{"title":"Field Flatteners \u0026 Reducers","description":null,"products":[{"product_id":"celestron-reducer-corrector-f-6-3","title":"Reducer\/Corrector f\/6.3","description":"\u003cul\u003e\n\u003cli\u003eThis combination focal reducer and field corrector lens accessory works with all Celestron 5\", 6\", 8\", 9 1\/4\", 11\" and 14\" Schmidt-Cassegrain telescopes\u003c\/li\u003e\n\u003cli\u003eThis clever accessory makes it possible to have a dual focal ratio instrument, without sacrificing image quality\u003c\/li\u003e\n\u003cli\u003eThe Reducer\/Corrector is f\/6.3 for C5, C6, C8, C9¼ and C11 telescopes and f\/7 for the C14 telescope\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eReducer\/Corrector f\/6.3\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThis combination focal reducer and field corrector lens accessory works with all Celestron 5\", 6\", 8\", 9 1\/4\", 11\" and 14\" Schmidt-Cassegrain telescopes. This clever accessory makes it possible to have a dual focal ratio instrument, without sacrificing image quality. The Reducer\/Corrector is f\/6.3 for C5, C6, C8, C9¼ and C11 telescopes and f\/7 for the C14 telescope.\u003c\/p\u003e\n\u003cp\u003eIf offers wide fields of view with any Schmidt-Cassegrain telescope. Used for astrophotography, it reduces exposure time by a factor of 3.\u003c\/p\u003e\n\u003cp\u003eCelestron doesn’t offer a f\/6.3 Schmidt-Cassegrain telescope, because the design is impractical, with a large central obstruction, and resulting loss in contrast. This, added to the inability to utilize longer focal ratios for certain objects, led Celestron to design the four-element, fully multicoated f\/6.3 Reducer\/Corrector. Results are amazing both visually and photographically.\u003c\/p\u003e\n\u003cp\u003e\u003cspan style=\"color: #ff0000;\"\u003e\u003cstrong\u003eThe #94175 Reducer\/Corrector Lens is not compatible with Celestron EdgeHD optical systems.\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e","brand":"Celestron","offers":[{"title":"Default Title","offer_id":3737416335400,"sku":"94175","price":199.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/products\/94175_reducer_corrector_01_570x380_2x_712063c0-ec6f-4570-ba54-3f276e1f80c0.jpg?v=1518924609"},{"product_id":"celestron-reducer-lens-7x-edgehd-800","title":"Reducer Lens .7X - EdgeHD 800","description":"\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eThe EdgeHD .7x Focal Reducer Lens makes your EdgeHD 800 one full f-stop faster than f\/10, doubling the equivalent exposure at f\/10\u003c\/li\u003e\n\u003cli\u003e4-element lens design\u003c\/li\u003e\n\u003cli\u003eMaintains similar flat-field performance as native EdgeHD optical design\u003c\/li\u003e\n\u003cli\u003eIncreases field of view by 43% (double by area) to better capture wide field images\u003c\/li\u003e\n\u003cli\u003eOptimized for APS-C sized sensors, including most DSLR cameras and Nightscape CCD cameras\u003c\/li\u003e\n\u003cli\u003eProvides generous 105 mm back focus to accomodate additional accessories and a wide variety of cameras\u003c\/li\u003e\n\u003cli\u003eCompatible with EdgeHD 800 T-Adapter\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eCelestron’s new EdgeHD reducers features a custom 4 element optical design engineered to maintain the flat-field performance of our award winning EdgeHD optical system. Unlike generic reducers, our premium reducers provide substantial back focus to accommodate an assortment of imaging accessories.\u003c\/p\u003e\n\u003cp\u003eEdgeHD reducers offer high index optical elements, including extra low dispersion, exotic Lanthanum elements, which provide high contrast viewing while minimizing chromatic aberration. All air to glass lens surfaces feature multiple layers of coating for maximum light transmission and color correction and contain blacken edges to minimize internal reflection and maximize image contrast.\u003c\/p\u003e\n\u003cp\u003eIncorporating computer assisted CNC machined aluminum housing, for precise spacing and alignment of optical elements, and threaded metal covers on the lens assembly to protect your investment from dust and scratches, our reducers offer you an outstanding mechanical design.\u003c\/p\u003e\n\u003cp\u003eWith the Fastar option on all EdgeHD optical systems, coupled with the .7x reducer, your telescope becomes the most complete imaging system available in its price range today.\u003c\/p\u003e\n\u003ch3\u003ePerformance\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eDesign:\u003c\/strong\u003e 4-element optical layout designed specifically for the EdgeHD 8\" to maintain the flat-field performance of the EdgeHD optical design\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e105 mm of back focus:\u003c\/strong\u003e Provides generous back focus to accommodate additional accessories and a wide variety of cameras. Also allows use of existing T-Adapters for EdgeHD 800 and other Celestron imaging accessories\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOne full F-Stop faster than f\/10:\u003c\/strong\u003e Reduces the exposure time by one-half to capture the same brightness of object\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIncrease field of view by 43%: \u003c\/strong\u003eBetter for capturing wide field images of larger galaxies and nebulae\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eGlass\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eLanthanum Glass Elements: \u003c\/strong\u003eEdgeHD reducer uses \"rare earth\" Lanthanum glass elements for clear, high contrast viewing while minimizing chromatic aberration\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFully multi-coated lens elements:\u003c\/strong\u003e All air-to-glass surfaces have multiple layers of coating for maximum light transmission and color correction\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBlacken edges:\u003c\/strong\u003e All lens elements have blacken edges to minimize internal reflection and maximize contrast