv class=\"notion-property-multi_select-item notion-item-purple\"\u003eM4\/3\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cdiv class=\"notion-collection-column-title\"\u003e\n\u003cdiv class=\"notion-collection-column-title-body\"\u003eTotal Weight\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\u003cspan class=\"notion-property notion-property-text\"\u003e18.7 kg \/ 41.23 lbs\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cdiv class=\"notion-collection-column-title\"\u003e\n\u003cdiv class=\"notion-collection-column-title-body\"\u003eOTA Weight\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\u003cspan class=\"notion-property notion-property-text\"\u003e15 kg \/ 33.07 lbs\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cdiv class=\"notion-collection-column-title\"\u003e\n\u003cdiv class=\"notion-collection-column-title-body\"\u003eTube Length\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\u003cspan class=\"notion-property notion-property-text\"\u003e1231 mm - 1496 mm\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003ca href=\"https:\/\/support.williamoptics.com\/products\/pleiades-181\" rel=\"noopener\" target=\"_blank\"\u003eOnline Manual\u003c\/a\u003e\u003c\/p\u003e","brand":"William Optics","offers":[{"title":"Default Title","offer_id":47426880209155,"sku":"T-P-181RD","price":19998.0,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/FLT-180-pers-1.webp?v=1762986598"},{"product_id":"ultra-cat-108","title":"UltraCat 108","description":"\u003ctable style=\"border-radius: 20px;\" width=\"100%\" bgcolor=\"black\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e \u003cimg style=\"display: block; margin-left: auto; margin-right: auto;\" alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/UC-108_Spec_icon_72206f52-d5f6-4489-9c08-e4f541c90eb6.avif?v=1764876354\"\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003ch4\u003eDescription:\u003c\/h4\u003e\n\u003cp\u003eThe William Optics Ultra-Cat 108 is a cutting-edge 108mm apochromatic refractor designed for astrophotographers who demand top-tier performance. Featuring a 5-element advanced Petzval optical design and a fast f\/4.8 focal ratio, it delivers breathtaking edge-to-edge clarity and vivid detail, making it perfect for capturing expansive celestial views. Its robust build, exceptional optics, and innovative features redefine the standard for astrophotography.\u003c\/p\u003e\n\u003ch3\u003eKey Features:\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eAdvanced 5-Element Petzval Design\u003cbr\u003e\u003c\/strong\u003eEliminates field curvature, providing sharp, flat-field images without requiring additional flatteners.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e60mm Superior Image Circle\u003cbr\u003e\u003c\/strong\u003eFully supports full-frame and medium-format cameras for wide-field and detailed astrophotography, outperforming standard 106mm telescopes.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eF\/4.8 Fast Optics\u003cbr\u003e\u003c\/strong\u003eOffers exceptional light-gathering capability for vibrant deep-sky photography.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWIFD (William’s Internal Focuser Design)\u003cbr\u003e\u003c\/strong\u003ePatented internal focuser ensures precise, stable, and hassle-free imaging, avoiding balance issues and eliminating vignetting.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eAnti-Shrink Lens Cell Technology\u003cbr\u003e\u003c\/strong\u003eMinimizes thermal expansion and contraction, maintaining perfect optical alignment in any environment.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eSensor Tilt Corrector\u003cbr\u003e\u003c\/strong\u003eIntegrated and patented design eliminates distortion, optimizing sharpness and detail for professional-level results.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eBuilt-In Patented Bahtinov Mask\u003cbr\u003e\u003c\/strong\u003eSimplifies focusing for pinpoint precision, a feature that sets it apart from competitors.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003ePatented Handle Bar Design\u003cbr\u003e\u003c\/strong\u003eCombines ergonomic usability with enhanced portability.\u003cstrong\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003ctable class=\"notion-collection-table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cdiv class=\"notion-collection-column-title\"\u003e\n\u003cdiv class=\"notion-collection-column-title-body\"\u003eLens Type\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\u003cspan class=\"notion-property notion-property-text\"\u003e5 Elements Advanced Petzval Design\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cdiv class=\"notion-collection-column-title\"\u003e\n\u003cdiv class=\"notion-collection-column-title-body\"\u003eFocal Length\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\u003cspan class=\"notion-property notion-property-text\"\u003e518 mm\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cdiv class=\"notion-collection-column-title\"\u003e\n\u003cdiv class=\"notion-collection-column-title-body\"\u003eDiameter\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\u003cspan class=\"notion-property notion-property-text\"\u003e108 mm\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cdiv class=\"notion-collection-column-title\"\u003e\n\u003cdiv class=\"notion-collection-column-title-body\"\u003eFocal Ratio\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\u003cspan class=\"notion-property notion-property-text\"\u003ef\/4.8\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cdiv class=\"notion-collection-column-title\"\u003e\n\u003cdiv class=\"notion-collection-column-title-body\"\u003eImage Circle\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\u003cspan class=\"notion-property notion-property-text\"\u003e60 mm\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cdiv class=\"notion-collection-column-title\"\u003e\n\u003cdiv class=\"notion-collection-column-title-body\"\u003eFocuser\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv class=\"notion-property-multi_select-item notion-item-purple\"\u003eWIFD R\u0026amp;P Focuser\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cdiv class=\"notion-collection-column-title\"\u003e\n\u003cdiv class=\"notion-collection-column-title-body\"\u003eFocuser Travel Length\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\u003cspan class=\"notion-property notion-property-text\"\u003e0-30 mm (Ruler to 31mm)\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cdiv class=\"notion-collection-column-title\"\u003e\n\u003cdiv class=\"notion-collection-column-title-body\"\u003eAdapter Included\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv class=\"notion-property-multi_select-item notion-item-green\"\u003eSensor Tilt Xterminator\u003c\/div\u003e\n\u003cdiv class=\"notion-property-multi_select-item notion-item-yellow\"\u003eRotator\u003c\/div\u003e\n\u003cdiv class=\"notion-property-multi_select-item notion-item-default\"\u003eM79 → M68 Adapter\u003c\/div\u003e\n\u003cdiv class=\"notion-property-multi_select-item notion-item-default\"\u003eM79 → M54 Adapter\u003c\/div\u003e\n\u003cdiv class=\"notion-property-multi_select-item notion-item-default\"\u003eM79 → M48 Adapter\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cdiv class=\"notion-collection-column-title\"\u003e\n\u003cdiv class=\"notion-collection-column-title-body\"\u003eOptional Flattener\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv class=\"notion-property-multi_select-item notion-item-default\"\u003eNo Flattener Required\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cdiv class=\"notion-collection-column-title\"\u003e\n\u003cdiv class=\"notion-collection-column-title-body\"\u003eCamera Format\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv class=\"notion-property-multi_select-item notion-item-red\"\u003eMedium Format\u003c\/div\u003e\n\u003cdiv class=\"notion-property-multi_select-item notion-item-yellow\"\u003eFull Frame\u003c\/div\u003e\n\u003cdiv class=\"notion-property-multi_select-item notion-item-blue\"\u003eAPS-C\u003c\/div\u003e\n\u003cdiv class=\"notion-property-multi_select-item notion-item-purple\"\u003eM4\/3\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cdiv class=\"notion-collection-column-title\"\u003e\n\u003cdiv class=\"notion-collection-column-title-body\"\u003eOTA Weight\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\u003cspan class=\"notion-property notion-property-text\"\u003e7.82 kg \/ 17.24 lbs\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cdiv class=\"notion-collection-column-title\"\u003e\n\u003cdiv class=\"notion-collection-column-title-body\"\u003eWeight with Rings\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\u003cspan class=\"notion-property notion-property-text\"\u003e20.6 lbs\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cdiv class=\"notion-collection-column-title\"\u003e\n\u003cdiv class=\"notion-collection-column-title-body\"\u003eTube Length\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\u003cspan class=\"notion-property notion-property-text\"\u003e512.9 mm - 617.9 mm\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/FOV-108-Ultra-cat.webp?v=1765058620\"\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/UC108-gallery-04.webp?v=1765058620\"\u003eNorth America Nebula by \u003cmeta charset=\"utf-8\"\u003e\u003ca href=\"https:\/\/app.astrobin.com\/i\/71eouy\" class=\"link\"\u003eDavesView\u003c\/a\u003e\u003cbr\u003eUltra-Cat 108 with ASI6200MM Pro Full Frame\u003c\/p\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/UC108-gallery-03.webp?v=1765058620\"\u003e\u003cspan\u003eIC 1396 Elephant's Trunk Nebula by \u003c\/span\u003e\u003ca href=\"https:\/\/app.astrobin.com\/i\/zhk29y\" class=\"link\"\u003eYungshih Lee\u003c\/a\u003e\u003cbr\u003e\u003cmeta charset=\"utf-8\"\u003eUltra-Cat 108 with ASI2600MM Pro\u003c\/p\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/UC108-gallery-02.webp?v=1765058620\"\u003e\u003cmeta charset=\"utf-8\"\u003eMarkarian's Chain and M87, M88 by \u003ca href=\"https:\/\/app.astrobin.com\/u\/yslee0110?i=dej6lp\" class=\"link\"\u003eYungshih Lee\u003c\/a\u003e\u003cbr\u003e\u003cmeta charset=\"utf-8\"\u003eUltra-Cat 108 with ASI2600MC DUO\u003c\/p\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/UC108-gallery-01.webp?v=1765058620\"\u003eLDN 43 Cosmic Bat Nebula by \u003ca href=\"https:\/\/app.astrobin.com\/u\/yslee0110?i=jnlarq#gallery\" class=\"link\"\u003eYungshih Lee\u003c\/a\u003e\u003cbr\u003eUltra-Cat 108 with ASI2600MC DUO\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/Screenshot2025-12-06at3.02.35PM.png?v=1765058589\" alt=\"\"\u003e\u003c\/p\u003e","brand":"William Optics","offers":[{"title":"Default Title","offer_id":47492000612611,"sku":"T-C-108BR","price":3998.0,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/Cat-108-1-preorder_jpg.webp?v=1753683479"},{"product_id":"ultra-cat-56","title":"UltraCat 56","description":"\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/597034860_1338814758258413_2154915975305121231_n.jpg?v=1766381138\" alt=\"\"\u003e\u003c\/p\u003e\n\u003cp\u003eThe Ultracat 56 offers an optical upgrade from the venerable RedCat 51, with a superior 5-element advanced Petzval design delivering improved performance out to the corners of full frame sensors. The RMS spot size all the way out to the corners represents a 41% improvement vs the RedCat 51, with tighter RMS across the field for improved performance with high megapixel sensors.\u003c\/p\u003e\n\u003cp\u003eAdditional features like the built-in sensor tilt exterminator and camera angle adjuster allow for easy adjustments without removing the camera.\u003c\/p\u003e\n\u003ctable width=\"100%\" style=\"width: 100%; height: 312.188px;\"\u003e\n\u003ctbody\u003e\n\u003ctr style=\"height: 292.594px;\"\u003e\n\u003ctd style=\"width: 50%; height: 292.594px;\"\u003e\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/C-108-stx.webp?v=1765822702\"\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 50%; height: 292.594px;\"\u003e\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/C-108-caa.webp?v=1765822704\"\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"vertical-align: top;\"\u003e\n\u003cmeta charset=\"utf-8\"\u003e\n\u003ch3 class=\"h4\"\u003eSensor Tilt Xterminator (STX)\u003c\/h3\u003e\n\u003cp\u003eThe built-in STX allows quick side-access tilt adjustments without removing the camera.\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd style=\"vertical-align: top;\"\u003e\n\u003ch3\u003eCamera Angle Rotator\u003c\/h3\u003e\n\u003cp\u003eCorrect any angular discrepancies, and get the perfect angle on your images.\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch1 style=\"text-align: center;\"\u003eSpecifications\u003c\/h1\u003e\n\u003ctable class=\"notion-collection-table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cdiv class=\"notion-collection-column-title\"\u003e\n\u003cdiv class=\"notion-collection-column-title-body\"\u003eLens Type\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\u003cspan class=\"notion-property notion-property-text\"\u003e5 Elements Advanced Petzval Design\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cdiv class=\"notion-collection-column-title\"\u003e\n\u003cdiv class=\"notion-collection-column-title-body\"\u003eFocal Length\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\u003cspan class=\"notion-property notion-property-text\"\u003e269 mm\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cdiv class=\"notion-collection-column-title\"\u003e\n\u003cdiv class=\"notion-collection-column-title-body\"\u003eDiameter\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\u003cspan class=\"notion-property notion-property-text\"\u003e56 mm\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cdiv class=\"notion-collection-column-title\"\u003e\n\u003cdiv class=\"notion-collection-column-title-body\"\u003eFocal Ratio\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\u003cspan class=\"notion-property notion-property-text\"\u003ef\/4.8\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cdiv class=\"notion-collection-column-title\"\u003e\n\u003cdiv class=\"notion-collection-column-title-body\"\u003eImage Circle\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\u003cspan class=\"notion-property notion-property-text\"\u003e50 mm\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cdiv class=\"notion-collection-column-title\"\u003e\n\u003cdiv class=\"notion-collection-column-title-body\"\u003eFocuser\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv class=\"notion-property-multi_select-item notion-item-purple\"\u003eWIFD R\u0026amp;P Focuser\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cdiv class=\"notion-collection-column-title\"\u003e\n\u003cdiv class=\"notion-collection-column-title-body\"\u003eFocuser Travel Length\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\u003cspan class=\"notion-property notion-property-text\"\u003e0-30 mm\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cdiv class=\"notion-collection-column-title\"\u003e\n\u003cdiv class=\"notion-collection-column-title-body\"\u003eAdapter Included\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv class=\"notion-property-multi_select-item notion-item-green\"\u003eSensor Tilt Xterminator\u003c\/div\u003e\n\u003cdiv class=\"notion-property-multi_select-item notion-item-yellow\"\u003eRotator\u003c\/div\u003e\n\u003cdiv class=\"notion-property-multi_select-item notion-item-blue\"\u003eM54 Camera Adapter\u003c\/div\u003e\n\u003cdiv class=\"notion-property-multi_select-item notion-item-blue\"\u003eM48 Camera Adapter\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cdiv class=\"notion-collection-column-title\"\u003e\n\u003cdiv class=\"notion-collection-column-title-body\"\u003eOptional Flattener\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv class=\"notion-property-multi_select-item notion-item-default\"\u003eNo Flattener Required\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cdiv class=\"notion-collection-column-title\"\u003e\n\u003cdiv class=\"notion-collection-column-title-body\"\u003eCamera Format\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv class=\"notion-property-multi_select-item notion-item-yellow\"\u003eFull Frame\u003c\/div\u003e\n\u003cdiv class=\"notion-property-multi_select-item notion-item-blue\"\u003eAPS-C\u003c\/div\u003e\n\u003cdiv class=\"notion-property-multi_select-item notion-item-purple\"\u003eM4\/3\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cdiv class=\"notion-collection-column-title\"\u003e\n\u003cdiv class=\"notion-collection-column-title-body\"\u003eTotal Weight\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\u003cspan class=\"notion-property notion-property-text\"\u003e3.21 kg \/ 7.08 lbs\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cdiv class=\"notion-collection-column-title\"\u003e\n\u003cdiv class=\"notion-collection-column-title-body\"\u003eOTA Weight\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\u003cspan class=\"notion-property notion-property-text\"\u003e2.56 kg \/ 5.64 lbs\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cdiv class=\"notion-collection-column-title\"\u003e\n\u003cdiv class=\"notion-collection-column-title-body\"\u003eTube Length\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\u003cspan class=\"notion-property notion-property-text\"\u003e296.3 mm - 348.3 mm\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch1 style=\"text-align: center;\"\u003eOptical Performance\u003c\/h1\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/UltraCat56-SpotDiagram.jpg?v=1765822098\" alt=\"\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/UltraCat56-LongitudinalAberration.jpg?v=1765822403\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003ca rel=\"noopener\" href=\"https:\/\/support.williamoptics.com\/products\/ultra-cat-56\" target=\"_blank\"\u003eProduct Manual\u003c\/a\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e","brand":"William Optics","offers":[{"title":"Default Title","offer_id":47536327131395,"sku":"T-C-56BR","price":1398.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/UC56-pers-1.webp?v=1772040322"},{"product_id":"fma180-pro","title":"FMA180 Pro","description":"\u003cp\u003e\u003cmeta charset=\"UTF-8\"\u003e\u003cspan\u003eThe objective lens features a sextuplet air-spaced APO design and includes two pieces of ED glass, providing excellent correction of chromatic aberration. Specially optimized for astrophotography. Compared to FMA180, FMA180 pro adds a finder base and a 360° rotator. The focuser is designed as internal focusing which promotes its stability and ensures its performance in use as a delicate, high-quality, and compact astrograph.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eThe FMA180 pro comes with an M48 adapter at the rear end, and the back focus is the standard 55mm. The multifunctional base can not only be used for astrophotography but also be mounted onto other telescopes' finder bases as a finder scope after the Vixen dovetail plate is detached.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eIn a word, FMA180 pro is a compact astrograph for astrophotography with more integrated functions and a more dedicated design.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/a3c4772f-85a7-40d3-bcad-c102f4688661.jpg?v=1766092675\" alt=\"\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/fma180specs.png?v=1766092518\" alt=\"\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/73e5b648-a1f4-4767-a392-0056ce245993.jpg?v=1766092673\" alt=\"\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/88f6104e-38df-44e7-a909-c8fe305ada5c.jpg?v=1766092518\" alt=\"\" style=\"margin-bottom: 1rem;\"\u003e\u003cspan\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003ch1 class=\"e_h3-72 s_summary\" style=\"text-align: center;\"\u003eSpecifications\u003c\/h1\u003e\n\u003cdiv class=\"e_richText-73 s_title clearfix response-transition\"\u003e\n\u003ctable align=\"center\" cellspacing=\"0\" width=\"84.20%\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd colspan=\"3\"\u003e\n\u003cp\u003e\u003cstrong\u003eFMA180 pro Parameters\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eAperture size\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd colspan=\"2\"\u003e\n\u003cp\u003e\u003cstrong\u003e40mm\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eFocal length\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd colspan=\"2\"\u003e\n\u003cp\u003e\u003cstrong\u003e180mm\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eFocal ratio\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd colspan=\"2\"\u003e\n\u003cp\u003e\u003cstrong\u003ef\/4.5\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eObjective lens\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd colspan=\"2\"\u003e\u003cstrong\u003esextuplet with two ED glasses air-spaced APO\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eBack focus\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd colspan=\"2\"\u003e\u003cstrong\u003e55mm\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eImage circle\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd colspan=\"2\"\u003e\n\u003cp\u003e\u003cstrong\u003e44mm\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eTotal length\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd colspan=\"2\"\u003e\n\u003cp\u003e\u003cb\u003e167.5mm\u003c\/b\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eTotal Weight (Including tube ring\u0026amp;dovetail plate）\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd colspan=\"2\"\u003e\n\u003cp\u003e\u003cstrong\u003e0.8kg\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eRear-end thread type\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd colspan=\"2\"\u003e\u003cstrong\u003eM48×0.75 (built-in 2\" filter thread)\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eStandard package items\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd colspan=\"2\"\u003e\u003cstrong\u003ean 180pro OTA, an instruction manual\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e\u003cimg\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/FMA180Optics.jpg?v=1766092801\" alt=\"\"\u003e\u003c\/p\u003e\n\u003ch1\u003eGallery\u003c\/h1\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cstrong\u003e\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/b9a0e27b-81a3-48f4-a29b-38f4edb05501_jpg.webp?v=1766092924\"\u003e\u003c\/strong\u003eNicola Bugin\u0026amp;Giovanni Pasquetto  |  M42 and Horse head nebula  |  ASKAR FMA180PRO+ZWO ASI294MM\/MC\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/56f75581-2010-4c5f-b0d3-bb5c3c5a20ea.jpg?v=1766093001\" alt=\"\"\u003e\u003cmeta charset=\"UTF-8\"\u003eRosette Nebula  |  ASKAR FMA180pro+zwo 294mc\u003c\/p\u003e\n\u003c\/div\u003e","brand":"Askar","offers":[{"title":"Default Title","offer_id":47562764386563,"sku":null,"price":439.0,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/e968069c-6ef5-4744-9a1a-dd283c3bdf79_png.webp?v=1766092518"},{"product_id":"60f-flat-field","title":"60F Flat-Field","description":"\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/dfa8bbf2-0d0b-4b9b-88d9-eb01af2debd4-2.jpg?v=1766105047\" alt=\"\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/Screenshot_2025-12-18_at_5.42.29_PM.png?v=1766105086\" alt=\"\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eThe Askar 60F is an OTA with an aperture of 60 mm, a focal length of 408mm, and a native focal ratio of F6.8, designed for astronomy enthusiasts who prioritize portability and high image quality.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eThe Askar 60F features a quadruplet optical lens design (three front elements and one rear element), including one piece of ED glass, which can effectively reduce chromatic aberration. The Askar 60F supports 44mm full-frame imaging with great performance of the surrounding star points.  \u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/1eb920d1-fcfb-45b1-b5cc-46c71dd25832.jpg?v=1766105153\" alt=\"\"\u003e\u003c\/span\u003e\u003cspan\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cmeta charset=\"UTF-8\"\u003eWith its built-in field flattener, the Askar 60F eliminates the need for an additional flattener and complex back-focus calculations. Simply attach your camera, achieve focus, and you’re ready to capture images, making astrophotography simpler and more enjoyable. \u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/Screenshot_2025-12-18_at_5.49.00_PM.png?v=1766105370\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eThe Askar 60F OTA weighs only 2.5kg, and the gross weight is 3kg (including the tube rings and dovetail plate). It is compact and lightweight, making it easy to carry for observing or astrophotography—wherever your exploration takes you.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eThe Askar 60F is designed for both visual observation and photography. It comes with a photographic extension tube featuring a built-in 2\" filter thread and has M48×0.75 and M54×0.75 adapters, making it compatible with DSLRs and astronomical cameras for quick connection and instant shooting. \u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/bfd92ab9-f018-4bba-a1e7-486c93ca205c.jpg?v=1766105441\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eThe mechanical design of the Askar 60F minimizes hidden usage costs and ensures a smooth experience.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eThe Askar 60F features a retractable dew shield, further reducing overall length and enhancing portability. The inside of the tube is pasted with matting felt to eliminate stray light better, while the exterior sports a sleek blue-and-white color scheme with high-quality CNC machining and paint finish.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eOn the handle bar of Askar 60F, it has a finder base slot. Besides, there are two finder bases on both sides of the focuser, which not only eliminates the need for disassembling when changing the position of the finder scope but also provides additional mounting positions for other astronomical accessories.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eIn terms of the focuser, the Askar 60F is equipped with a dual-speed R\u0026amp;P 2.4-inch rigid focuser, offering 1:10 fine-tuning. The fine adjustment knob has an anti-slip cover, and the rear features a 360° scale rotator for precise angle adjustment.  \u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eThe dovetail plate is a 230mm standard Vixen-style plate, with 1\/4\" and 3\/8\" screw holes, allowing direct connection to a tripod.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eOffering professional-grade performance at an entry-level price, the Askar 60F is your ideal companion for exploring the cosmos and capturing nature’s beauty. Travel light, discover more—start your journey with Askar 60F! \u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/f9e5b5ae-a6bb-4b98-8fb4-4d2bd3396bf2.jpg?v=1766105531\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/1d1ee564-86ed-4386-a4fd-d0163321c49c_jpeg.webp?v=1766105531\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/6f1f8780-9f3a-47b6-bf96-f1422696f030_jpg.webp?v=1766105529\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cfigure class=\"table\"\u003e\n\u003ctable class=\"ck-table-resized\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"text-align: center;\" colspan=\"3\" class=\"responsive-title\"\u003e\u003cstrong\u003eParameters\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eAperture size\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd colspan=\"2\"\u003e\u003cstrong\u003e60mm\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eFocal length\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd colspan=\"2\"\u003e\u003cstrong\u003e408mm\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eFocal ratio\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd colspan=\"2\"\u003e\u003cstrong\u003ef\/6.8\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eObjective lens\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd colspan=\"2\"\u003e\u003cstrong\u003eQuadruplet air-spaced APO(including one ED glass)\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eImage circle\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd colspan=\"2\"\u003e\u003cstrong\u003e44mm\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eMaximum accessory connection (with the focuser fully retreated)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\n\u003cstrong\u003eImaging mode: \u003c\/strong\u003e \u003cbr\u003e\u003cstrong\u003e81mm (from the base of M48×0.75 male thread） \u003c\/strong\u003e \u003cbr\u003e\u003cstrong\u003e99mm（from the base of M54×0.75 male thread)\u003c\/strong\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\n\u003cstrong\u003eObserving mode: \u003c\/strong\u003e \u003cbr\u003e\u003cstrong\u003e120mm（from the end of 1.25\" eyepiece holder） \u003c\/strong\u003e \u003cbr\u003e\u003cstrong\u003e130mm（from the end of 2\" eyepiece holder）\u003c\/strong\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eMinimum accessory connection (with the focuser fully extended)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\n\u003cstrong\u003eImaging mode: \u003c\/strong\u003e \u003cbr\u003e\u003cstrong\u003e31mm (from the base of M48×0.75 male thread） \u003c\/strong\u003e \u003cbr\u003e\u003cstrong\u003e49mm（from the base of M54×0.75 male thread)\u003c\/strong\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\n\u003cstrong\u003eObserving mode: \u003c\/strong\u003e \u003cbr\u003e\u003cstrong\u003e70mm（from the end of 1.25\" eyepiece holder） \u003c\/strong\u003e \u003cbr\u003e\u003cstrong\u003e80mm（from the end of 2\" eyepiece holder）\u003c\/strong\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eTotal length\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd colspan=\"2\"\u003e\n\u003cstrong\u003e289mm(including 1.25\" adapter as dew shield contracted） \u003c\/strong\u003e \u003cbr\u003e\u003cstrong\u003e323mm(including 1.25\" adapter as dew shield fully stretched） \u003c\/strong\u003e \u003cbr\u003e\u003cstrong\u003e336mm(including the photographic adapter as dew shield contracted） \u003c\/strong\u003e \u003cbr\u003e\u003cstrong\u003e369mm(including the photographic adapter as dew shield fully stretched）\u003c\/strong\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eFocuser travel length\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd colspan=\"2\"\u003e\u003cstrong\u003e50mm\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eNet weight\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd colspan=\"2\"\u003e\u003cstrong\u003e2.36kg\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eGross weight (Including tube ring\u0026amp;dovetail plate)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd colspan=\"2\"\u003e\u003cstrong\u003e2.86kg\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eRear-end thread type\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd colspan=\"2\"\u003e\n\u003cstrong\u003eM64×0.75-M54×0.75 \u003c\/strong\u003e \u003cbr\u003e\u003cstrong\u003eM54×0.75-M54×0.75 \u003c\/strong\u003e \u003cbr\u003e\u003cstrong\u003eM54×0.75-M48×0.75  (with M48×0.75 filter thread)\u003c\/strong\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eStandard package items\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd colspan=\"2\"\u003e\u003cstrong\u003e A 60F OTA，a pair of tube rings, a handle, a 230mm Vixen dovetail plate,a set of photographic adapters\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/figure\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cstrong\u003eProduct Size Diagrams\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/Screenshot_2025-12-24_at_3.14.47_PM.png?v=1766614561\" alt=\"\"\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/Screenshot_2025-12-24_at_3.16.39_PM.png?v=1766614632\" alt=\"\"\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/Screenshot_2025-12-24_at_3.16.52_PM.png?v=1766614632\" alt=\"\"\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cstrong\u003e60F Connection Diagram\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/3a4ccbd6-82bd-426b-a686-67e2262fa975_jpg.webp?v=1766614807\"\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cstrong\u003eThe Locking Screw Position Diagram\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/a859e8f9-aad8-44ea-97e7-b667b77bb291_jpg.webp?v=1766614920\"\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cstrong\u003eElectronic Focuser Assembly Diagram\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/Screenshot_2025-12-24_at_3.26.18_PM.png?v=1766615247\"\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cimg\u003e\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/Screenshot_2025-12-24_at_3.26.41_PM.png?v=1766615290\"\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/Screenshot_2025-12-24_at_3.26.53_PM.png?v=1766615327\"\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/Screenshot_2025-12-24_at_3.27.05_PM.png?v=1766615357\"\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cstrong\u003eOptical Path Diagram\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/4e404fdd-a0cd-4dee-94a8-dd323ee7b67b_jpg.webp?v=1766615063\"\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cstrong\u003eSpot Diagram\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/ce20716a-504a-4d0b-8479-0b5157d2bf41_jpg.webp?v=1766615108\"\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cstrong\u003eImages\u003c\/strong\u003e\u003cstrong\u003e\u003c\/strong\u003e\u003cstrong\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cstrong\u003e\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/ba3a7ae5-cf89-4b02-9b98-d7743d71f0d5_jpg.webp?v=1766615990\"\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cmeta charset=\"UTF-8\"\u003eM8+M20   |  ASKAR 60F + ZWO ASI 2600MC\u003c\/p\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cstrong\u003e\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/b0a928fa-20f9-4512-bae0-5ec69886fff5_jpg.webp?v=1766615987\"\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cmeta charset=\"UTF-8\"\u003eM45   |  ssszzz  |  ASKAR 60F + ZWO ASI 2600MC\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e","brand":"Askar","offers":[{"title":"Default Title","offer_id":47563155996931,"sku":"60F","price":499.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/60F-angle.jpg?v=1766293732"},{"product_id":"91f-flat-field","title":"91F Flat-Field","description":"\u003cp\u003e\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/a3df0069-a893-4f9b-b959-77540ba5aeb6.jpg?v=1767220843\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/ICONS_91f_ZS.jpg?v=1781116998\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eThe Askar 91F is an OTA with an aperture of 91mm, a focal length of 609mm, and a native focal ratio of F6.7.  \u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eThe optical design of the Askar 91F features a four-element configuration (three elements in the front and one in the rear), including one piece of ED glass， which can effectively reduce chromatic aberration.The Askar 91F supports 44mm full-frame imaging with great performance of the surrounding star points. \u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eThe Askar 91F is a self-flattened design that allows users to avoid calculating the back focus and buying additional flatteners. After attaching the imaging accessories, users can directly use it for shooting after the OTA is in focus. This further reduces the cost and improves the pleasure of shooting. \u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/Screenshot_2025-12-31_at_3.42.50_PM.png?v=1767220990\"\u003e\u003c\/span\u003e\u003cspan\u003e\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/b8f20973-5d5c-4493-975a-e06d05b020df.jpg?v=1767221070\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eThe Askar 91F strikes a balance between practicality and versatility while achieving lightweight portability through its compact design.The OTA weighs just 3.92kg, with a gross weight of 4.52kg (including the tube rings and dovetail plate).  \u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eThe Askar 91F is versatile in its use, allowing for both visual observation and astrophotography.     \u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/3abcc63f-9690-4a70-ae61-dcdaec24c590.jpg?v=1767221191\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003ch4\u003e\u003cspan\u003eExamples of Magnification\u003c\/span\u003e\u003c\/h4\u003e\n\u003cp\u003e\u003cspan\u003e\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/d60045b0-2ff2-4e43-9fbe-8740e10fd73e.jpg?v=1767221293\"\u003e\u003c\/span\u003e\u003cspan\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cmeta charset=\"UTF-8\"\u003eThe Askar 91F comes standard with a photographic extension tube with a built-in 2-inch filter thread for easy shooting connections, providing M48×0.75 \u0026amp; M54×0.75 adapters to accommodate various DSLR cameras and professional astronomical cameras, meeting diverse imaging needs.  \u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eThe mechanical design of the Askar 91F itself adheres to Askar's consistent philosophy of taking into account the user's habits and minimizing the user's invisible costs.\u003c\/span\u003e\u003cspan\u003e \u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eThe Askar 91F features a retractable dew shield, further reducing overall length and enhancing portability.The inside of the tube is pasted with matting felt to better eliminate stray light, while the exterior sports a sleek blue-and-white color scheme with high-quality CNC machining and paint finish.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eThe Askar 91F’s handle is 130mm long and has a finder base slot. Besides, there are two finder bases on both sides of the focuser, which not only eliminates the need for disassembling when changing the position of the finder scope but also provides additional mounting positions for other astronomical accessories.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eIn terms of the focuser, the Askar 91F is equipped with a dual-speed R\u0026amp;P 3-inch rigid focuser, which has a 1:10 fine adjustment and a 360° scaled rotator at the rear end for precise angle adjustment.The 230mm Vixen-style dovetail plate includes 1\/4\" and 3\/8\" screw holes for direct tripod mounting.  \u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/Screenshot_2025-12-31_at_3.52.27_PM.png?v=1767221563\" alt=\"\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eThe rear interface of the Askar 91F includes both 2-inch and 1.25-inch adapters, enabling compatibility with a wide range of astronomical accessories.  \u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eWhether for deep-sky astrophotography, planetary observation, or birdwatching and travel, the 91F is your ideal companion for exploring the world. \u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cstrong\u003eSpecifications\u003c\/strong\u003e\u003c\/p\u003e\n\u003cfigure class=\"table\"\u003e\n\u003ctable class=\"ck-table-resized\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd class=\"responsive-title\" colspan=\"3\"\u003e\u003cstrong\u003eParameters\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eAperture size\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd colspan=\"2\"\u003e\u003cstrong\u003e91mm\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eFocal length\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd colspan=\"2\"\u003e\u003cstrong\u003e609mm\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eFocal ratio\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd colspan=\"2\"\u003e\u003cstrong\u003ef\/6.7\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eObjective lens\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd colspan=\"2\"\u003e\u003cstrong\u003eQuadruplet air-spaced APO(including one ED glass)\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eImage circle\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd colspan=\"2\"\u003e\u003cstrong\u003e44mm\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eMaximum accessory connection (with the focuser fully retreated)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\n\u003cstrong\u003eImaging mode: \u003c\/strong\u003e \u003cbr\u003e\u003cstrong\u003e75mm (from the base of M48×0.75 male thread）\u003c\/strong\u003e \u003cbr\u003e\u003cstrong\u003e93mm（from the base of M54×0.75 male thread)\u003c\/strong\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\n\u003cstrong\u003eObserving mode:  \u003c\/strong\u003e \u003cbr\u003e\u003cstrong\u003e112mm（from the end of 1.25\" eyepiece holder）\u003c\/strong\u003e \u003cbr\u003e\u003cstrong\u003e122mm（from the end of 2\" eyepiece holder）\u003c\/strong\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eMinimum accessory connection (with the focuser fully extended)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\n\u003cstrong\u003eImaging mode: \u003c\/strong\u003e \u003cbr\u003e\u003cstrong\u003e45mm (from the base of M48×0.75 male thread）\u003c\/strong\u003e \u003cbr\u003e\u003cstrong\u003e63mm（from the base of M54×0.75 male thread)\u003c\/strong\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\n\u003cstrong\u003eObserving mode:  \u003c\/strong\u003e \u003cbr\u003e\u003cstrong\u003e82mm（from the end of 1.25\" eyepiece holder）\u003c\/strong\u003e \u003cbr\u003e\u003cstrong\u003e92mm（from the end of 2\" eyepiece holder）\u003c\/strong\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eTotal length\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd colspan=\"2\"\u003e\n\u003cstrong\u003e513mm(including 1.25\" adapter as dew shield contracted）\u003c\/strong\u003e \u003cbr\u003e\u003cstrong\u003e599mm(including 1.25\" adapter as dew shield fully stretched）\u003c\/strong\u003e \u003cbr\u003e\u003cstrong\u003e550mm(including the photographic adapter as dew shield contracted）\u003c\/strong\u003e \u003cbr\u003e\u003cstrong\u003e636mm(including the photographic adapter as dew shield fully stretched）\u003c\/strong\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eFocuser travel length\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd colspan=\"2\"\u003e\u003cstrong\u003e30mm\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eNet weight\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd colspan=\"2\"\u003e\u003cstrong\u003e3.92kg\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eGross weight (Including tube ring\u0026amp;dovetail plate)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd colspan=\"2\"\u003e\u003cstrong\u003e4.52kg\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eRear-end thread type\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd colspan=\"2\"\u003e\n\u003cstrong\u003eM64×1-M54×0.75        \u003c\/strong\u003e \u003cbr\u003e\u003cstrong\u003eM54×0.75-M54×0.75        \u003c\/strong\u003e \u003cbr\u003e\u003cstrong\u003eM54×0.75-M48×0.75  (with M48×0.75 filter thread)\u003c\/strong\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eStandard package items\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd colspan=\"2\"\u003e\u003cstrong\u003e A 91F OTA，a pair of tube rings, a handle, a 230mm Vixen dovetail plate, and a set of photographic adapters\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/figure\u003e\n\u003cp style=\"text-align: center;\"\u003e \u003c\/p\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cstrong\u003eProduct Size Diagram\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/Screenshot_2025-12-31_at_4.02.44_PM.png?v=1767222211\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/Screenshot_2025-12-31_at_4.03.09_PM.png?v=1767222210\"\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cstrong\u003eThe Locking Screw Position Diagram\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: left;\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/37f4ab88-3b9a-4c66-88f2-1674920272bb.jpg?v=1767392131\" alt=\"\"\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cstrong\u003eElectronic Focuser Assembly Diagram\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: left;\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/Screenshot_2026-01-02_at_3.17.00_PM.png?v=1767392379\" alt=\"\"\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: left;\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/Screenshot_2026-01-02_at_3.17.25_PM.png?v=1767392380\" alt=\"\"\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cstrong\u003eOptical Path Diagram \u003c\/strong\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: left;\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/fabf66d1-bbc7-47d2-95d9-13cbfcf8d59e.jpg?v=1767392488\" alt=\"\"\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cstrong\u003eSpot Diagram \u003c\/strong\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: left;\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/9204b293-5dea-45bd-a45d-91db45661241.jpg?v=1767392489\" alt=\"\"\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cstrong\u003eImages\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/b5f6d47e-bc5a-42e3-bf8a-da1e5312b953.jpg?v=1767392603\" alt=\"\"\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cmeta charset=\"UTF-8\"\u003eNGC281  |  张宇航  |  Askar 91F Flat-Field + ZWO ASI2600MC\u003c\/p\u003e\n\u003cp style=\"text-align: left;\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/aa472e92-cdc4-42e5-abc2-11effb6bf352.jpg?v=1767392605\" alt=\"\"\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cmeta charset=\"UTF-8\"\u003eNGC7293  |  张宇航  |  Askar 91F Flat-Field + ZWO ASI2600MC\u003c\/p\u003e\n\u003cp style=\"text-align: left;\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/bf5f815c-b3ec-47c2-9a98-7de9df824319.jpg?v=1767392600\" alt=\"\"\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cmeta charset=\"UTF-8\"\u003eGyulbudaghian's Nebula  |  Nico Carver  |  Askar 91F + ZWO ASI2600MC Air\u003c\/p\u003e\n\u003cp style=\"text-align: left;\"\u003e \u003c\/p\u003e\n\u003cp style=\"text-align: left;\"\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e","brand":"Askar","offers":[{"title":"Default Title","offer_id":47566815199491,"sku":"91F","price":999.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/bcb4bcd0-9b50-4a69-bf56-fbc6537def45_png_1180xaf_png.webp?v=1766874555"},{"product_id":"sqa85","title":"SQA85","description":"\u003cp style=\"text-align: center;\"\u003e\u003cstrong\u003eProduct Introduction\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/a30c51ab-d255-4fe3-9a5e-2c0a3ed3aeb9.jpg?v=1767825527\" alt=\"\"\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/09b2be19-bb01-4f8b-be2e-85eb90190386.jpg?v=1767825553\" alt=\"\"\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/3b6c307f-e79a-463b-aef0-89b13928aa95.jpg?v=1767825579\" alt=\"\"\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/dc18096b-86c9-4f02-9ebf-7c613437c5a7.jpg?v=1767825604\" alt=\"\"\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/809e7a44-f33f-4f06-9308-8f4b4419a880.jpg?v=1767825661\" alt=\"\"\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/c92fab35-d3f7-45f0-b4c9-0a3c0608cd45.jpg?v=1767825698\" alt=\"\"\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/61250eb4-51eb-45b1-98f4-857c75533f1e.jpg?v=1767825740\" alt=\"\"\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/24424a4a-188b-4016-875a-14aadd85c387.jpg?v=1767825946\" alt=\"\"\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/c2e9be1d-26cf-4bee-b0c8-d72bbbdc2209.jpg?v=1767826016\" alt=\"\"\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/6088e3ec-3f1b-4a97-896f-43dbfa874507.jpg?v=1767826016\" alt=\"\"\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/efb693eb-bb58-4484-9c5a-91c34be13c8f.jpg?v=1767826014\" alt=\"\"\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/f580ed7c-3b7b-485c-89cd-5d9f5d71a633.jpg?v=1767826014\" alt=\"\"\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/7a0a57fa-25fa-46c6-be0f-565fd2515873.jpg?v=1767826016\" alt=\"\"\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/80e13349-d31b-45a0-8076-08165a9765d0.jpg?v=1767826130\" alt=\"\"\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/58475961-2259-4c09-b67c-b75d08f64724.jpg?v=1767826126\" alt=\"\"\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cstrong\u003eSpecifications\u003c\/strong\u003e\u003c\/p\u003e\n\u003cfigure class=\"table\"\u003e\n\u003ctable align=\"center\" cellspacing=\"0\" width=\"84.20%\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd class=\"responsive-title\" colspan=\"3\" style=\"text-align: center;\"\u003e\u003cstrong\u003eParameters\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp\u003e\u003cstrong\u003eAperture size\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd colspan=\"2\"\u003e\n\u003cp\u003e\u003cstrong\u003e85mm\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp\u003e\u003cstrong\u003eFocal length\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd colspan=\"2\"\u003e\n\u003cp\u003e\u003cstrong\u003e 408mm\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp\u003e\u003cstrong\u003eFocal ratio\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd colspan=\"2\"\u003e\n\u003cp\u003e\u003cstrong\u003ef\/4.8\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp\u003e\u003cstrong\u003eObjective lens\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd colspan=\"2\"\u003e\n\u003cp\u003e\u003cstrong\u003eQuintuplet petzval APO（including two pieces of SD glass）\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp\u003e\u003cstrong\u003eTotal length\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd colspan=\"2\"\u003e\n\u003cp\u003e\u003cstrong\u003e403mm(when the dew shield is contracted)\u003c\/strong\u003e     \u003cbr\u003e\u003cstrong\u003e439mm(when the dew shield is stretched)\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp\u003e\u003cstrong\u003eFormat specifications\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd colspan=\"2\"\u003e\n\u003cp\u003e\u003cstrong\u003eFull-frame\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp\u003e\u003cstrong\u003eOTA weight\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd colspan=\"2\"\u003e\n\u003cp\u003e\u003cstrong\u003e3.64kg\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp\u003e\u003cstrong\u003eGross weight（including tube ring and dovetail plate）\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd colspan=\"2\"\u003e\n\u003cp\u003e\u003cstrong\u003e4.62kg\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp\u003e\u003cstrong\u003eRear-end thread type\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd colspan=\"2\"\u003e\n\u003cp\u003e\u003cstrong\u003eM48\/M54\/M68 adapters\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp\u003e\u003cstrong\u003eRear-end connection distance\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd colspan=\"2\"\u003e\n\u003cp\u003e\u003cstrong\u003eSupport 40-70mm range (Recommended connection length is 55mm)\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp\u003e\u003cstrong\u003eStandard package items\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd colspan=\"2\"\u003e\n\u003cp\u003e\u003cstrong\u003ea SQA85 OTA, an Oxford cloth case\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/figure\u003e\n\u003cp style=\"text-align: center;\"\u003e \u003c\/p\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cstrong\u003eProduct Size Diagram\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/94dac034-2489-4eea-b0a7-1eb07dbebac1.jpg?v=1767826240\" alt=\"\"\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cstrong\u003eSQA85 Connection Diagram\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/bb1efbb5-bf3a-47c6-b07b-f2341213072f.jpg?v=1767826289\" alt=\"\"\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cstrong\u003eThe Locking Screw Position Diagram\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/65b887ac-8ae3-4bbb-82e8-582719bd009d.jpg?v=1767826347\" alt=\"\"\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cstrong\u003eSQA85 Electronic Focuser Assembly Diagram\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/41845f58-0a1b-4c7e-a55a-304511b3d947.jpg?v=1767826411\" alt=\"\"\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/Screenshot_2026-01-07_at_3.54.12_PM.png?v=1767826468\" alt=\"\"\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/Screenshot_2026-01-07_at_3.55.05_PM.png?v=1767826515\" alt=\"\"\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/Screenshot_2026-01-07_at_3.55.43_PM.png?v=1767826556\" alt=\"\"\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cstrong\u003eImages\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/1dc0471a-5ac6-41fa-a1d4-5a07757570c9.jpg?v=1767826791\" alt=\"\"\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cmeta charset=\"UTF-8\"\u003e谭琨  |  Veil Nebula   |  ASKAR SQA85 + ToupTek 2600c\u003c\/p\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/850e7487-c4f0-4b13-b8e9-e5de050cb2f4.jpg?v=1767826978\" alt=\"\"\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cmeta charset=\"UTF-8\"\u003e谭琨  |  Veil Nebula   |  ASKAR SQA85 + ToupTek 2600c\u003c\/p\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/610385b4-97da-46b9-8f7b-5af4df7b744c.jpg?v=1767827058\" alt=\"\"\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cmeta charset=\"UTF-8\"\u003eRumen Bogdanovski | The Christmass Tree NGC 2264 | ASKAR SQA85 + ZWO ASI2600\u003c\/p\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/d81a6fec-1408-4fa3-9cf1-6276bbeaba69.jpg?v=1767827145\" alt=\"\"\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/4537e085-bc41-4299-b134-e7a5e43a7500.jpg?v=1767827176\" alt=\"\"\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cmeta charset=\"UTF-8\"\u003eMr.ZhuLiQun  |  Veil Nebula  |  ASKAR SQA85 + ZWO ASI6200MM\u003c\/p\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/b267547a-b465-403b-adcd-dddaa94d0558.jpg?v=1767827232\" alt=\"\"\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/4e888085-9899-49cc-8041-9c0aba996880.png?v=1767827226\" alt=\"\"\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cmeta charset=\"UTF-8\"\u003esandwall  |  NGC6590  |  ASKAR SQA85 + ZWO ASI 2600MC Pro\u003c\/p\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/811c9820-8779-4c9e-ac3d-bec58f4ddb10.jpg?v=1767827299\" alt=\"\"\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/d9bbd52f-f0ce-40e9-b0e4-622720579fa7.jpg?v=1767827299\" alt=\"\"\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cmeta charset=\"UTF-8\"\u003esandwall  |  M31  |  ASKAR SQA85 + ZWO ASI 2600MC Pro \u003c\/p\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/6b416fdb-520f-4b0e-9847-2e25fd6fc566.jpg?v=1767827380\" alt=\"\"\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/a43c0aeb-cf18-412d-bb3a-a76cdb320a20.png?v=1767827376\" alt=\"\"\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cmeta charset=\"UTF-8\"\u003eMr.Wang Hao  |  NGC2264  |  ASKAR SQA85 + ZWO ASI 2600MC Pro\u003c\/p\u003e\n\u003cp style=\"text-align: center;\"\u003e \u003c\/p\u003e\n\u003cp style=\"text-align: center;\"\u003e \u003c\/p\u003e","brand":"Askar","offers":[{"title":"Default Title","offer_id":47566820114691,"sku":"SQA85","price":2395.0,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/77765394-ec4f-4c6a-88e7-8849461b2e13.png_640xaf.png?v=1767826803"},{"product_id":"sqa70","title":"SQA70","description":"\u003cp style=\"text-align: center;\"\u003e\u003cstrong\u003eProduct Introduction \u003c\/strong\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/499a9aff-2279-44a2-b9b7-17d623d429f4.jpg?v=1767829828\"\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/cc4f41c4-88c5-4e56-9324-f33223f7d5b0.jpg?v=1767829828\"\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/a1d9dbbe-4f02-4ff9-9e9c-5f169537ca71.jpg?v=1767829827\"\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/af7cf5ba-c36c-4ff6-9e49-51642d90a93e.jpg?v=1767829826\"\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/d2e21b98-5d07-43c6-93ae-d75c2e75e208.jpg?v=1767829887\"\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/c2130013-04b9-409f-8a4e-13056dcad7ec.jpg?v=1767829923\"\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/6852eaf8-b578-4325-929e-3735c9d91a4f.jpg?v=1767829946\"\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/12a24f97-00e1-458d-aa3f-3207557522d0.jpg?v=1767830047\"\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/b88e1eba-4605-40fa-89a3-f6e4dfefbf51.jpg?v=1767830047\"\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/f264430c-d6c6-49f1-9270-c78591c65e6a.jpg?v=1767830045\"\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/ee3d1d2b-bdd5-46da-8b4f-a99ff48ab786.jpg?v=1767830045\"\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/a2406c81-2c79-4c49-a977-fb198d763275.jpg?v=1767830047\"\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/63623c76-aac9-48ef-882e-4154e31dd34c.jpg?v=1767830044\"\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/cbd06f54-fc31-4c00-ba2f-6ab5c39b7841.jpg?v=1767830045\"\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cstrong\u003eSpecifications\u003c\/strong\u003e\u003c\/p\u003e\n\u003cfigure class=\"table\"\u003e\n\u003ctable border=\"0\" width=\"84.20%\" cellspacing=\"0\" align=\"center\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"text-align: center;\" colspan=\"3\" class=\"responsive-title\"\u003e\u003cstrong\u003eParameters\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp\u003e\u003cstrong\u003eAperture size\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd colspan=\"2\"\u003e\n\u003cp\u003e\u003cstrong\u003e70mm\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp\u003e\u003cstrong\u003eFocal length\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd colspan=\"2\"\u003e\n\u003cp\u003e\u003cstrong\u003e336mm\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp\u003e\u003cstrong\u003eFocal ratio\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd colspan=\"2\"\u003e\n\u003cp\u003e\u003cstrong\u003ef\/4.8\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp\u003e\u003cstrong\u003eObjective lens\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd colspan=\"2\"\u003e\n\u003cp\u003e\u003cstrong\u003eQuintuplet petzval APO（including two pieces of ED glass）\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp\u003e\u003cstrong\u003eTotal length\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd colspan=\"2\"\u003e\n\u003cp\u003e\u003cstrong\u003e332mm(when the dew shield is contracted)\u003c\/strong\u003e       \u003cbr\u003e\u003cstrong\u003e372mm(when the dew shield is stretched)\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp\u003e\u003cstrong\u003eFormat specifications\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd colspan=\"2\"\u003e\n\u003cp\u003e\u003cstrong\u003efull frame（44mm）\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp\u003e\u003cstrong\u003eOTA weight\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd colspan=\"2\"\u003e\n\u003cp\u003e\u003cstrong\u003e2.68kg\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp\u003e\u003cstrong\u003eGross weight（including tube ring and dovetail plate）\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd colspan=\"2\"\u003e\n\u003cp\u003e\u003cstrong\u003e3.5kg\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp\u003e\u003cstrong\u003eRear-end thread type\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd colspan=\"2\"\u003e\n\u003cp\u003e\u003cstrong\u003eM42\/M48(with M48×0.75 filter thread)\/M54 adapters\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp\u003e\u003cstrong\u003eRear-end connection distance\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd colspan=\"2\"\u003e\n\u003cp\u003e\u003cstrong\u003eSupport 37-68mm range (Recommended connection length is 55mm)\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp\u003e\u003cstrong\u003eStandard package items\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd colspan=\"2\"\u003e\n\u003cp\u003e\u003cstrong\u003ea SQA70 OTA, an Oxford cloth case\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/figure\u003e\n\u003cp style=\"text-align: center;\"\u003e \u003c\/p\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cstrong\u003eProduct Size Diagram\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/8d292646-f919-4112-bd3f-5dd0f2bf88b5.jpg?v=1767830219\"\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cstrong\u003eSQA70 Connection Diagram\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/62c83762-5d3a-4e2d-89b8-c685b858ddd5.jpg?v=1767830267\"\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cstrong\u003eThe Locking Screw Position Diagram\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/c5de3e75-9421-4e89-84e0-f05312ce3cb8.jpg?v=1767830315\"\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cstrong\u003eSQA70 Electronic Focuser Assembly Diagram\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/ecf1a960-561a-4e5e-803a-f96bbd192fc5.jpg?v=1767830397\"\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/Screenshot_2026-01-07_at_5.02.18_PM.png?v=1767830564\"\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/Screenshot_2026-01-07_at_5.03.09_PM.png?v=1767830602\"\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/Screenshot_2026-01-07_at_5.03.45_PM.png?v=1767830636\"\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/Screenshot_2026-01-07_at_5.04.21_PM.png?v=1767830672\"\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cstrong\u003eImages\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/c3bbe53d-7cb2-4f0d-88c1-1b09057eedda.jpg?v=1767830760\"\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cmeta charset=\"UTF-8\"\u003eBrandon Boss  |  Andromeda Galaxy (M31)  |  ASKAR SQA70 + ZWO ASI533MC Pro\u003c\/p\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/1de1cb34-ec83-4d8b-9052-a5940e8144d4.jpg?v=1767830816\"\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cmeta charset=\"UTF-8\"\u003eSascha Wyss  |  M24 Region  |  ASKAR SQA70 + ZWO ASI2600MC AIR\u003c\/p\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/4d611550-dd51-409b-8429-1e194e944ece.jpg?v=1767831152\"\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cmeta charset=\"UTF-8\"\u003e郑寅杰  |  IC 1805  Heart Nebula  |  ASKAR SQA70 + ZWO ASI 2600MC\u003c\/p\u003e\n\u003cp style=\"text-align: center;\"\u003e \u003c\/p\u003e","brand":"Askar","offers":[{"title":"Default Title","offer_id":47566820901123,"sku":"SQA70","price":1595.0,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/776aa94d-b58b-4ee4-9653-e36ca2805d09.png_560xaf.png?v=1767831176"},{"product_id":"sqa55","title":"SQA55","description":"\u003cp style=\"text-align: center;\"\u003e\u003cstrong\u003eProduct Introduction \u003c\/strong\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/2c638bd8-1af3-4655-af56-84906c938ada.jpg?v=1767832246\" alt=\"\"\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cstrong\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/3367f0f6-5317-4fe6-b8aa-1f44f122a007.jpg?v=1767832246\" alt=\"\"\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cstrong\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/153ea354-6820-4ccb-a780-0b0651467419.jpg?v=1767832245\" alt=\"\"\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cstrong\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/b0d036cd-584a-46f5-8419-af97d2f4c945.jpg?v=1767832337\" alt=\"\"\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cstrong\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/debf6cb3-d1dd-4db0-a47d-1377f4581ada.jpg?v=1767832374\" alt=\"\"\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cstrong\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/97ca7a47-4826-42b3-8f77-fdfd37bf56ab.jpg?v=1767832445\" alt=\"\"\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cstrong\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/ac2e31b8-8e5b-4a4d-9e5e-849b19c32c49.jpg?v=1767832562\" alt=\"\"\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cstrong\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/e2088f3c-9543-4e37-9f0f-aaf9dae3ecd5.jpg?v=1767832602\" alt=\"\"\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cstrong\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/7a7b9112-e2ae-4ac1-90b1-3e3ec9c54e38.jpg?v=1767832697\" alt=\"\"\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cstrong\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/52eafb3f-4ca8-4838-b24c-264090eb01ac.jpg?v=1767832697\" alt=\"\"\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cstrong\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/c845a3d6-fdf8-4c7b-8902-6990bc63b777.jpg?v=1767832697\" alt=\"\"\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cstrong\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/0d96250c-b493-4cbf-8dae-abcaa95b259e.jpg?v=1767832696\" alt=\"\"\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cstrong\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/8f258aec-a8de-48f4-ac01-e4d48df43326.jpg?v=1767832696\" alt=\"\"\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cstrong\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/a93e65b1-3869-4e33-9200-5baaf04a8fb3.jpg?v=1767832864\" alt=\"\"\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cstrong\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/0289cacd-b424-4bbd-9c90-6f7ec5d52bd3.jpg?v=1767832866\" alt=\"\"\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cstrong\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/8ff2f437-ff96-485b-ab9c-f5c2afa44c6d.jpg?v=1767832866\" alt=\"\"\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cstrong\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/15ac6e2f-c313-4dbf-ab92-ced8403b64b5.jpg?v=1767832865\" alt=\"\"\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003ca href=\"https:\/\/milehighastro.com%20%E2%80%BA%20products%20%E2%80%BA%20sqa55-af-kit\" title=\"SQA AF Kit\" rel=\"noopener\" target=\"_blank\"\u003e\u003cstrong\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/f8e2f243-62e6-45a1-824f-146ddd977001.jpg?v=1767832864\" alt=\"\"\u003e\u003c\/strong\u003e\u003c\/a\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cstrong\u003eSpecifications\u003c\/strong\u003e\u003c\/p\u003e\n\u003cfigure class=\"table\"\u003e\n\u003ctable\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"text-align: center;\" colspan=\"2\" class=\"responsive-title\"\u003e\u003cstrong\u003eSQA55 Parameters\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp\u003e\u003cstrong\u003eAperture size\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\n\u003cp\u003e\u003cstrong\u003e55mm\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp\u003e\u003cstrong\u003eFocal length\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\n\u003cp\u003e\u003cstrong\u003e264mm\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp\u003e\u003cstrong\u003eFocal ratio\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\n\u003cp\u003e\u003cstrong\u003ef\/4.8\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp\u003e\u003cstrong\u003eObjective lens\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\n\u003cp\u003e\u003cstrong\u003eQuintuplet petzval APO（One piece of SD glass, one piece of ED glass）\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp\u003e\u003cstrong\u003eImage circle\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\n\u003cp\u003e\u003cstrong\u003e44mm\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp\u003e\u003cstrong\u003eAperture blades\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\n\u003cp\u003e\u003cstrong\u003e14 pieces\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp\u003e\u003cstrong\u003eGraded Aperture\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\n\u003cp\u003e\u003cstrong\u003ef\/4.8-f\/22\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp\u003e\u003cstrong\u003eClosest Focus Distance\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\n\u003cp\u003e\u003cstrong\u003e5m\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp\u003e\u003cstrong\u003eFocusing mode\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\n\u003cp\u003e\u003cstrong\u003eManual focus\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp\u003e\u003cstrong\u003eFilter Diameter\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\n\u003cp\u003e\u003cstrong\u003eM67\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp\u003e\u003cstrong\u003eTotal length\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\n\u003cp\u003e\u003cstrong\u003e316mm (inclulding dew shield); 244mm (without dew shield)\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp\u003e\u003cstrong\u003eOTA weight\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\n\u003cp\u003e\u003cstrong\u003e1.84kg\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp\u003e\u003cstrong\u003eTotal weight (including handle \u0026amp; dovetail plate)\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\n\u003cp\u003e\u003cstrong\u003e2.18kg\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp\u003e\u003cstrong\u003eRear-end adapter\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\n\u003cp\u003e\u003cstrong\u003eM48*0.75 (with M48×0.75 filter thread)\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp\u003e\u003cstrong\u003eRear-end connection distance\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\n\u003cp\u003e\u003cstrong\u003eSupport 50-60mm range (Recommended connection length is 55mm)\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp\u003e\u003cstrong\u003eStandard package items\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\n\u003cp\u003e\u003cstrong\u003ea SQA55 OTA, a military-grade waterproof hand-carrying case\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/figure\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cstrong\u003eProduct Size Diagram\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/ad04c525-150e-432d-9d40-029448807e34.jpg?v=1767913337\"\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cstrong\u003eSQA55 Connection Diagram\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/ea6064f6-cfa9-4d78-95ee-b573bde1256b.jpg?v=1767913390\"\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cstrong\u003eSQA55 AFkit Electronic Focuser Assembly Diagram\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cstrong\u003e\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/Screenshot_2026-01-08_at_4.05.25_PM.png?v=1767913545\"\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/Screenshot_2026-01-08_at_4.09.51_PM.png?v=1767913804\"\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/Screenshot_2026-01-08_at_4.10.31_PM.png?v=1767913842\"\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cstrong\u003eImages\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/52591fbb-9dcf-4570-8908-9c6c897217de.jpg?v=1767913904\"\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cmeta charset=\"UTF-8\"\u003eDiego Celery  |  Carina Nebula, C92  |  ASKAR SQA55 +  ZWO ASI2600MM Pro\u003c\/p\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/f51317ab-f7d3-416b-ac44-7e8c36369a03.jpg?v=1767914017\"\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cmeta charset=\"UTF-8\"\u003eDiego Celery  |  NGC 2327  |  ASKAR SQA55 +  ZWO ASI2600MM Pro\u003c\/p\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/695bbfd8-c0cd-4ed6-8ecf-db570ed13aca.jpg?v=1767914073\"\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cmeta charset=\"UTF-8\"\u003e李昂  |  IC443、NGC 2175  |  ASKAR SQA55 +  ZWO ASI2600 MC Air\u003c\/p\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/96d34bcc-e5a5-444a-970a-d4198f23ed47.jpg?v=1767914116\"\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cmeta charset=\"UTF-8\"\u003e小卡子、万一  |  NGC1499  |  ASKAR SQA55 + ZWO ASI2600MM Pro\u003c\/p\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/c986622d-a088-4097-afe7-8837b1d611ee.jpg?v=1767914165\"\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cmeta charset=\"UTF-8\"\u003eSandwall  |  IC434  |  ASKAR SQA55 + ZWO ASI2600Mc Pro\u003c\/p\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/7c7f0f7f-7b80-47d6-8db6-2038c617fd73.jpg?v=1767914204\"\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cmeta charset=\"UTF-8\"\u003eMatthias Steiner  |  NGC7822  |  ASKAR SQA55 + ASI2600mcp\u003c\/p\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/99fb85a5-47fa-4e96-ad7b-67659eb52d56.jpg?v=1767914255\"\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/c2203a57-dbbd-4eaa-9d78-a6fb1922b24f.jpg?v=1767914255\"\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cmeta charset=\"UTF-8\"\u003eMr.ZhuLiQun  |   NGC7000  |  ASKAR SQA55 + ZWO ASI 6200\u003c\/p\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/61e87c19-4381-48a4-b9a8-8132473dea2e.jpg?v=1767914462\"\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/3f7feeb0-0bd4-4921-821b-52d5bcf4fb58.jpg?v=1767914460\"\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cmeta charset=\"UTF-8\"\u003esandwall \u0026amp; ARK  |   M20+M8  |  ASKAR SQA55 + ZWO ASI 2600MC Pro\u003c\/p\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/3e7fc4a5-8426-4c39-bfe5-1e7703051b20.jpg?v=1767914543\"\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/d0f48545-0475-411e-9277-352208618d30.jpg?v=1767914539\"\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cmeta charset=\"UTF-8\"\u003eDrew Evans  |  THE GREAT RHO OPHIUCHI CLOUD COMPLEX  |  ASKAR SQA55 + ZWO ASI2600MC DUO · ZWO ASI2600MM Pro\u003c\/p\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/fa1405f3-39a2-492c-a514-56335ce844cc.jpg?v=1767914616\"\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/2f4cf52c-2535-4cd1-99e0-ce7ace07d8b0.jpg?v=1767914616\"\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cmeta charset=\"UTF-8\"\u003eTianXingZhe  |  NGC6888  |  ASKAR SQA55 + ZWO ASI2600MC\u003c\/p\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/6fbf8e88-bf93-44b5-8361-b8a07f5c63bc.jpg?v=1767914687\"\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/45d49f95-1541-4166-9728-c5046422a8b7.jpg?v=1767914687\"\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cmeta charset=\"UTF-8\"\u003esandwall  |    Veil Nebula  |  ASKAR SQA55 + ZWO ASI 2600MC Pro\u003c\/p\u003e\n\u003cp style=\"text-align: center;\"\u003e \u003c\/p\u003e","brand":"Askar","offers":[{"title":"Default Title","offer_id":47566820933891,"sku":"SQA55","price":795.0,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/855d05fd-bdbb-47f2-ab27-4f90b22a2dd3.png_560xaf.png?v=1767833066"},{"product_id":"sqa106","title":"Askar SQA106 106mm f\/4.8 Quintuplet APO Astrograph","description":"\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e106mm aperture, f\/4.8\u003c\/strong\u003e — a fast astrograph that pulls in detail quickly, ideal for shorter exposures on nebulae and galaxies\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e509mm focal length\u003c\/strong\u003e — a wide-to-medium field that frames large targets like the Andromeda Galaxy, the Pleiades, and the Cocoon Nebula\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eQuintuplet Petzval APO optics\u003c\/strong\u003e — five-element design with a built-in field flattener, so you get pinpoint stars edge-to-edge with no separate flattener to buy\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTwo SD (Special Dispersion) glass elements\u003c\/strong\u003e — suppresses chromatic aberration for tight, neutral, false-color-free stars\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMedium-format (55mm) image circle\u003c\/strong\u003e — fully covers a full-frame (44mm) sensor with room to spare for filter wheels and off-axis guiders\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFlexible back-focus\u003c\/strong\u003e — M48\/M54\/M68 adapters supporting a 48–78mm range (55mm recommended) to match most camera setups\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLightweight for its class\u003c\/strong\u003e — 5.82 kg OTA (8.12 kg with tube rings and dovetail)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIncludes\u003c\/strong\u003e — SQA106 OTA and a padded Oxford cloth case\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp style=\"text-align: left;\"\u003e\u003cmeta charset=\"utf-8\"\u003eThe Askar SQA106 is a fast, travel-friendly astrograph built for one job: clean, wide-field deep-sky imaging straight out of the case. Its quintuplet Petzval design bakes the field flattener into the optics, delivering pinpoint stars across a flat medium-format image circle that fully covers a full-frame sensor — no separate flattener to buy or space. At 106mm and f\/4.8, it's fast enough to pull real detail out of nebulae and galaxies in short order, with a 509mm focal length that frames large targets like the Andromeda Galaxy, the Pleiades, and the Cocoon Nebula beautifully. A built-in focuser and M48\/M54\/M68 back-focus flexibility make matching your camera train straightforward. At around 5.82 kg for the OTA, it's a genuine grab-and-go imaging rig for dark-sky trips — and one our team can help you pair with the right mount and camera before you buy.\u003c\/p\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cstrong\u003eProduct Introduction\u003c\/strong\u003e\u003cstrong\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/2c4023a2-fb5e-4768-975b-8411ced3c4ac.jpg?v=1767821409\" alt=\"\"\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cstrong\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/4ef6aeb5-b815-496a-8d00-f1eaddbbace0.jpg?v=1767821472\" alt=\"\"\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cstrong\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/aa0020c5-e1a5-4acb-b550-b453efb05173.jpg?v=1767821498\" alt=\"\"\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cstrong\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/b13b317c-0986-43bd-9718-baa32f2b02a8.jpg?v=1767821527\" alt=\"\"\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cstrong\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/4690120c-cfd6-462f-9f77-723abece10af.jpg?v=1767821556\" alt=\"\"\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cstrong\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/c5a09177-5d99-4309-a6fd-8086e41b6ff8.jpg?v=1767821610\" alt=\"\"\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cstrong\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/9470ea7b-103d-4a43-8e73-05499ced4b54.jpg?v=1767821644\" alt=\"\"\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cstrong\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/6597313d-716c-4088-8cf6-7ed7c0dd2b8a.jpg?v=1767821671\" alt=\"\"\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cstrong\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/5aa05978-041f-4bb4-8a4c-3fc542a35efb.jpg?v=1767821705\" alt=\"\"\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cstrong\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/edef5422-701b-4864-bd1e-e4855c2f28f6.jpg?v=1767821728\" alt=\"\"\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cstrong\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/e4e0891b-f6f3-477a-b5e9-31d91cb8b9ca.jpg?v=1767821759\" alt=\"\"\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cstrong\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/1b1a6002-4b02-424b-9f90-14ab3a49f2ec.jpg?v=1767821797\" alt=\"\"\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cstrong\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/343b6966-51dd-45a0-96b9-5ed74cb90c36.jpg?v=1767821876\" alt=\"\"\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cstrong\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/6be33401-75e1-494d-8137-db21b73c5492.jpg?v=1767821911\" alt=\"\"\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cstrong\u003eSpecifications\u003c\/strong\u003e\u003c\/p\u003e\n\u003cfigure class=\"table\"\u003e\n\u003ctable align=\"center\" cellspacing=\"0\" width=\"84.20%\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd class=\"responsive-title\" colspan=\"3\" style=\"text-align: center;\"\u003e\u003cstrong\u003eParameters\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp\u003e\u003cstrong\u003eAperture size\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd colspan=\"2\"\u003e\n\u003cp\u003e\u003cstrong\u003e106mm\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp\u003e\u003cstrong\u003eFocal length\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd colspan=\"2\"\u003e\n\u003cp\u003e\u003cstrong\u003e509mm\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp\u003e\u003cstrong\u003eFocal ratio\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd colspan=\"2\"\u003e\n\u003cp\u003e\u003cstrong\u003ef\/4.8\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp\u003e\u003cstrong\u003eObjective lens\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd colspan=\"2\"\u003e\n\u003cp\u003e\u003cstrong\u003eQuintuplet petzval APO（including two pieces of SD glass）\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp\u003e\u003cstrong\u003eTotal length\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd colspan=\"2\"\u003e\n\u003cp\u003e\u003cstrong\u003e516mm(when the dew shield is contracted)\u003c\/strong\u003e   \u003cbr\u003e\u003cstrong\u003e586mm(when the dew shield is stretched)\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp\u003e\u003cstrong\u003eFormat specifications\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd colspan=\"2\"\u003e\n\u003cp\u003e\u003cstrong\u003eMedium format(55mm),covers full frame(44mm)\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp\u003e\u003cstrong\u003eOTA weight\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd colspan=\"2\"\u003e\n\u003cp\u003e\u003cstrong\u003e5.82kg\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp\u003e\u003cstrong\u003eGross weight（including tube ring and dovetail plate）\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd colspan=\"2\"\u003e\n\u003cp\u003e\u003cstrong\u003e8.12kg\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp\u003e\u003cstrong\u003eRear-end thread type\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd colspan=\"2\"\u003e\n\u003cp\u003e\u003cstrong\u003eM48\/M54\/M68 adapters\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp\u003e\u003cstrong\u003eRear-end connection distance\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd colspan=\"2\"\u003e\n\u003cp\u003e\u003cstrong\u003eSupport 48-78mm range (Recommended connection length is 55mm)\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp\u003e\u003cstrong\u003eStandard package items\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd colspan=\"2\"\u003e\n\u003cp\u003e\u003cstrong\u003ea SQA106 OTA, an Oxford cloth case\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/figure\u003e\n\u003cp style=\"text-align: center;\"\u003e \u003c\/p\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cstrong\u003eProduct Size Diagram\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cstrong\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/781d6501-472e-47d0-a857-87ac0595cb7e.jpg?v=1767822004\" alt=\"\"\u003e\u003c\/strong\u003e\u003cstrong\u003eSQA106 Connection Diagram\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cstrong\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/SQA106_connection_diagram.jpg?v=1773945316\" alt=\"\"\u003e\u003c\/strong\u003e\u003cstrong\u003eThe Locking Screw Position Diagram\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cstrong\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/a07f750f-28e5-40f9-b02a-a58bb523ae21.jpg?v=1767822104\" alt=\"\"\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cstrong\u003eSQA106 Electronic Focuser Assembly Diagram \u003c\/strong\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cstrong\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/c1beb3c6-1947-4f0f-9922-265ec2103f99.jpg?v=1767822188\" alt=\"\"\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cstrong\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/Screenshot_2026-01-07_at_2.43.58_PM.png?v=1767822257\" alt=\"\"\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cstrong\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/Screenshot_2026-01-07_at_2.44.57_PM.png?v=1767822308\" alt=\"\"\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cstrong\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/Screenshot_2026-01-07_at_2.45.56_PM.png?v=1767822368\" alt=\"\"\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cstrong\u003eImages\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cstrong\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/db351d09-5257-4375-80db-5071bc28e74f.jpg?v=1767822435\" alt=\"\"\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: center;\"\u003e东东锅  |  NGC2237  |  ASKAR SQA106 +  ZWO 2600mm pro\u003c\/p\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cstrong\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/d2502b1c-a1ee-4051-953a-f7fb04a12e5f.jpg?v=1767822518\" alt=\"\"\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: center;\"\u003e东东锅  |  M45  |  ASKAR SQA106 +  ZWO 2600mm pro\u003c\/p\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cstrong\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/d0d0895b-2a7a-49d9-bed8-3df358f6242c.jpg?v=1767822571\" alt=\"\"\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: center;\"\u003e国产电灯泡  |  NGC6888  |  ASKAR SQA106 +  ZWO ASI 6200MM \u003c\/p\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/50da3eac-189b-4451-aea6-dfbd51df3be5.jpg?v=1767822664\"\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cmeta charset=\"UTF-8\"\u003eRalf Rohner  |  The Cosmic Squid  |  ASKAR SQA106 +  ZWO ASI 1600MM Pro\u003cstrong\u003e \u003c\/strong\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/0735a5db-91d6-47dc-a97f-9b4a3cd61137.jpg?v=1767822725\"\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/51c56665-562a-4e84-8987-c6d73fa1a365.jpg?v=1767822750\"\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cmeta charset=\"UTF-8\"\u003eMr.TianXingZhe  |  ic5146  |  ASKAR SQA106 + ZWO ASI2600MC\u003c\/p\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/78f6e0e6-1b70-4ce0-bd8a-bbb0575d22ef.jpg?v=1767822798\"\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/f791735d-fe92-4785-bf2f-8c4ec911bf09.jpg?v=1767822796\"\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cmeta charset=\"UTF-8\"\u003eDrew Evans |  M31 Andromeda Galaxy  | ASKAR SQA106 + 2400mc Pro full frame OSC\u003c\/p\u003e\n\u003cp style=\"text-align: center;\"\u003e \u003c\/p\u003e","brand":"Askar","offers":[{"title":"Default Title","offer_id":47566821261571,"sku":"SQA106","price":3395.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/da1939c1-188a-4d4b-9147-ace5a3276b88.png_640xaf.png?v=1767822644"},{"product_id":"sqa130","title":"Askar SQA130 Quintuplet APO Refractor Astrograph — 130mm f\/4.8","description":"\u003ch3 dir=\"ltr\"\u003eA refined optical system with exceptional sharpness\u003c\/h3\u003e\n\u003cp dir=\"ltr\"\u003eThe Askar SQA130 is built for one job — deep-sky astrophotography — and it's built to do that job the moment it's out of the case. The \u003cstrong\u003equintuplet Petzval design\u003c\/strong\u003e bakes the field flattener into the optical formula, so you get a flat, corrected field edge to edge for up to a medium format camera with no separate flattener to buy, spacing, or tuning. That means no fiddly back focus adjustment work that eats your first few clear nights.\u003c\/p\u003e\n\u003cp dir=\"ltr\"\u003eAt \u003cstrong\u003e130mm of aperture and f\/4.8\u003c\/strong\u003e, this is a \u003cem\u003efast\u003c\/em\u003e astrograph. That speed is the whole point: it pulls faint nebulosity and galaxy detail out of the sky in a fraction of the integration time a slower scope needs — which, on the Front Range where clear nights are precious, is the difference between a finished project and one you're still chasing next season.\u003c\/p\u003e\n\u003ch3 dir=\"ltr\"\u003eCoverage that keeps up with big sensors\u003c\/h3\u003e\n\u003cp dir=\"ltr\"\u003eThe SQA130 throws a \u003cstrong\u003emedium-format image circle (55mm)\u003c\/strong\u003e that fully covers a 44mm full-frame sensor with room to spare. In plain terms: no vignetting worries with large modern cameras, and enough clean field left over for off-axis guiding and filter wheels without clipping the corners. If you're running — or planning to run — a full-frame or larger sensor, this is the coverage that makes it work.\u003c\/p\u003e\n\u003cp dir=\"ltr\"\u003eThe \u003cstrong\u003e624mm focal length\u003c\/strong\u003e lands in a genuinely useful spot: wide enough for large emission nebulae and sweeping star fields, long enough to frame bigger galaxies and clusters well. It's a focal length you won't outgrow after one season.\u003c\/p\u003e\n\u003ch3 dir=\"ltr\"\u003eOptics that earn the \"APO\"\u003c\/h3\u003e\n\u003cp dir=\"ltr\"\u003eTwo elements of \u003cstrong\u003eSD (Special Dispersion) glass\u003c\/strong\u003e in the five-element design suppress the chromatic aberration that shows up as bloated, purple-fringed stars in lesser scopes. The result is tight, neutral, pinpoint stars across the frame and clean color you don't have to rescue in processing.\u003c\/p\u003e\n\u003ch3 dir=\"ltr\"\u003eBuilt to connect to your gear\u003c\/h3\u003e\n\u003cp dir=\"ltr\"\u003eThe rear cell accepts \u003cstrong\u003eM48 \/ M54 \/ M68 adapters\u003c\/strong\u003e and supports a \u003cstrong\u003e46–76mm back-focus range (55mm recommended)\u003c\/strong\u003e — enough flexibility to dial in most camera, filter-wheel, and OAG combinations without a custom spacer hunt. The built-in focuser keeps the imaging train rigid and repeatable.\u003c\/p\u003e\n\u003ch3 dir=\"ltr\"\u003eAn honest word on what it needs\u003c\/h3\u003e\n\u003cp dir=\"ltr\"\u003eThis is a serious instrument, and it has a serious footprint. The OTA is \u003cstrong\u003e9.18 kg (about 20 lb)\u003c\/strong\u003e, and roughly \u003cstrong\u003e11.76 kg (about 26 lb)\u003c\/strong\u003e with rings and dovetail — before you add camera, guiding, and cabling. Plan on a solid imaging mount with real payload headroom (think ZWO AM7 or 50 lb capacity EQ mount) to get the foundation this optic deserves. Not sure your mount is up to it? \u003cem\u003eThat's exactly the kind of question our team is here for — call us before you buy and we'll make sure you have a ready to go system.\u003c\/em\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cstrong\u003eProduct Introduction \u003c\/strong\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/b775efd6-6fd5-4ba5-8a7a-d6ce1cbed593.jpg?v=1767394016\" alt=\"\"\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/880f7dc0-572e-415d-b62f-f328b440b925.jpg?v=1767394014\" alt=\"\"\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/b76ce8c3-6a57-45c0-9aea-1f6439ac5df7.jpg?v=1767394086\" alt=\"\"\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/318d89fa-928b-4ca1-b03c-a7cbf102d53c.jpg?v=1767394128\" alt=\"\"\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/638fa45b-1ae5-414d-967e-bc88ef9a707b.jpg?v=1767394171\" alt=\"\"\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/004c4c4b-9998-4e16-b343-59282efd75f6.jpg?v=1767394206\" alt=\"\"\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/5ace31db-10a1-477b-afde-7966f3babe42.jpg?v=1767394254\" alt=\"\"\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/67e866b4-9601-4a52-860c-338c18762dc6.jpg?v=1767394280\" alt=\"\"\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/8a132b3a-925d-41be-bb37-ddda2e6bb905.jpg?v=1767394308\" alt=\"\"\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/48abf15f-8c6e-4345-98bc-cb21cbeca6c4.jpg?v=1767394332\" alt=\"\"\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/a36a88bf-ea1a-46de-88e0-3b1f1a745c3e.jpg?v=1767394360\" alt=\"\"\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/a71df458-e82e-4b5d-bb0a-a591ec0b5cc6.jpg?v=1767394392\" alt=\"\"\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/df3056cc-85d8-490e-8f17-50e7ddf4695e.jpg?v=1767394420\" alt=\"\"\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cstrong\u003eSpecifications\u003c\/strong\u003e\u003c\/p\u003e\n\u003cfigure class=\"table\"\u003e\n\u003ctable border=\"0\" width=\"84.20%\" cellspacing=\"0\" align=\"center\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"text-align: center;\" colspan=\"3\" class=\"responsive-title\"\u003e\u003cstrong\u003eParameters\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp\u003e\u003cstrong\u003eAperture size\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd colspan=\"2\"\u003e\n\u003cp\u003e\u003cstrong\u003e130mm\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp\u003e\u003cstrong\u003eFocal length\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd colspan=\"2\"\u003e\n\u003cp\u003e\u003cstrong\u003e624mm \u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp\u003e\u003cstrong\u003eFocal ratio\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd colspan=\"2\"\u003e\n\u003cp\u003e\u003cstrong\u003ef\/4.8\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp\u003e\u003cstrong\u003eObjective lens\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd colspan=\"2\"\u003e\n\u003cp\u003e\u003cstrong\u003eQuintuplet petzval APO（including two pieces of SD glass）\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp\u003e\u003cstrong\u003eTotal length\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd colspan=\"2\"\u003e\n\u003cp\u003e\u003cstrong\u003e650mm(when the dew shield is contracted)\u003c\/strong\u003e       \u003cbr\u003e\u003cstrong\u003e764mm(when the dew shield is stretched)\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp\u003e\u003cstrong\u003eFormat specifications\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd colspan=\"2\"\u003e\n\u003cp\u003e\u003cstrong\u003eMedium format(55mm), covers full frame(44mm)\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp\u003e\u003cstrong\u003eOTA weight\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd colspan=\"2\"\u003e\n\u003cp\u003e\u003cstrong\u003e9.18kg\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp\u003e\u003cstrong\u003eGross weight（including tube ring and dovetail plate）\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd colspan=\"2\"\u003e\n\u003cp\u003e\u003cstrong\u003e11.76kg\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp\u003e\u003cstrong\u003eRear-end thread type\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd colspan=\"2\"\u003e\n\u003cp\u003e\u003cstrong\u003eM48\/M54\/M68 adapters\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp\u003e\u003cstrong\u003eRear-end connection distance\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd colspan=\"2\"\u003e\n\u003cp\u003e\u003cstrong\u003eSupport 46-76mm range (Recommended connection length is 55mm)\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp\u003e\u003cstrong\u003eStandard package items\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd colspan=\"2\"\u003e\n\u003cp\u003e\u003cstrong\u003ea SQA130 OTA, an Oxford cloth case\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/figure\u003e\n\u003cp style=\"text-align: center;\"\u003e \u003c\/p\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cstrong\u003eProduct Size Diagram\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/Screenshot_2026-01-07_at_2.13.44_PM.png?v=1767820460\"\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/Screenshot_2026-01-07_at_2.15.16_PM.png?v=1767820526\"\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/Screenshot_2026-01-07_at_2.16.08_PM.png?v=1767820578\"\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cstrong\u003eConnection Diagram\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cstrong\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/SQA130_connection_diagram.jpg?v=1773945136\" alt=\"\"\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cstrong\u003eThe Locking Screw Position Diagram\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/b452b447-48dc-4885-9971-99a0590ef51e.jpg?v=1767820703\"\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cstrong\u003eElectronic Focuser Assembly Diagram\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/Screenshot_2026-01-07_at_2.20.02_PM.png?v=1767820814\"\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/Screenshot_2026-01-07_at_2.20.47_PM.png?v=1767820857\"\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/Screenshot_2026-01-07_at_2.21.26_PM.png?v=1767820901\"\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/Screenshot_2026-01-07_at_2.22.16_PM.png?v=1767820946\"\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cstrong\u003eImages\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/4e23570a-20f7-4ddb-9a05-72b7178b0976.jpg?v=1767821013\"\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cmeta charset=\"UTF-8\"\u003eClearSky  |  M42  |  ASKAR SQA130 + ZWO 2600DUO\u003c\/p\u003e\n\u003cp style=\"text-align: center;\"\u003e \u003c\/p\u003e","brand":"Askar","offers":[{"title":"Default Title","offer_id":47566821490947,"sku":"SQA130","price":4799.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/1f9fd3c3-88fb-4268-96ef-ca7379b3f4f7.png_1180xaf_ba4621c0-43e1-42be-9209-7cfbdde36ae1.png?v=1785336210"},{"product_id":"ultra-cat-131","title":"UltraCat 131","description":"\u003cp\u003e\u003cspan style=\"color: rgb(255, 42, 0);\"\u003e\u003cem\u003e\u003cb\u003eExpected availability in August 2026. Contact us to pre-order.\u003c\/b\u003e\u003c\/em\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003ch1\u003e\u003cb\u003eTechnical Highlights\u003c\/b\u003e\u003c\/h1\u003e\n\u003cp\u003eThe Ultra-Cat 131 is William Optics most advanced astrograph to date, featuring a massive \u003cb\u003e60mm image circle\u003c\/b\u003e to support medium-format and full-frame sensors:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cb\u003eOptics:\u003c\/b\u003e 5-Element Advanced Petzval (Super ED \u0026amp; Lanthanum glass).\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cb\u003eAperture:\u003c\/b\u003e 131mm | \u003cb\u003eFocal Ratio:\u003c\/b\u003e \u003cspan class=\"gmail-math-inline\"\u003e$f\/4.9\u003c\/span\u003e | \u003cb\u003eFocal Length:\u003c\/b\u003e 648mm.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cb\u003eFocuser:\u003c\/b\u003e Patented WIFD (Internal Focuser) to eliminate vignetting and tilt.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cb\u003eIncluded:\u003c\/b\u003e Sensor Tilt Xterminator, Rotator, and built-in Bahtinov Mask.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"William Optics","offers":[{"title":"Default Title","offer_id":47566824636675,"sku":null,"price":5398.0,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/UC131-Teaser.jpg?v=1772039308"},{"product_id":"71f-flat-field-1","title":"71F Flat-Field","description":"\u003cul\u003e\n\u003cli\u003eFlat Field Quadruplet APO\u003c\/li\u003e\n\u003cli\u003e71mm Aperture f\/4.9\u003c\/li\u003e\n\u003cli\u003e490mm Focal Length\u003c\/li\u003e\n\u003cli\u003e44mm Imaging Circle\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cimg\u003e\u003cimg\u003e\u003cimg\u003e\u003cimg\u003e\u003cimg\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/0b3ea7cc-b50d-4b70-b55a-12b9a2d36813.jpg?v=1766871127\" alt=\"\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/71F_new_icons.jpg?v=1781118433\" alt=\"\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eThe Askar 71F is an OTA with an aperture of 71mm, a focal length of 490mm, and a native focal ratio of F6.9.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eThe Askar 71F adopts a quadruplet air-spaced APO lens design, including one piece of ED glass， which can effectively reduce chromatic aberration. The Askar 71F supports 44mm full-frame imaging with great performance of the surrounding star points.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eThe Askar 71F is a self-flattened design that allows users to avoid calculating the back focus and buying additional flattener, after attaching the imaging accessories, users can directly use it for shooting after the OTA is in focus. This further reduces the cost and improves the pleasure of shooting. \u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/452d026e-05e4-46e3-b2c5-573111849bf3.jpg?v=1766871276\" alt=\"\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eWith practicality and versatility in mind, the Askar 71F's weight and size are effectively controlled, making it easy to carry and use. The Askar 71F OTA weighs only 2.5kg and the gross weight is 3kg (including the tube rings and dovetail plate).\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eThe Askar 71F is versatile in its use, allowing for both \u003cmeta charset=\"utf-8\"\u003eastrophotography and visual observation. (Visual use by adding a diagonal and eyepieces, sold separately).\u003c\/span\u003e\u003cspan style=\"font-size: 0.875rem;\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/0150e1d9-31f9-4d06-aad6-9aec5aa14267.jpg?v=1766871431\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/d3e609f0-1bf3-45f4-8e56-959688475f63.jpg?v=1766871488\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eThe Askar 71F also comes standard with a photographic extension tube, which includes M48*0.75\u0026amp;M54*0.75 adapters, it also contains a built-in 2-inch filter thread for easy shooting connections. No matter whether connecting a traditional DSLR camera or a professional astronomical camera, it is very convenient to use. When users go out, they can directly connect the shooting accessories to record the beautiful view at any time. \u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eThe mechanical design of the Askar 71F itself adheres to Askar's consistent philosophy of taking into account the user's habits and minimizing the user's invisible costs.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eThe dew shield of the Askar 71F is a retractable design, further shortening the overall length and increasing portability. The entire lens tube of Askar 71F is crafted using high-quality CNC machining. All the inner of the Askar 71F's dew shield is covered with matting paint to effectively reduce stray light reflections. The overall blue and white color scheme makes the telescope look more refined.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eOn the handlebar of Askar 71F, it designs a finder base slot. Besides, there are two finder bases on both sides of the focuser, which not only eliminates the need for disassembling when changing the position of the finder scope but also provides additional mounting positions for other astronomical accessories.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eIn terms of the focuser, the Askar 71F is equipped with a dual-speed R\u0026amp;P 2.4-inch rigid focuser, which has a 1:10 fine adjustment and a 360° scale field rotator at the rear end for precise angle adjustment.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eThe Askar 71F's dovetail plate is a 230mm standard Vixen dovetail plate, which slotted 1\/4 screw holes as well as 3\/8 screw holes for direct tripod attachment.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eAs an affordable and high-quality versatile self-flattened OTA, we look forward to the Askar 71F accompanying you to discover more beautiful sights! \u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003ch3 class=\"e_h3-72 s_summary\" style=\"text-align: center;\"\u003eSpecifications\u003c\/h3\u003e\n\u003cdiv class=\"e_richText-73 s_title clearfix response-transition\"\u003e\n\u003cfigure class=\"table\"\u003e\n\u003ctable align=\"center\" cellspacing=\"0\" width=\"84.20%\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd class=\"responsive-title\" colspan=\"3\" style=\"text-align: center;\"\u003e\u003cstrong\u003eParameters\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp\u003e\u003cstrong\u003eAperture size\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd colspan=\"2\"\u003e\n\u003cp\u003e\u003cstrong\u003e71mm\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp\u003e\u003cstrong\u003eFocal length\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd colspan=\"2\"\u003e\n\u003cp\u003e\u003cstrong\u003e490mm\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp\u003e\u003cstrong\u003eFocal ratio\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd colspan=\"2\"\u003e\n\u003cp\u003e\u003cstrong\u003ef\/6.9\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp\u003e\u003cstrong\u003eObjective lens\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd colspan=\"2\"\u003e\n\u003cp\u003e\u003cstrong\u003eQuadruplet air-spaced APO(including one ED glass)\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp\u003e\u003cstrong\u003eImage circle\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd colspan=\"2\"\u003e\n\u003cp\u003e\u003cstrong\u003e44mm\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp\u003e\u003cstrong\u003eMaximum accessory connection (with the focuser fully retreated)\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\n\u003cp\u003e\u003cstrong\u003eImaging mode:\u003c\/strong\u003e   \u003cbr\u003e\u003cstrong\u003e82.5mm (from the base of M48×0.75 male thread）\u003c\/strong\u003e   \u003cbr\u003e\u003cstrong\u003e100.5mm（from the base of M54×0.75 male thread)\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\n\u003cp\u003e\u003cstrong\u003eObserving mode:\u003c\/strong\u003e   \u003cbr\u003e\u003cstrong\u003e111mm（from the end of 1.25\" eyepiece holder）\u003c\/strong\u003e   \u003cbr\u003e\u003cstrong\u003e121mm（from the end of 2\" eyepiece holder）\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eMinimum accessory connection (with the focuser fully extended)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\n\u003cstrong\u003eImaging mode:\u003c\/strong\u003e   \u003cbr\u003e\u003cstrong\u003e32.5mm (from the base of M48×0.75 male thread）\u003c\/strong\u003e   \u003cbr\u003e\u003cstrong\u003e50.5mm（from the base of M54×0.75 male thread)\u003c\/strong\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\n\u003cstrong\u003eObserving mode:\u003c\/strong\u003e   \u003cbr\u003e\u003cstrong\u003e61mm（from the end of 1.25\" eyepiece holder）\u003c\/strong\u003e   \u003cbr\u003e\u003cstrong\u003e71mm（from the end of 2\" eyepiece holder）\u003c\/strong\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp\u003e\u003cstrong\u003eTotal length\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd colspan=\"2\"\u003e\n\u003cp\u003e\u003cstrong\u003e372.5mm(including 1.25\" adapter as dew shield contracted）\u003c\/strong\u003e   \u003cbr\u003e\u003cstrong\u003e430.9mm(including 1.25\" adapter as dew shield fully stretched）\u003c\/strong\u003e   \u003cbr\u003e\u003cstrong\u003e415mm(including the photographic adapter as dew shield contracted）\u003c\/strong\u003e   \u003cbr\u003e\u003cstrong\u003e473.4mm(including the photographic adapter as dew shield fully stretched）\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eFocuser travel length\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd colspan=\"2\"\u003e\u003cstrong\u003e50mm\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp\u003e\u003cstrong\u003eNet weight\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd colspan=\"2\"\u003e\n\u003cp\u003e\u003cstrong\u003e2.5kg\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp\u003e\u003cstrong\u003eGross weight(Including tube ring\u0026amp;dovetail plate）\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd colspan=\"2\"\u003e\n\u003cp\u003e\u003cstrong\u003e3.0kg\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp\u003e\u003cstrong\u003eRear-end thread type:\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd colspan=\"2\"\u003e\n\u003cp\u003e\u003cstrong\u003eM64×0.75-M54×0.75\u003c\/strong\u003e   \u003cbr\u003e\u003cstrong\u003eM54×0.75-M54×0.75\u003c\/strong\u003e   \u003cbr\u003e\u003cstrong\u003eM54×0.75-M48×0.75 (with M48×0.75 filter thread)\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp\u003e\u003cstrong\u003eStandard package items\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd colspan=\"2\"\u003e\n\u003cp\u003e\u003cstrong\u003eA 71F OTA, a pair of tube rings, a handle, a Vixen 230mm dovetail plate,\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003ea set of photographic adapters\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/figure\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cstrong\u003eProduct Size Diagram\u003c\/strong\u003e \u003c\/p\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/Screenshot_2025-12-27_at_2.50.59_PM.png?v=1766872354\"\u003e\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cp\u003e\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/Screenshot_2025-12-27_at_2.51.14_PM.png?v=1766872354\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/Screenshot_2025-12-27_at_2.51.27_PM.png?v=1766872354\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/Screenshot_2025-12-27_at_2.51.46_PM.png?v=1766872354\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/Screenshot_2025-12-27_at_2.52.05_PM.png?v=1766872354\"\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cstrong\u003eThe Locking Screw Position Diagram\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/fb7489d3-de4a-4c26-bcae-55a86166d738_jpg.webp?v=1766872659\" alt=\"\"\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cstrong\u003eEAF (optional) Installation \u003c\/strong\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/6a4a88e7-e8b7-494c-b196-f987f67b375a_jpg.webp?v=1766872719\" alt=\"\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/Screenshot_2025-12-27_at_2.59.23_PM.png?v=1766872906\" alt=\"\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/Screenshot_2025-12-27_at_3.03.46_PM.png?v=1766873037\" alt=\"\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/Screenshot_2025-12-27_at_3.00.46_PM.png?v=1766872906\" alt=\"\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/Screenshot_2025-12-27_at_3.01.01_PM.png?v=1766872906\" alt=\"\"\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cstrong\u003eOptical Path Diagram \u003c\/strong\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/41058961-83a2-4a2d-a246-9f289d69c42b_jpg.webp?v=1766873133\"\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cstrong\u003eSpot Diagram\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/a91f2077-d8ca-4b0c-a2e2-fb08ce115b2b_jpg.webp?v=1766873169\"\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cstrong\u003eImages\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/29991370-eec8-42c2-888d-247a7c31fc55_jpg.webp?v=1766873258\"\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cmeta charset=\"UTF-8\"\u003eNerci Flückiger  | Wolf's Cave - Barnard 175 | Askar 71F Flat-Field + ZWO ASI2600MC Pro\u003c\/p\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/d4c37ab5-6897-401b-9f15-857923edd524_jpg.webp?v=1766873262\"\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cmeta charset=\"UTF-8\"\u003eÁkos Takács | NGC6888 Crescent Nebula | ASKAR 71 Flat-field + ZWO ASI533MC Pro\u003c\/p\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/d98537fc-e927-48d3-9cbd-60aa673e66fb.jpg?v=1766873259\"\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cmeta charset=\"UTF-8\"\u003eKeon-Ho Lee  | NGC7000  |  ASKAR 71 Flat-field + Nikon Cooled Z6\u003c\/p\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/b3b3cf7a-b2d3-4765-9dad-52500eb8b4bd.jpg?v=1766873262\"\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cmeta charset=\"UTF-8\"\u003eSandwall  | M42  |  ASKAR 71 Flat-field + ASI2600MC\u003c\/p\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/68c585bc-1160-4651-991b-b2d2bb3cfdcb.jpg?v=1766873251\"\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cmeta charset=\"UTF-8\"\u003eDonn Miller | M51 The Whirlpool Galaxy | ASKAR 71 Flat-field + Player one Uranus C pro IMX585\u003c\/p\u003e","brand":"Askar","offers":[{"title":"Default Title","offer_id":47583458197763,"sku":"71F","price":599.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/960dd318-21f0-427a-8225-4be7d1f01151_png_1180xaf_png.webp?v=1766871047"},{"product_id":"111f-flat-field","title":"111F Flat-Field","description":"\u003ch2\u003e\u003cbr\u003e\u003c\/h2\u003e\n\u003ch2\u003e4 1\/2\" Apo Refractor, Good for Imaging and Visual\u003c\/h2\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch2\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/4151fb7a-2f81-4a82-a1e8-0580db282b03.jpg?v=1780183610\" alt=\"\"\u003e\u003c\/h2\u003e\n\u003ch3\u003eDescription\u003c\/h3\u003e\n\u003cp\u003eAskar's new 111F quad refractor offers sharp images and versatility at a reasonable price. \u003c\/p\u003e\n\u003cp\u003eThe 111F's optics cover a \u003cem\u003efull-frame \u003c\/em\u003eimager, without the need for a field flattener. Backfocus distance doesn't need to be precise, making astrophotography simpler with filter drawers, OAGs, and other accessories.  The 111F's 766mm focal length gives you a 2.7° field of view on the long side of your full-frame imager, 1.8° with APS-C cameras, and 1.0° with a 1\" (2.7x crop factor) camera.\u003c\/p\u003e\n\u003cp\u003e\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/FOV_118e613b-ba9c-4f42-9030-97698e47b7e4.jpg?v=1778806384\"\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cstrong\u003eFields of view with full-frame, APS-C, and 1\" (2.7x crop \u003c\/strong\u003e\u003cb\u003efactor) cameras\u003c\/b\u003e\u003c\/p\u003e\n\u003cp\u003eUnlike many contemporary refractors, this one can be used for visual observations, as well. (\u003cem\u003eYou'll need to provide your own finderscope, diagonal, and eyepieces\u003c\/em\u003e.)  With a 2\" diagonal and a good 35mm wide-field eyepiece, you'd get about 22x and a 3° field—wide enough to fit the Andromeda Galaxy, or the Pleiades Cluster (M45). And yet the 111F will respond well to high-power views with a short eyepiece, too—great for planets! \u003c\/p\u003e\n\u003cp\u003e\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/IC_443_dd8f84f3-667c-45b7-a6f1-938338d1a457_jpg.webp?v=1778807154\"\u003e\u003c\/p\u003e\n\u003ch4 style=\"text-align: center;\"\u003e\n\u003cmeta charset=\"UTF-8\"\u003e \u003cstrong\u003e ic443  |  Askar 111F+ Touptek atr2600m\u003c\/strong\u003e\n\u003c\/h4\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/Screenshot2026-05-30at5.16.47PM.png?v=1780183610\" alt=\"\"\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch4\u003e\u003cstrong\u003eSpecifications\u003c\/strong\u003e\u003c\/h4\u003e\n\u003ctable style=\"width: 100%;\" class=\"ck-table-resized\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 38.282648%;\"\u003e\u003cstrong\u003eAperture size\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 60.286225%;\" colspan=\"2\"\u003e\u003cstrong\u003e111mm\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 38.282648%;\"\u003e\u003cstrong\u003eFocal length\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 60.286225%;\" colspan=\"2\"\u003e\u003cstrong\u003e766mm\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 38.282648%;\"\u003e\u003cstrong\u003eFocal ratio\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 60.286225%;\" colspan=\"2\"\u003e\u003cstrong\u003ef\/6.9\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 38.282648%;\"\u003e\u003cstrong\u003eObjective lens\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 60.286225%;\" colspan=\"2\"\u003e\u003cstrong\u003eQuadruplet air-spaced APO(including one ED glass)\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 38.282648%;\"\u003e\u003cstrong\u003eImage circle\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 60.286225%;\" colspan=\"2\"\u003e\u003cstrong\u003e44mm\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 38.282648%;\"\u003e\u003cstrong\u003eMaximum accessory connection (with the focuser fully retreated)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 30.232558%;\"\u003e\n\u003cstrong\u003eImaging mode: \u003c\/strong\u003e \u003cbr\u003e\u003cstrong\u003e73mm (from the base of M48×0.75 male thread）\u003c\/strong\u003e \u003cbr\u003e\u003cstrong\u003e91mm（from the base of M54×0.75 male thread)\u003c\/strong\u003e\n\u003c\/td\u003e\n\u003ctd style=\"width: 30.053667%;\"\u003e\n\u003cstrong\u003eObserving mode:  \u003c\/strong\u003e \u003cbr\u003e\u003cstrong\u003e132mm（from the end of 1.25\" eyepiece holder）\u003c\/strong\u003e \u003cbr\u003e\u003cstrong\u003e142mm（from the end of 2\" eyepiece holder）\u003c\/strong\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 38.282648%;\"\u003e\u003cstrong\u003eMinimum accessory connection (with the focuser fully extended)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 30.232558%;\"\u003e\n\u003cstrong\u003eImaging mode: \u003c\/strong\u003e \u003cbr\u003e\u003cstrong\u003e43mm (from the base of M48×0.75 male thread）\u003c\/strong\u003e \u003cbr\u003e\u003cstrong\u003e61mm（from the base of M54×0.75 male thread)\u003c\/strong\u003e\n\u003c\/td\u003e\n\u003ctd style=\"width: 30.053667%;\"\u003e\n\u003cstrong\u003eObserving mode:  \u003c\/strong\u003e \u003cbr\u003e\u003cstrong\u003e102mm（from the end of 1.25\" eyepiece holder）\u003c\/strong\u003e \u003cbr\u003e\u003cstrong\u003e112mm（from the end of 2\" eyepiece holder）\u003c\/strong\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 38.282648%;\"\u003e\u003cstrong\u003eTotal length\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 60.286225%;\" colspan=\"2\"\u003e\n\u003cstrong\u003e664mm(including 1.25\" adapter as dew shield contracted）\u003c\/strong\u003e \u003cbr\u003e\u003cstrong\u003e751mm(including 1.25\" adapter as dew shield fully stretched）\u003c\/strong\u003e \u003cbr\u003e\u003cstrong\u003e728mm(including the photographic adapter as dew shield contracted）\u003c\/strong\u003e \u003cbr\u003e\u003cstrong\u003e815mm(including the photographic adapter as dew shield fully stretched）\u003c\/strong\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 38.282648%;\"\u003e\u003cstrong\u003eFocuser travel length\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 60.286225%;\" colspan=\"2\"\u003e\u003cstrong\u003e30mm\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 38.282648%;\"\u003e\u003cstrong\u003eNet weight\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 60.286225%;\" colspan=\"2\"\u003e\u003cstrong\u003e5.74kg\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 38.282648%;\"\u003e\u003cstrong\u003eGross weight (Including tube ring\u0026amp;dovetail plate)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 60.286225%;\" colspan=\"2\"\u003e\u003cstrong\u003e6.76kg\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 38.282648%;\"\u003e\u003cstrong\u003eRear-end thread type\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 60.286225%;\" colspan=\"2\"\u003e\n\u003cstrong\u003eM78×1-M54×0.75        \u003c\/strong\u003e \u003cbr\u003e\u003cstrong\u003eM54×0.75-M54×0.75        \u003c\/strong\u003e \u003cbr\u003e\u003cstrong\u003eM54×0.75-M48×0.75  (with M48×0.75 filter thread)\u003c\/strong\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 38.282648%;\"\u003e\u003cstrong\u003eStandard package items\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 60.286225%;\" colspan=\"2\"\u003e\u003cstrong\u003e A 111F OTA，a pair of tube rings, a handle, a 300mm Vixen dovetail plate,a set of photographic adapters\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/Product_Size_Diagram_111F_454295a5-664d-43a2-9b8e-1b65a715a593_jpg.webp?v=1778807273\" alt=\"\"\u003e\u003c\/p\u003e\n\u003ch4 style=\"text-align: center;\"\u003eSpot Diagram\u003c\/h4\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/SpotDiagram_d3529dd7-ba1a-4553-af4b-787d4e747dc3_jpg.webp?v=1780183610\" alt=\"\"\u003e\u003c\/p\u003e\n\u003ch4 style=\"text-align: center;\"\u003eEAF Attachment Diagram \u003c\/h4\u003e\n\u003cp\u003e\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/ElectronicFocuserAssemblyDiagram_1acc5643-0b25-4789-a1b5-11c889ba55e2_jpg.webp?v=1780183611\"\u003e\u003c\/p\u003e\n\u003ch4 style=\"text-align: center;\"\u003e\u003cstrong\u003eLocking Screw Position Diagram\u003c\/strong\u003e\u003c\/h4\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/Locking_Screw_Position_Diagram_jpg_4d9d6d90-84d5-4f77-a35d-12ab68fda228.webp?v=1780187161\" alt=\"\"\u003e\u003c\/strong\u003e\u003c\/p\u003e","brand":"Askar","offers":[{"title":"Default Title","offer_id":48098665365763,"sku":"111F","price":1499.0,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/2ed602c5-1cec-48af-a7a2-9d1c71cf30d6.png_560xaf.webp?v=1778804388"},{"product_id":"131f-flat-field","title":"131F Flat-Field","description":"\u003ch2\u003e5\" Apo Refractor, Good for Imaging and Visual\u003c\/h2\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/Schematic_a91f8254-3b9e-4238-9ea1-896d6d9d6362.jpg?v=1780185879\" alt=\"\"\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch4\u003eDescription\u003c\/h4\u003e\n\u003cp\u003eAskar's new 131F Flat-Field quad refractor offers sharp images and versatility at a reasonable price. \u003c\/p\u003e\n\u003cp\u003eLike its smaller siblings, the 131F's optics cover \u003cem\u003efull-frame \u003c\/em\u003eimagers, without the need for a field flattener. Backfocus distance doesn't need to be precise, making astrophotography simpler when using filter drawers, OAGs, and other accessories.  \u003c\/p\u003e\n\u003cp\u003eThe 131F's 983mm focal length gives you a 2.1° field of view on the long side of your full-frame imager, 1.4° with APS-C cameras, and 0.77° with a 1\" (2.7x crop factor) camera.\u003c\/p\u003e\n\u003cp\u003e\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/Specs.png?v=1780185880\"\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/M27_73368be7-37b5-4d42-ab1e-ff18d444094f_jpg.webp?v=1780186107\" alt=\"\"\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cmeta charset=\"UTF-8\"\u003e\u003cmeta charset=\"UTF-8\"\u003e\u003cstrong\u003eNazmus Nasir  |  M27  |  ASKAR 131F Flat-Field\u003c\/strong\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003eUnlike astrograph refractors, the 131F can be used for visual observations, as well. (\u003cem\u003eYou'll need to provide your own finderscope, diagonal, and eyepieces\u003c\/em\u003e.)  With a 2\" diagonal and a good 35mm wide-field eyepiece, you'd get about 28x and a 2.4° field—wide enough to fit a lovely view of the Andromeda Galaxy, or the Pleiades Cluster (M45). The 131F will respond very well to high-power views with a short eyepiece, too—great for planets! \u003c\/p\u003e\n\u003ch4\u003eSpecifications\u003c\/h4\u003e\n\u003ctable\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eAperture size\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd colspan=\"2\"\u003e\u003cstrong\u003e131mm\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eFocal length\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd colspan=\"2\"\u003e\u003cstrong\u003e983mm\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eFocal ratio\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd colspan=\"2\"\u003e\u003cstrong\u003ef\/7.5\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eObjective lens\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd colspan=\"2\"\u003e\u003cstrong\u003eQuadruplet air-spaced APO(including one ED glass)\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eImage circle\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd colspan=\"2\"\u003e\u003cstrong\u003e44mm\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eMaximum accessory connection (with the focuser fully retreated)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\n\u003cstrong\u003eImaging mode: \u003c\/strong\u003e  \u003cbr\u003e\u003cstrong\u003e73mm (from the base of M48×0.75 male thread）\u003c\/strong\u003e  \u003cbr\u003e\u003cstrong\u003e91mm（from the base of M54×0.75 male thread)\u003c\/strong\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\n\u003cstrong\u003eObserving mode:  \u003c\/strong\u003e  \u003cbr\u003e\u003cstrong\u003e131mm（from the end of 1.25\" eyepiece holder）\u003c\/strong\u003e  \u003cbr\u003e\u003cstrong\u003e141mm（from the end of 2\" eyepiece holder）\u003c\/strong\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eMinimum accessory connection (with the focuser fully extended)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\n\u003cstrong\u003eImaging mode: \u003c\/strong\u003e  \u003cbr\u003e\u003cstrong\u003e43mm (from the base of M48×0.75 male thread）\u003c\/strong\u003e  \u003cbr\u003e\u003cstrong\u003e61mm（from the base of M54×0.75 male thread)\u003c\/strong\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\n\u003cstrong\u003eObserving mode:  \u003c\/strong\u003e  \u003cbr\u003e\u003cstrong\u003e101mm（from the end of 1.25\" eyepiece holder）\u003c\/strong\u003e  \u003cbr\u003e\u003cstrong\u003e111mm（from the end of 2\" eyepiece holder）\u003c\/strong\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eTotal length\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd colspan=\"2\"\u003e\n\u003cstrong\u003e878mm(including 1.25\" adapter as dew shield contracted）\u003c\/strong\u003e  \u003cbr\u003e\u003cstrong\u003e963mm(including 1.25\" adapter as dew shield fully stretched）\u003c\/strong\u003e  \u003cbr\u003e\u003cstrong\u003e941mm(including the photographic adapter as dew shield contracted）\u003c\/strong\u003e  \u003cbr\u003e\u003cstrong\u003e1026mm(including the photographic adapter as dew shield fully stretched）\u003c\/strong\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eFocuser travel length\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd colspan=\"2\"\u003e\u003cstrong\u003e30mm\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eNet weight\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd colspan=\"2\"\u003e\u003cstrong\u003e7.9kg\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eGross weight (Including tube ring\u0026amp;dovetail plate)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd colspan=\"2\"\u003e\u003cstrong\u003e9.4kg\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eRear-end thread type\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd colspan=\"2\"\u003e\n\u003cstrong\u003eM78×1-M54×0.75        \u003c\/strong\u003e  \u003cbr\u003e\u003cstrong\u003eM54×0.75-M54×0.75        \u003c\/strong\u003e  \u003cbr\u003e\u003cstrong\u003eM54×0.75-M48×0.75  (with M48×0.75 filter thread)\u003c\/strong\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eStandard package items\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd colspan=\"2\"\u003e\u003cstrong\u003e A 131F OTA，a pair of tube rings, a handle, a 300mm Losmandy dovetail plate,a set of photographic adapters\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/Product_Size_Diagram_8a883eef-96d8-4147-a206-fe1420dd4855_jpg.webp?v=1778881371\"\u003e\u003c\/p\u003e\n\u003ch4 style=\"text-align: center;\"\u003eLocking Screw Position Diagram\u003c\/h4\u003e\n\u003cp\u003e\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/Locking_Screw_Position_Diagram_37f4ab88-3b9a-4c66-88f2-1674920272bb_jpg.webp?v=1780185878\"\u003e\u003c\/p\u003e\n\u003ch4 style=\"text-align: center;\"\u003eElectronic Focuser Assembly Diagram\u003c\/h4\u003e\n\u003cp\u003e\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/Electronic_Focuser_Assembly_Diagram_1acc5643-0b25-4789-a1b5-11c889ba55e2_jpg.webp?v=1780185880\"\u003e\u003c\/p\u003e\n\u003ch4 style=\"text-align: center;\"\u003eSpot Diagram\u003c\/h4\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/Spot_Diagram_96389167-369e-4ff4-bbd2-43768e5ac17d_jpg.webp?v=1780185879\" alt=\"\"\u003e\u003c\/p\u003e","brand":"Askar","offers":[{"title":"Default Title","offer_id":48098670182659,"sku":"131F","price":1999.0,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/a0c079cb-078d-40a4-9c86-951ad3cf6c91_png_560xaf_png.webp?v=1778880154"},{"product_id":"askar-50p","title":"Askar 50P","description":"\u003ch2\u003e\u003cspan\u003eA portable, versatile 50mm quadruplet APO astrograph\u003c\/span\u003e\u003c\/h2\u003e\n\u003cp\u003e\u003cspan\u003eAskar's petite new 50P Petzval optic provides sharp images with APS-C and smaller cameras, providing wide-angle views and fast, f\/3.8 imaging. With its 190mm focal length, you'll get \u003cstrong\u003ea roughly 7° field across the long side of APS-C cameras, and a still-wide 3.4° with the popular ASI585 cameras...  \u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cstrong\u003eThis is a great choice for beginners:\u003c\/strong\u003e The 50P's light weight makes it ideal for use on small tracking mounts like SkyWatcher's GTi and its relatively low magnification is \u003c\/span\u003eforgiving of minor errors in tracking and polar alignment. \u003cspan\u003eBecause of its Petzval design, there's no need for precise backfocus, either—anywhere from 50-65mm will work well, \u003cem\u003eeasy-peasy\u003c\/em\u003e. \u003c\/span\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/RhoOph_54b82429-01e2-4c64-a92a-04c1d852a08f.webp?v=1778803203\"\u003e\u003cmeta charset=\"UTF-8\"\u003e\u003cstrong\u003e ρ Ophiuchi cloud complex  |  Askar 50P+ZWO ASI2600MC\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: left;\"\u003e \u003c\/p\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/Monoceros_7392dbd7-9d63-4469-aba3-b5ef2d063629.webp?v=1778803547\" alt=\"\"\u003e\u003cmeta charset=\"UTF-8\"\u003e\u003cstrong\u003eMonoceros  |  Askar 50P+ZWO ASI2600MC\u003c\/strong\u003e\u003c\/p\u003e\n\u003ch4 style=\"text-align: left;\"\u003eSpecifications\u003c\/h4\u003e\n\u003ctable border=\"0\" cellspacing=\"0\" align=\"center\" class=\"ck-table-resized\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp\u003e\u003cstrong\u003eAperture size\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\n\u003cp\u003e\u003cstrong\u003e50mm\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp\u003e\u003cstrong\u003eFocal length\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\n\u003cp\u003e\u003cstrong\u003e190mm \u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp\u003e\u003cstrong\u003eFocal ratio\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\n\u003cp\u003e\u003cstrong\u003ef\/3.8\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp\u003e\u003cstrong\u003eObjective lens\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\n\u003cp\u003e\u003cstrong\u003eQuadruplet petzval APO（including one piece of SD glass）\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp\u003e\u003cstrong\u003eTotal length\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\n\u003cp\u003e\u003cstrong\u003e147mm(when the dew shield is contracted)\u003c\/strong\u003e           \u003cbr\u003e\u003cstrong\u003e182mm(when the dew shield is stretched)\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp\u003e\u003cstrong\u003eFormat specifications\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\n\u003cp\u003e\u003cstrong\u003eAPS-C format（optimized for 1-inch sensors）\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp\u003e\u003cstrong\u003eGross weight（including tube ring and dovetail plate）\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\n\u003cp\u003e\u003cstrong\u003e1.4kg\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp\u003e\u003cstrong\u003eRear-end thread type\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\n\u003cp\u003e\u003cstrong\u003eM48 adapter (with M48×0.75 filter thread)\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp\u003e\u003cstrong\u003eRear-end connection distance\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\n\u003cp\u003e\u003cstrong\u003eSupport 50-65mm range (Recommended connection length is 55mm)\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp\u003e\u003cstrong\u003eStandard package items\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\n\u003cp\u003e\u003cstrong\u003eA 50P OTA，a manual\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/ProductSizeDiagram_4b592863-0c9e-40b2-af5a-7881ceb98918.webp?v=1778804032\" alt=\"\"\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e","brand":"Askar","offers":[{"title":"Default Title","offer_id":48098677850371,"sku":"50P","price":299.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/fd22151f-9688-4d74-ab62-6388127e4d1d.webp?v=1778801578"},{"product_id":"sqa60","title":"SQA60","description":"\u003ch2 style=\"text-align: left;\"\u003e\u003cstrong\u003e\u003cspan\u003eA wide-field, high-performance Petzval astrograph, featuring SD glass elements for sharp images.\u003c\/span\u003e\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cp style=\"text-align: center;\"\u003e \u003c\/p\u003e\n\u003ch4 style=\"text-align: left;\"\u003eDescription\u003c\/h4\u003e\n\u003cp\u003eThis well-corrected instrument provides a short, 276mm focal length for wide images: about 7.2° with a full-frame camera, around 5° with APS-C imagers (ASI2600 series, Nikon DX, Canon Rebels, Sony A6xxx, etc.), and around 3.5° with 4\/3 cameras (ASI294 series, Olympus and Panasonic mirrorless, etc.  With its 6-element design (including two with Slow-dispersion glass), this scope delivers sharp images out to the edges of your field. The design also minimizes vignetting, delivering about 95% of the center's illumination at the far edges! \u003c\/p\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/Intro_HERO_8cc42bcf-276b-40a4-bf03-876c09591455.jpg?v=1780189521\"\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/Hero2_21ae88eb-1f4e-4e8c-b99a-5c35a268786e_jpg.webp?v=1780189636\"\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/Hero3_87c4591f-f24d-4d94-9254-2bcb89309554.jpg?v=1780189705\"\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/Hero4_ac0a0c53-3320-4069-9c6c-c3eab6d939be.jpg?v=1780189734\" alt=\"\"\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/TubeRings_9ca317ee-112f-4eda-a15e-dd125041d915.jpg?v=1780189150\" alt=\"\"\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/DOVETAILPLATE_a35b8584-c092-4305-8b82-3fd47c90fdf1.jpg?v=1780189150\"\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/DualSpeedFocuser_14a1e875-3c58-4057-864b-b7ca6cf5badf.jpg?v=1780189150\"\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/FINDERBASES_9cfa162b-84a7-4833-898d-9c5124fdf7c6.jpg?v=1780189150\" alt=\"\"\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/REARADAPTER_c57b18a5-8ec5-48da-9ce9-6a079cb520fe.jpg?v=1780189150\"\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/1-SPOT_3a9bc0f-07fb-49e3-be12-d880a47961f4.jpg?v=1780189980\"\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/2-Relative_Illum_a75cf60a-176f-4c21-a4ae-6176f4f46816.jpg?v=1780190019\"\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/3--LAYOUT_0a1cf1b6-12b3-4fdf-813c-3f1a26b7e818.jpg?v=1780190048\" alt=\"\"\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/4-Case_4c988e85-3b2a-46c8-8e6a-ffe0544e925f.jpg?v=1780190110\"\u003e\u003c\/p\u003e\n\u003ch4 style=\"text-align: center;\"\u003e\n\u003cstrong\u003eSpecifications\u003c\/strong\u003e\u003cstrong\u003e\u003c\/strong\u003e\n\u003c\/h4\u003e\n\u003ctable align=\"center\" cellspacing=\"0\" width=\"84.20%\" border=\"0\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd class=\"responsive-title\" colspan=\"3\"\u003e\u003cstrong\u003eParameters\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp\u003e\u003cstrong\u003eAperture size\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd colspan=\"2\"\u003e\n\u003cp\u003e\u003cstrong\u003e60mm\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp\u003e\u003cstrong\u003eFocal length\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd colspan=\"2\"\u003e\n\u003cp\u003e\u003cstrong\u003e276mm \u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp\u003e\u003cstrong\u003eFocal ratio\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd colspan=\"2\"\u003e\n\u003cp\u003e\u003cstrong\u003ef\/4.6\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp\u003e\u003cstrong\u003eObjective lens\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd colspan=\"2\"\u003e\n\u003cp\u003e\u003cstrong\u003eSextuplet petzval APO (includes 2 pieces of SD glass )\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp\u003e\u003cstrong\u003eTotal length\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd colspan=\"2\"\u003e\n\u003cp\u003e\u003cstrong\u003e283mm\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp\u003e\u003cstrong\u003eFormat specifications\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd colspan=\"2\"\u003e\n\u003cp\u003e\u003cstrong\u003eFull frame(44mm)\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp\u003e\u003cstrong\u003eOTA weight\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd colspan=\"2\"\u003e\n\u003cp\u003e\u003cstrong\u003e2.79kg\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp\u003e\u003cstrong\u003eGross weight（including tube ring and dovetail plate）\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd colspan=\"2\"\u003e\n\u003cp\u003e\u003cstrong\u003e3.54kg\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp\u003e\u003cstrong\u003eRear-end thread type\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd colspan=\"2\"\u003e\n\u003cp\u003e\u003cstrong\u003eM48 adapter (with M48×0.75 filter thread)\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp\u003e\u003cstrong\u003eRear-end connection distance\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd colspan=\"2\"\u003e\n\u003cp\u003e\u003cstrong\u003eSupport 41-66mm range (Recommended connection length is 55mm)\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp\u003e\u003cstrong\u003eStandard package items\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd colspan=\"2\"\u003e\n\u003cp\u003e\u003cstrong\u003ea SQA60pro OTA, an Oxford cloth case\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch4 style=\"text-align: center;\"\u003e\u003cstrong\u003e\u003c\/strong\u003e\u003c\/h4\u003e\n\u003ch4 style=\"text-align: center;\"\u003e\u003cstrong\u003eProduct Size Diagram\u003c\/strong\u003e\u003c\/h4\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cstrong\u003e\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/5-Product_Size_Diagram_70.jpg?v=1780191206\"\u003e\u003c\/strong\u003e\u003cstrong\u003eLocking Screw Position Diagram\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/6-Locking_Screw_Position_3e96c7b0-e46e-485f-ae92-5b641f56933c_jpg.webp?v=1780190774\" alt=\"\"\u003e\u003c\/p\u003e\n\u003ch4 style=\"text-align: center;\"\u003eElectronic Focuser Assembly Diagram\u003c\/h4\u003e\n\u003cp\u003e\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/7-Electronic_Focuser_Assembly_Diagram_70.jpg?v=1780191425\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/1-M81_and_M82_1e56440c-e98d-42a2-8a46-4c3287a2a583_jpg.webp?v=1780191633\"\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cmeta charset=\"UTF-8\"\u003e\u003cmeta charset=\"UTF-8\"\u003e\u003cstrong\u003e阿强  |  M81\u0026amp;M82  |  Askar SQA60pro + ZWO ASI2600MC\u003c\/strong\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cstrong\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/2_M81_and_M82_f1de5b71-cb74-4890-afa5-c70e4f209d7b_jpg.webp?v=1780191648\" alt=\"\"\u003e\u003cmeta charset=\"UTF-8\"\u003e阿强  |  M81\u0026amp;M82  |  Askar SQA60pro + ZWO ASI2600MC\u003c\/strong\u003e\u003cstrong\u003e\u003c\/strong\u003e\u003c\/p\u003e","brand":"Askar","offers":[{"title":"Default Title","offer_id":48212468269315,"sku":"SQA60","price":1280.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/SQA60-1.png?v=1785336346"},{"product_id":"zwo-70mm-quad-apo-refractor","title":"ZWO 70mm Quad APO Refractor","description":"\u003cp dir=\"ltr\"\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003cp dir=\"ltr\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/FF70_PrincipalKV.jpg?v=1781062466\" alt=\"\" style=\"font-size: 0.875rem;\"\u003e\u003cspan\u003e\u003cimg\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp dir=\"ltr\"\u003e\u003cspan\u003eThe FF70 APO uses a quadruplet air-spaced APO lens design, including one piece of ED glass. It supports 44mm, \u003cem\u003efull-frame \u003c\/em\u003eimaging. \u003c\/span\u003e\u003c\/p\u003e\n\u003cp dir=\"ltr\"\u003e\u003cspan\u003eWith an aperture of 70mm, a focal length of 490mm, and a \u003c\/span\u003e\u003cspan\u003enative focal ratio of f\/7.0, the FF70 APO is versatile and \u003cem\u003ecan be used for both visual \u003c\/em\u003e\u003c\/span\u003e\u003cem\u003eobservation and astrophotography.\u003c\/em\u003e\u003c\/p\u003e\n\u003cp dir=\"ltr\"\u003e\u003cimg style=\"font-size: 0.875rem;\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/70icon_d9222317-9ef9-4ef2-a914-e6a393a97f38.jpg?v=1781063675\" alt=\"\"\u003e\u003cspan\u003eThe telescope's\u003c\/span\u003e\u003cspan\u003e self-flattened design means no more precisely calculating your backfocus—if you're achieving focus, \u003cem\u003eyou'll get sharp stars, period. \u003c\/em\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp dir=\"ltr\"\u003e\u003cspan\u003eThis also means \u003cem\u003ethere's no need for a separate field flattene\u003c\/em\u003er—your stars will sharp all the way to the \u003c\/span\u003ecorners, straight out of the box.\u003c\/p\u003e\n\u003cp dir=\"ltr\"\u003e\u003cspan\u003eThe FF70 APO OTA weighs only \u003cspan style=\"color: rgb(0, 0, 0);\"\u003e2.5kg and the gross weight, including the tube rings and dovetail plate, is 3kg—about 6.5 pounds. \u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp dir=\"ltr\"\u003e\u003cspan\u003eThe FF70 APO also comes standard with a photographic extension tube\u003c\/span\u003e\u003cspan\u003e, \u003c\/span\u003e\u003cspan\u003eincluding M48\u003c\/span\u003e\u003cspan\u003e*\u003c\/span\u003e\u003cspan\u003e0.75 and M54\u003c\/span\u003e\u003cspan\u003e*\u003c\/span\u003e\u003cspan\u003e0.75 adapters\u003c\/span\u003e\u003cspan\u003e, which work well with modern cameras. It also provides\u003c\/span\u003e\u003cspan\u003e a built-in \u003c\/span\u003e\u003cspan\u003e2\u003c\/span\u003e\u003cspan\u003e-inch \u003c\/span\u003e\u003cspan\u003efilter \u003c\/span\u003e\u003cspan\u003ethread, in case you don't have a filter drawer yet\u003c\/span\u003e\u003cspan\u003e. \u003c\/span\u003e\u003c\/p\u003e\n\u003cp dir=\"ltr\"\u003e\u003cspan\u003eThe handle bar of FF70 APO\u003c\/span\u003e\u003cspan\u003e \u003c\/span\u003e\u003cspan\u003edoubles guide scope mount, and\u003c\/span\u003e\u003cspan\u003e \u003c\/span\u003e\u003cspan\u003ethere are two additional \u003c\/span\u003e\u003cspan\u003efinder bases on both sides of the focuser, providing additional mounting positions for other astronomical accessories\u003c\/span\u003e\u003cspan\u003e.  (This is a great place to mount an ASI AIR!)\u003c\/span\u003e\u003c\/p\u003e\n\u003cp dir=\"ltr\"\u003e\u003cspan\u003eThe FF70 APO boasts a rigid, dual-speed R\u0026amp;P \u003c\/span\u003e\u003cspan\u003e2.4\u003c\/span\u003e\u003cspan\u003e-inch\u003c\/span\u003e\u003cspan\u003e focuser, which has a 1:10 fine adjustment and a 360° scale field rotator at the \u003c\/span\u003e\u003cspan\u003erear end for precise angle adjustment. \u003c\/span\u003e\u003cspan\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp dir=\"ltr\"\u003e\u003cspan\u003eThe dew shield of the FF70 APO is a retractable design, further shortening the overall length and increasing portability. The entire lens tube of the FF70 APO is crafted using high-quality CNC machining. The inside of the FF70 APO's dew shield is covered with matting paint to effectively reduce stray light reflections. \u003c\/span\u003e\u003c\/p\u003e\n\u003ch4 dir=\"ltr\"\u003e\u003cspan\u003eMain Features\u003c\/span\u003e\u003c\/h4\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/Highlights_0c3af87a-5552-46ed-b337-11b582f95d14.jpg?v=1781063810\" alt=\"\"\u003e\u003c\/p\u003e\n\u003ch4 class=\"MsoNormal\" align=\"left\"\u003e\u003cb\u003e\u003cspan\u003eFour-Element Optical Design\u003c\/span\u003e\u003c\/b\u003e\u003c\/h4\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cb\u003e\u003cspan\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/Four-ElementOpticalDesign.jpg?v=1780980251\" alt=\"\"\u003e\u003c\/span\u003e\u003c\/b\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cmeta charset=\"UTF-8\"\u003e\u003cb\u003e\u003cspan\u003e44 mm Image Circle — Full-Frame Support\u003c\/span\u003e\u003c\/b\u003e\u003cspan\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/Full-FrameSupport.jpg?v=1780980251\" alt=\"\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003ch4 align=\"left\" class=\"MsoNormal\"\u003e\n\u003cb\u003e\u003cspan\u003eConvenient Design\u003c\/span\u003e\u003c\/b\u003e\u003cspan\u003e\u003c\/span\u003e\n\u003c\/h4\u003e\n\u003cp\u003e\u003cb\u003e\u003cspan\u003e\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/Focusadjustment.jpg?v=1780980251\"\u003e\u003c\/span\u003e\u003c\/b\u003e\u003c\/p\u003e\n\u003ch4 align=\"left\" class=\"MsoNormal\"\u003eStarfield Map\u003c\/h4\u003e\n\u003cp align=\"left\" class=\"MsoNormal\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/Bitmap_image_ba8b72c8-3566-49f4-a8c7-62d5b92c70a8.jpg?v=1781064321\" alt=\"\"\u003e\u003c\/p\u003e\n\u003ch4 align=\"left\" class=\"MsoNormal\"\u003eSpecifications\u003c\/h4\u003e\n\u003cp align=\"left\" class=\"MsoNormal\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/ff70_Product_parameters.jpg?v=1781064559\" alt=\"\"\u003e\u003c\/p\u003e","brand":"ZWO","offers":[{"title":"Default Title","offer_id":48334258471171,"sku":"ZWO FF70-APO","price":599.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/FF70APO1_1296x_14e1bb33-cdcb-43bd-93f2-0e6195ddde52.webp?v=1781121589"},{"product_id":"zwo-90mm-quad-apo-refractor","title":"ZWO 90mm Quad APO Refractor","description":"\u003cp dir=\"ltr\"\u003e\u003cspan\u003e\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/FF90_10d7eaed-86a5-427a-9e2d-1d318ee3682f.jpg?v=1781064779\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp dir=\"ltr\"\u003e\u003cstrong\u003eIf this scope looks familiar, that's because it is the ZWO rebrand of the Askar 91 F-Series.\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp dir=\"ltr\"\u003e\u003cspan\u003eThe  FF90 APO's  609mm f\/6.8 optics cover a \u003cem\u003efull-frame, 44mm \u003c\/em\u003eimaging circle,\u003c\/span\u003e\u003cspan\u003e and \u003cem\u003ecan be used for both visual \u003c\/em\u003e\u003c\/span\u003e\u003cem\u003eobservation and astrophotography. \u003c\/em\u003e\u003c\/p\u003e\n\u003cp dir=\"ltr\"\u003e\u003cspan\u003eThe telescope's\u003c\/span\u003e\u003cspan\u003e four-element design—including an ED element—means no more precisely calculating your backfocus—if you've got accurate focus, \u003cem\u003eyou'll get sharp stars out to the edges of your image.\u003c\/em\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp dir=\"ltr\"\u003e\u003cspan\u003eThis also means \u003cem\u003ethere's no need for a separate field flattene\u003c\/em\u003er—your stars will be sharp all the way to the \u003c\/span\u003ecorners, straight out of the box. \u003c\/p\u003e\n\u003cp dir=\"ltr\"\u003e\u003cspan\u003eThe FF90 APO OTA weighs o\u003cspan style=\"color: rgb(0, 0, 0);\"\u003enly 3.9 kg and the gross weight, including the tube rings and dovetail plate, is 4.5 kg—about 10 pounds.\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp dir=\"ltr\"\u003e\u003cspan\u003eThe FF90 APO also comes standard with a photographic extension tube\u003c\/span\u003e\u003cspan\u003e, \u003c\/span\u003e\u003cspan\u003eincluding M48\u003c\/span\u003e\u003cspan\u003e*\u003c\/span\u003e\u003cspan\u003e0.75 and M54\u003c\/span\u003e\u003cspan\u003e*\u003c\/span\u003e\u003cspan\u003e0.75 adapters\u003c\/span\u003e\u003cspan\u003e, which work well with modern cameras. It also provides\u003c\/span\u003e\u003cspan\u003e a built-in \u003c\/span\u003e\u003cspan\u003e2\u003c\/span\u003e\u003cspan\u003e-inch \u003c\/span\u003e\u003cspan\u003efilter \u003c\/span\u003e\u003cspan\u003ethread inside the M48 adapter, in case you don't have a filter drawer yet\u003c\/span\u003e\u003cspan\u003e. \u003c\/span\u003e\u003c\/p\u003e\n\u003cp dir=\"ltr\"\u003e\u003cspan\u003eThe handlebar of FF90 APO\u003c\/span\u003e\u003cspan\u003e \u003c\/span\u003e\u003cspan\u003edoubles guide scope mount, and\u003c\/span\u003e\u003cspan\u003e \u003c\/span\u003e\u003cspan\u003ethere are two additional \u003c\/span\u003e\u003cspan\u003efinder bases on both sides of the focuser, providing additional mounting positions for other astronomical accessories\u003c\/span\u003e\u003cspan\u003e.  (This is a great place to mount an ASI AIR!)\u003c\/span\u003e\u003c\/p\u003e\n\u003cp dir=\"ltr\"\u003e\u003cspan\u003eThe FF90 AP\u003cspan style=\"color: rgb(0, 0, 0);\"\u003eO boasts a rigid, dual-speed rack-and-pinion\u003c\/span\u003e\u003c\/span\u003e\u003cspan\u003e\u003cspan style=\"color: rgb(255, 42, 0);\"\u003e\u003cspan style=\"color: rgb(0, 0, 0);\"\u003e focuser,\u003c\/span\u003e \u003c\/span\u003ewhich has a 1:10 fine adjustment and a 360° scale field rotator at the \u003c\/span\u003e\u003cspan\u003erear end for precise angle adjustment. \u003c\/span\u003e\u003cspan\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp dir=\"ltr\"\u003e\u003cspan\u003eThe FF90's retractable dew shield  further shortens the overall length and increases portability. The entire lens tube is crafted using high-quality CNC machining. The inside of the FF90 APO's dew shield is covered with matting paint to effectively reduce stray light reflections. \u003c\/span\u003e\u003c\/p\u003e\n\u003cp dir=\"ltr\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/90icon.jpg?v=1780981156\" alt=\"\"\u003e\u003c\/p\u003e\n\u003cp dir=\"ltr\"\u003e \u003c\/p\u003e\n\u003ch4\u003eMain Features\u003c\/h4\u003e\n\u003cp\u003e\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/Highlights_1532c61a-0c40-4bf0-b877-f918d3f056bc.jpg?v=1781064996\"\u003e\u003c\/p\u003e\n\u003ch4\u003eUniqueness \u003cmeta charset=\"utf-8\"\u003e\n\u003c\/h4\u003e\n\u003cp\u003e\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/Lightweight_Compact_645eaef4-6232-4235-8b3d-13328c6fe994.jpg?v=1781065154\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/Four-Element_Optical_Design.jpg?v=1781065222\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/Full-Frame_Support.jpg?v=1781065296\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/Clamp_12aeb99e-ea03-4789-bafd-0a3d847dd2f0.jpg?v=1781065402\"\u003e\u003c\/p\u003e\n\u003ch4\u003ePerformance\u003c\/h4\u003e\n\u003cp\u003e\u003cem\u003eStar Field Map\u003c\/em\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cem\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/Bitmap_image_eeec432e-3678-4ed1-974d-a798627af484.jpg?v=1781065511\" alt=\"\"\u003e\u003c\/em\u003e\u003c\/p\u003e\n\u003ch4\u003eSpecifications \u003c\/h4\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/Product_parameters.jpg?v=1781065721\" alt=\"\"\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e","brand":"ZWO","offers":[{"title":"Default Title","offer_id":48334265385219,"sku":"ZWO FF90-APO","price":999.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/FF90APO1_1296x_8d9f2cdd-fd6e-42ed-ac5b-7334e91e26a6.webp?v=1781122036"},{"product_id":"zwo-110mm-quad-apo-refractor-copy","title":"ZWO 110mm Quad APO Refractor","description":"\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/image1_7155ff2b-e664-4cb2-8dee-7a3eb1de1021.jpg?v=1781041776\" alt=\"\"\u003e\u003cspan class=\"c0\"\u003eLightweight, compact, and engineered for both immersive visual observing and high-performance astrophotography.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/image3_a03e940c-a830-412b-9d07-d25c9180cc11.jpg?v=1781041776\" alt=\"\"\u003e\u003cmeta charset=\"UTF-8\"\u003e\u003cspan\u003e*Focus can be achieved within a back focus range of 42–73 mm, measured from the M54–M48 interface shoulder.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch4\u003e\u003cspan\u003eMAIN FEATURES\u003c\/span\u003e\u003c\/h4\u003e\n\u003cp\u003e\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/image2_6de36239-e719-483f-b5bd-e5ad00d2ac61.jpg?v=1781041776\"\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch4\u003e\u003cspan\u003eFlexible Connectivity for Multiple Configurations\u003c\/span\u003e\u003c\/h4\u003e\n\u003ch4\u003e\n\u003cspan\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/image5.jpg?v=1781041776\" alt=\"\"\u003e\u003c\/span\u003eUniqueness \u003cbr\u003e\n\u003c\/h4\u003e\n\u003cp class=\"c2\"\u003e\u003cspan class=\"c0\"\u003e1.)\u003c\/span\u003e\u003cem\u003e\u003cspan class=\"c0\"\u003e Four-Element Optical Design\u003c\/span\u003e\u003c\/em\u003e\u003c\/p\u003e\n\u003cp class=\"c2\"\u003e\u003cspan class=\"c0\"\u003eThe FF110 APO features a four-element, fully air-spaced apochromatic optical design. All four elements work together to deliver a flat imaging field without the need for an additional field flattener.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"c2\"\u003e\u003cspan\u003eOne ED (extra-low dispersion) glass element is incorporated to effectively reduce chromatic aberration, resulting in improved color correction and image clarity.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/image4_44eb76b3-110d-4a81-8ac5-f15b3374911e.jpg?v=1781041776\" alt=\"\"\u003e\u003c\/p\u003e\n\u003cp class=\"c2\"\u003e\u003cspan class=\"c0\"\u003e2.)  \u003cem\u003e44 mm Image Circle — Full-Frame Support\u003c\/em\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"c2\"\u003e\u003cspan class=\"c0\"\u003eWith a 44 mm image circle, the FF110 APO fully supports full-frame sensors and a wide range of imaging setups.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"c2\"\u003e\u003cspan class=\"c0\"\u003eIt delivers sharp star fields with excellent edge-to-edge performance, ensuring consistent image quality across the entire frame.\u003c\/span\u003e\u003cspan class=\"c0\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"c2\"\u003e\u003cspan class=\"c0\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/image7.jpg?v=1781041776\" alt=\"\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"c2\"\u003e\u003cspan class=\"c0\"\u003e3.) \u003cmeta charset=\"UTF-8\"\u003e\u003c\/span\u003e\u003cem\u003e\u003cspan class=\"c0\"\u003eNative Flat-Field Design\u003c\/span\u003e\u003c\/em\u003e\u003c\/p\u003e\n\u003cp class=\"c2\"\u003e\u003cspan class=\"c0\"\u003eThe FF110 APO features a native flat-field optical design, eliminating the need for an additional field flattener.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"c2\"\u003e\u003cspan class=\"c0\"\u003eNo complex back focus calculations or spacing adjustments are required—simply attach your imaging setup and start capturing once focus is achieved.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"c2 c4\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/image6_d651e5c6-8a0a-4475-ae8a-39901cc600e3.jpg?v=1781041776\" alt=\"\"\u003e\u003c\/p\u003e\n\u003ch4 class=\"c3\"\u003e\u003cspan class=\"c6\"\u003eConvenient Design\u003c\/span\u003e\u003c\/h4\u003e\n\u003cp class=\"c2\"\u003e\u003cspan class=\"c9\"\u003e1.) \u003cem\u003eCoarse \u0026amp; fine focus adjustment\u003c\/em\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"c2\"\u003e\u003cspan class=\"c0\"\u003eEquipped with a rigid 3-inch rack-and-pinion focuser, the FF110 APO offers precise control with a 1:10 coarse \u0026amp; fine focus adjustment mechanism.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"c2\"\u003e\u003cspan class=\"c0\"\u003eA built-in 360° rotator at the rear allows for smooth and accurate camera angle adjustments.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"c2\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/image9.jpg?v=1781041776\" alt=\"\"\u003e\u003c\/p\u003e\n\u003cp class=\"c2\"\u003e2.) \u003cem\u003e\u003cspan style=\"font-size: 0.875rem;\"\u003eRetractable Dew Shield\u003c\/span\u003e\u003c\/em\u003e\u003c\/p\u003e\n\u003cp class=\"c2\"\u003e\u003cspan class=\"c0\"\u003eThe FF110 APO features a retractable dew shield, reducing overall length for improved portability.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"c2\"\u003e\u003cspan class=\"c0\"\u003ePrecision CNC machining and a high-quality painted finish, combined with an internal anti-reflection coating, help minimize stray light and enhance image contrast.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"c2 c4\"\u003e \u003c\/p\u003e\n\u003cp class=\"c2\"\u003e\u003cspan class=\"c0\"\u003e3.) \u003cem\u003eQuick-Release Mounting Rings\u003c\/em\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"c2\"\u003e\u003cspan class=\"c0\"\u003eThe mounting rings are detachable, allowing for quick and easy setup or teardown of the telescope.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"c2\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/image8.jpg?v=1781041776\" alt=\"\"\u003e\u003c\/p\u003e\n\u003cp class=\"c2\"\u003e\u003cspan class=\"c0\"\u003e4.) \u003cem\u003ePhotography Extension Tube \u003c\/em\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"c2\"\u003e\u003cspan class=\"c0\"\u003eThe FF110 APO includes a photography extension tube with a 2-inch filter thread, along with rear adapters in M48×0.75 and M54×0.75 standards.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"c2\"\u003e\u003cspan class=\"c0\"\u003eThis allows for easy integration with a wide range of imaging accessories.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"c2\"\u003e\u003cspan class=\"c0\"\u003e\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/image12.jpg?v=1781041777\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003ch4 class=\"c3\"\u003e\u003cspan class=\"c6\"\u003ePerformance\u003c\/span\u003e\u003c\/h4\u003e\n\u003cp class=\"c2\"\u003e\u003cem\u003e\u003cspan class=\"c0\"\u003eOptical Layout\u003c\/span\u003e\u003c\/em\u003e\u003c\/p\u003e\n\u003cp class=\"c2\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/image10.jpg?v=1781041776\" alt=\"\"\u003e\u003c\/p\u003e\n\u003cp class=\"c2\"\u003e\u003cem\u003eStar Field Map\u003c\/em\u003e\u003c\/p\u003e\n\u003cp class=\"c2\"\u003e\u003cem\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/image11.jpg?v=1781041777\" alt=\"\"\u003e\u003c\/em\u003e\u003c\/p\u003e\n\u003ch4 class=\"c2\"\u003eProduct Diagram \u003c\/h4\u003e\n\u003cp class=\"c2\"\u003e\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/image13.jpg?v=1781041776\"\u003e\u003c\/p\u003e\n\u003cp class=\"c2\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/image14.jpg?v=1781041777\" alt=\"\"\u003e\u003c\/p\u003e\n\u003ch4 class=\"c2\"\u003eSpecifications\u003c\/h4\u003e\n\u003ch4 class=\"c2\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/image15.jpg?v=1781041777\" alt=\"\"\u003e\u003c\/h4\u003e\n\u003ch4 class=\"c2\"\u003eWhat's in the Box?\u003c\/h4\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/image16.jpg?v=1781041776\" alt=\"\"\u003e\u003c\/p\u003e","brand":"ZWO","offers":[{"title":"Default Title","offer_id":48334277116163,"sku":"ZWO FF110-APO","price":1499.0,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/FF110APO1_1296x_9d80b340-39af-4fea-b12d-7a8767410b3a.webp?v=1781122139"},{"product_id":"zwo-131mm-quad-apo-refractor","title":"ZWO 131mm Quad APO Refractor","description":"\u003ch1 dir=\"ltr\"\u003e\n\u003cspan\u003eZWO FF131 APO \u003c\/span\u003e\u003cspan\u003eFlat-Field Apochromatic Refractor\u003c\/span\u003e\n\u003c\/h1\u003e\n\u003cp\u003e\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/image1_7d711ce8-338d-421c-916b-e15151240520.jpg?v=1781048454\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/image3_4fb33c62-aaf2-497e-8b9a-9ff74adfdda9.jpg?v=1781048454\" alt=\"\"\u003e\u003c\/p\u003e\n\u003cp dir=\"ltr\"\u003e\u003cspan\u003e*Focus can be achieved within a back focus range of 42–73 mm, measured from the M54–M48 interface shoulder.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch4\u003e\u003cb id=\"docs-internal-guid-5b2ee0c4-7fff-e1d2-2938-e281cb57d6a7\"\u003e\u003cspan\u003eMain Features\u003c\/span\u003e\u003c\/b\u003e\u003c\/h4\u003e\n\u003cp\u003e\u003cb\u003e\u003cspan\u003e\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/image2_9f2348f4-73d4-4e3b-b620-774a59933a57.jpg?v=1781048454\"\u003e\u003c\/span\u003e\u003c\/b\u003e\u003c\/p\u003e\n\u003ch4\u003e\u003cb\u003e\u003cspan\u003e\u003cb id=\"docs-internal-guid-d5a3a2cf-7fff-afdc-c577-4aa99e6d4450\"\u003eFlexible Connectivity for Multiple Configurations\u003c\/b\u003e\u003c\/span\u003e\u003c\/b\u003e\u003c\/h4\u003e\n\u003cp\u003e\u003cb\u003e\u003cspan\u003e\u003cb\u003e\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/image5_dd39a7f4-cafd-4050-8745-d70b432b6b19.jpg?v=1781048455\"\u003e\u003c\/b\u003e\u003c\/span\u003e\u003c\/b\u003e\u003c\/p\u003e\n\u003ch4 dir=\"ltr\"\u003e\u003cspan\u003eUniqueness\u003c\/span\u003e\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli dir=\"ltr\" role=\"presentation\"\u003e\u003cem\u003eFour-Element Optical Design\u003c\/em\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp dir=\"ltr\"\u003e\u003cspan\u003eThe FF131 APO features a four-element, fully air-spaced apochromatic optical design. All four elements work together to deliver a flat imaging field without the need for an additional field flattener.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp dir=\"ltr\"\u003e\u003cspan\u003eOne ED (extra-low dispersion) glass element is incorporated to effectively reduce chromatic aberration, resulting in improved color correction and image clarity.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp dir=\"ltr\"\u003e\u003cspan\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/image4_95aedea1-078c-4fca-a752-f73f428948d7.jpg?v=1781048455\" alt=\"\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli style=\"font-style: italic;\" role=\"presentation\" dir=\"ltr\"\u003e\u003cem\u003e44 mm Image Circle — Full-Frame Support\u003c\/em\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp dir=\"ltr\"\u003e\u003cspan\u003eWith a 44 mm image circle, the FF131 APO fully supports full-frame sensors and a wide range of imaging setups.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp dir=\"ltr\"\u003e\u003cspan\u003eIt delivers sharp star fields with excellent edge-to-edge performance, ensuring consistent image quality across the entire frame.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp dir=\"ltr\"\u003e\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/image7_1fb681bb-f7f8-4716-a192-c408e3355b92.jpg?v=1781048454\"\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli dir=\"ltr\" role=\"presentation\"\u003e\u003cem\u003eNative Flat-Field Design\u003c\/em\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp dir=\"ltr\"\u003e\u003cspan\u003eThe FF131 APO features a native flat-field optical design, eliminating the need for an additional field flattener.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp dir=\"ltr\"\u003e\u003cspan\u003eNo complex back focus calculations or spacing adjustments are required—simply attach your imaging setup and start capturing once focus is achieved.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp dir=\"ltr\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/image6_b493c447-a81f-4859-8aa4-0721e65ec2cb.jpg?v=1781048455\" alt=\"\"\u003e\u003c\/p\u003e\n\u003ch4 dir=\"ltr\"\u003e\u003cspan\u003eConvenient Design\u003c\/span\u003e\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli dir=\"ltr\" role=\"presentation\"\u003e\u003cspan\u003eCoarse \u0026amp; fine focus adjustment\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp dir=\"ltr\"\u003e\u003cspan\u003eEquipped with a rigid 3-inch rack-and-pinion focuser, the FF131 APO offers precise control with a 1:10 coarse \u0026amp; fine focus adjustment mechanism.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp dir=\"ltr\"\u003e\u003cspan\u003eA built-in 360° rotator at the rear allows for smooth and accurate camera angle adjustments.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/image9_ab697dcd-a768-470c-88fe-ea448875041c.jpg?v=1781048455\"\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003e\u003cem\u003eRetractable Dew Shield \u003c\/em\u003e\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp dir=\"ltr\"\u003e\u003cspan\u003eThe FF131 APO features a retractable dew shield, reducing overall length for improved portability.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp dir=\"ltr\"\u003e\u003cspan\u003ePrecision CNC machining and a high-quality painted finish, combined with an internal anti-reflection coating, help minimize stray light and enhance image contrast.\u003c\/span\u003e\u003cb\u003e\u003c\/b\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli style=\"font-style: italic;\" dir=\"ltr\"\u003e\u003cem\u003eQuick-Release Mounting Rings\u003c\/em\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp dir=\"ltr\"\u003e\u003cspan\u003eThe mounting rings are detachable, allowing for quick and easy setup or teardown of the telescope.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp dir=\"ltr\"\u003e\u003cspan\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/image8_d26143d9-0b76-4cb1-808f-d8f44539d94f.jpg?v=1781048455\" alt=\"\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli dir=\"ltr\"\u003e\u003cem\u003ePhotography Extension Tube\u003c\/em\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp dir=\"ltr\"\u003e\u003cspan\u003eThe FF131 APO is designed for seamless integration with modern imaging systems, and includes a standard four-section photographic extension tube with a 2-inch filter thread. Rear adapters in both M48x0.75 and M54x0.75 formats are also included, making it easy to connect a wide range of cameras, filters, and astrophotography accessories for a clean, flexible setup right out of the box.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp dir=\"ltr\"\u003e\u003cspan\u003e\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/image12_1e206542-b17b-40d0-a9f2-0da8d8d330a6.jpg?v=1781048455\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003ch4 dir=\"ltr\"\u003e\u003cspan\u003ePerformance\u003c\/span\u003e\u003c\/h4\u003e\n\u003cp dir=\"ltr\"\u003e\u003cem\u003eOptical Layout\u003c\/em\u003e\u003c\/p\u003e\n\u003cp dir=\"ltr\"\u003e\u003cem\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/image10_36641e33-73bd-4886-9616-8862b405aece.jpg?v=1781048455\" alt=\"\"\u003e\u003c\/em\u003e\u003c\/p\u003e\n\u003cp dir=\"ltr\"\u003e\u003cb id=\"docs-internal-guid-9644c8d6-7fff-b4f1-ddc8-a14d9b974021\"\u003e\u003cspan\u003eStar Field Map\u003c\/span\u003e\u003c\/b\u003e\u003c\/p\u003e\n\u003cp dir=\"ltr\"\u003e\u003cb\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/Bitmap_image.jpg?v=1781062120\" alt=\"\"\u003e\u003c\/b\u003e\u003c\/p\u003e\n\u003cp dir=\"ltr\"\u003e\u003cb id=\"docs-internal-guid-9644c8d6-7fff-b4f1-ddc8-a14d9b974021\"\u003e\u003cspan\u003eProduct \u003c\/span\u003e\u003c\/b\u003e\u003cb\u003eDiagram\u003c\/b\u003e\u003c\/p\u003e\n\u003cp dir=\"ltr\"\u003e\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/image13_4a58f3d4-5768-4349-afd1-b0151e6ac536.jpg?v=1781048454\"\u003e\u003c\/p\u003e\n\u003cp dir=\"ltr\"\u003e\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/image14_9d0159e1-6c15-4a79-bb59-8beff9908898.jpg?v=1781048455\"\u003e\u003c\/p\u003e\n\u003cp dir=\"ltr\"\u003e\u003cb id=\"docs-internal-guid-1ed699a1-7fff-86bd-5b9f-2ec8ee424333\"\u003e\u003cspan\u003eSpecifications\u003c\/span\u003e\u003c\/b\u003e\u003c\/p\u003e\n\u003cp dir=\"ltr\"\u003e\u003cb\u003e\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/image15_65c0e969-b150-45c0-8a66-98f021a390f1.jpg?v=1781048455\"\u003e\u003c\/b\u003e\u003c\/p\u003e\n\u003cp dir=\"ltr\"\u003e\u003cb\u003e\u003cb id=\"docs-internal-guid-43e91f37-7fff-0753-86cf-840c524d2254\"\u003e\u003cspan\u003eWhat's in the Box?\u003c\/span\u003e\u003c\/b\u003e\u003c\/b\u003e\u003c\/p\u003e\n\u003cp dir=\"ltr\"\u003e\u003cb\u003e\u003cb\u003e\u003cspan\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/image16_63eac4e6-8a33-419c-93c1-e619ae262dd7.jpg?v=1781048455\" alt=\"\"\u003e\u003c\/span\u003e\u003c\/b\u003e\u003c\/b\u003e\u003c\/p\u003e","brand":"ZWO","offers":[{"title":"Default Title","offer_id":48334294483203,"sku":"ZWO FF131-APO","price":1999.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/FF130APO1_1296x_583a2fe2-82aa-454f-bdb1-cfc28ec7e43b.webp?v=1781122209"},{"product_id":"askar-50p-skyguider-pro-bundle","title":"Askar 50P-SkyGuider Pro Bundle","description":"\u003ch2\u003e\n\u003cspan\u003eUltra-compact, lightweight kit—\u003c\/span\u003e\u003cspan\u003egreat for beginners and experienced astrophotographers, too!\u003c\/span\u003e\n\u003c\/h2\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cstrong\u003eThis package combines Askar's small, fast wide-angle refractor, the 50P, with a classic iOptron Skyguider Pro mount... \u003c\/strong\u003e Because of this system's low magnification, the lightweight SkyGuider Pro provides all the support and tracking you need, so \u003cstrong\u003ethe combination is both \u003c\/strong\u003e\u003c\/span\u003e\u003cstrong\u003eeasy to carry and simple to learn.\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eAt the same time, the \u003cstrong\u003e50P's wide field—more than three degrees with the popular ASI585 camera, \u003c\/strong\u003eor \u003cstrong\u003ea whopping \u003cem\u003eseven degrees \u003c\/em\u003ewith an APS-C camera—\u003c\/strong\u003eoffers \u003cstrong\u003ethe opportunity for advanced astrophotographers to shoot both deep and wide\u003c\/strong\u003e.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eThe SkyGuider Pro\u003c\/strong\u003e is valued for its \u003cem\u003eease of use\u003c\/em\u003e with small telescopes and relatively light weight. \u003cstrong\u003eBeginners benefit because this mount is quick to master\u003c\/strong\u003e (and easy to take outside for practice!), while \u003cstrong\u003efor experienced shooters, the simplicity of the setup means more time on target building up your integration\u003c\/strong\u003e, instead of fiddling around with your astrophotography gear. \u003cem\u003e \u003c\/em\u003eA proficient astrophotographer should be able to to shoot either camera above for at least 30 seconds per \"sub,\" and likely more, \u003cem\u003ewithout guiding.\u003c\/em\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan style=\"color: rgb(0, 170, 255);\"\u003eThis kit provides telescope, mount and tripod—\u003cem\u003eyou'll bring your own camera\u003c\/em\u003e. \u003c\/span\u003e (For owners of traditional cameras—DSLRs and mirrorless—you'll also need a\u003cem\u003e 48mm t-ring\u003c\/em\u003e. Give us a call if you have questions about this, and we'll help you get the right thing.)\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch1\u003e\u003cspan\u003eThe Askar 50P: A portable, versatile 50mm quadruplet APO astrograph\u003c\/span\u003e\u003c\/h1\u003e\n\u003cp\u003e\u003cspan\u003eAskar's petite new 50P Petzval optic provides sharp images with APS-C and smaller cameras, providing wide-angle views and fast, f\/3.8 imaging. With its 190mm focal length, you'll get \u003cstrong\u003ea roughly 7° field across the long side of APS-C cameras, and a still-wide 3.4° with the popular ASI585 cameras...  \u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cstrong\u003eThis is a great choice for beginners:\u003c\/strong\u003e The 50P's light weight makes it ideal for use on small tracking mounts (like the SkyGuider Pro!) and its relatively low magnification is \u003c\/span\u003eforgiving of minor errors in tracking and polar alignment. \u003cspan\u003eBecause of its Petzval design, there's no need for precise backfocus, either—anywhere from 50-65mm will work well, \u003cem\u003eeasy-peasy\u003c\/em\u003e. \u003c\/span\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/RhoOph_54b82429-01e2-4c64-a92a-04c1d852a08f.webp?v=1778803203\" alt=\"\"\u003e\u003cmeta charset=\"UTF-8\"\u003e\u003cstrong\u003e ρ Ophiuchi cloud complex  |  Askar 50P+ZWO ASI2600MC\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: left;\"\u003e \u003c\/p\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/Monoceros_7392dbd7-9d63-4469-aba3-b5ef2d063629.webp?v=1778803547\"\u003e\u003cmeta charset=\"UTF-8\"\u003e\u003cstrong\u003eMonoceros  |  Askar 50P+ZWO ASI2600MC\u003c\/strong\u003e\u003c\/p\u003e\n\u003ch4 style=\"text-align: left;\"\u003eSpecifications\u003c\/h4\u003e\n\u003ctable class=\"ck-table-resized\" align=\"center\" cellspacing=\"0\" border=\"0\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp\u003e\u003cstrong\u003eAperture size\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\n\u003cp\u003e\u003cstrong\u003e50mm\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp\u003e\u003cstrong\u003eFocal length\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\n\u003cp\u003e\u003cstrong\u003e190mm \u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp\u003e\u003cstrong\u003eFocal ratio\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\n\u003cp\u003e\u003cstrong\u003ef\/3.8\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp\u003e\u003cstrong\u003eObjective lens\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\n\u003cp\u003e\u003cstrong\u003eQuadruplet petzval APO（including one piece of SD glass）\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp\u003e\u003cstrong\u003eTotal length\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\n\u003cp\u003e\u003cstrong\u003e147mm(when the dew shield is contracted)\u003c\/strong\u003e           \u003cbr\u003e\u003cstrong\u003e182mm(when the dew shield is stretched)\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp\u003e\u003cstrong\u003eFormat specifications\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\n\u003cp\u003e\u003cstrong\u003eAPS-C format（optimized for 1-inch sensors）\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp\u003e\u003cstrong\u003eGross weight（including tube ring and dovetail plate）\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\n\u003cp\u003e\u003cstrong\u003e1.4kg\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp\u003e\u003cstrong\u003eRear-end thread type\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\n\u003cp\u003e\u003cstrong\u003eM48 adapter (with M48×0.75 filter thread)\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp\u003e\u003cstrong\u003eRear-end connection distance\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\n\u003cp\u003e\u003cstrong\u003eSupport 50-65mm range (Recommended connection length is 55mm)\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp\u003e\u003cstrong\u003eStandard package items\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\n\u003cp\u003e\u003cstrong\u003eA 50P OTA，a manual\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/ProductSizeDiagram_4b592863-0c9e-40b2-af5a-7881ceb98918.webp?v=1778804032\"\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch1\u003eSkyGuider Pro: Simple and Effective.\u003c\/h1\u003e\n\u003cp\u003e\u003cspan style=\"color: #ff2a00;\"\u003e\u003cem\u003e\u003cstrong\u003e\u003c\/strong\u003e\u003c\/em\u003e\u003c\/span\u003eIn our opinion, the best camera tracker to get started in astrophotography! \u003cstrong\u003e\u003cem\u003eThose of us who do astrophotography here at Mile High own these ourselves—\u003c\/em\u003eeven \u003c\/strong\u003e\u003cb\u003ethough we have bigger mounts\u003c\/b\u003e. \u003c\/p\u003e\n\u003ch3\u003eFeatures\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003ePayload 11 lbs (5kg) (balanced with DEC mounting bracket, exclude CW)\u003c\/li\u003e\n\u003cli\u003eSilent tracking for smooth camera motion, perfect for long-term exposures\u003c\/li\u003e\n\u003cli\u003eDetachable alt-az base with fine latitude and azimuth adjusters for easy polar alignment\u003c\/li\u003e\n\u003cli\u003eIncludes iOptron AccuAlign dark-field illuminated polar scope \u003c\/li\u003e\n\u003cli\u003e4 tracking speed (1X, 1\/2X, solar and lunar). 1X celestial tracking for imaging the sky and stars; 1\/2X tracking speed for imaging both the starry night and the landscapes at the same time\u003c\/li\u003e\n\u003cli\u003eOperation in both northern and southern hemispheres\u003c\/li\u003e\n\u003cli\u003eBuilt-in rechargeable battery for up to 20 hours of operation (20°C)\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eBuilt-in ST-4 autoguiding port\u003c\/li\u003e\n\u003cli\u003eMicro USB port for power, charging and firmware upgrade\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eVixen dovetail saddle for scope mounting\u003c\/li\u003e\n\u003cli\u003eAttaches to a camera tripod with 3\/8” threads\u003cbr\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch5\u003eSpecifications\u003c\/h5\u003e\n\u003ctable border=\"1\" cellspacing=\"0\" cellpadding=\"0\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eMount\u003c\/td\u003e\n\u003ctd\u003eCompact single axis tracking EQ\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePayload (Max.)\u003c\/td\u003e\n\u003ctd\u003e11 lbs (5kg), balanced\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMount weight\u003c\/td\u003e\n\u003ctd\u003e2.2 lbs (1kg) with battery\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMount weight with base\u003c\/td\u003e\n\u003ctd\u003e3.2 lbs (1.45kg) with battery\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBody material\u003c\/td\u003e\n\u003ctd\u003eAll metal\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRA shaft\u003c\/td\u003e\n\u003ctd\u003eΦ35mm, steel\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWorm wheel\u003c\/td\u003e\n\u003ctd\u003eΦ88mm, 144 teeth aluminum alloy\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eR.A. worm\u003c\/td\u003e\n\u003ctd\u003eΦ15.2mm, brass\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBearing\u003c\/td\u003e\n\u003ctd\u003e4 pieces\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMotor drive\u003c\/td\u003e\n\u003ctd\u003eDC servo motor with optical encoder\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTracking\u003c\/td\u003e\n\u003ctd\u003eR.A. automatic\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTracking speed\u003c\/td\u003e\n\u003ctd\u003eSolar, Lunar, Cel, 1\/2 Cel, and N\/S\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFast slew speed\u003c\/td\u003e\n\u003ctd\u003e144X, forward and reverse\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eGuiding port\u003c\/td\u003e\n\u003ctd\u003eST-4 compatible\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCamera trigger\u003c\/td\u003e\n\u003ctd\u003eYes\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower Requirement\u003c\/td\u003e\n\u003ctd\u003eInternal rechargeable battery\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBattery type\u003c\/td\u003e\n\u003ctd\u003eLi-Poly, 3.7V, 2000mAh\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDuration of operation\u003c\/td\u003e\n\u003ctd\u003eUp to 20 hours at 20ºC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower charge port\u003c\/td\u003e\n\u003ctd\u003eMicro USB (5V), 80% charge in 5 hours\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCamera mounting block\u003c\/td\u003e\n\u003ctd\u003eΦ62mm, 3\/8\" post thread\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBody base connection\u003c\/td\u003e\n\u003ctd\u003eVixen dovetail, 3\/8” socket\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAlt-Azi adjustable base\u003c\/td\u003e\n\u003ctd\u003eVixen style saddle, 3\/8” socket\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAlt-Azi adjustable base diameter\u003c\/td\u003e\n\u003ctd\u003eΦ80 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eLatitude adjustment range\u003c\/td\u003e\n\u003ctd\u003e-30º ~ 65º (with alt-azi base)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAzimuth adjustment range\u003c\/td\u003e\n\u003ctd\u003e±5º\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBody dimension\u003c\/td\u003e\n\u003ctd\u003e133x115x95 mm (w\/o alt-azi base)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCounterweight shaft\u003c\/td\u003e\n\u003ctd\u003eΦ20x200 mm w\/ 3\/8”-16 threads\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCounterweight\u003c\/td\u003e\n\u003ctd\u003e1.35kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFirmware upgrade\u003c\/td\u003e\n\u003ctd\u003eYes (via USB port)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperation Temperature\u003c\/td\u003e\n\u003ctd\u003e-10ºC ~40ºC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWarranty\u003c\/td\u003e\n\u003ctd\u003eOne year limited (90 day on battery)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch3\u003e\n\u003cspan\u003e\u003c\/span\u003e\u003cbr\u003e\n\u003c\/h3\u003e\n\u003ch3\u003e\u003cspan\u003eIn The Box (SkyGuider Pro)\u003c\/span\u003e\u003c\/h3\u003e\n\u003cdiv style=\"text-align: left;\"\u003e\n\u003cspan\u003e\u003c\/span\u003e\n\u003cul\u003e\n\u003cli\u003eSkyGuider\u003csup\u003eTM\u003c\/sup\u003e Pro camera mount with optical polar scope\u003c\/li\u003e\n\u003cli\u003eAlt-az base\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eMicro USB charging cable\u003c\/li\u003e\n\u003cli\u003ePadded carry bag\u003c\/li\u003e\n\u003cli\u003eDEC mounting bracket w\/ camera mounting disk and vizen saddle plate.\u003c\/li\u003e\n\u003cli\u003e1.35kg counterweight\u003c\/li\u003e\n\u003cli\u003eCW shaft\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e","brand":"Askar","offers":[{"title":"Default Title","offer_id":48373507293443,"sku":null,"price":725.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/50p_SkyGuider_Bundle_zs_a.jpg?v=1781379101"}],"url":"https:\/\/milehighastro.com\/collections\/astrographs.oembed?page=3","provider":"Mile High Astronomy","version":"1.0","type":"link"}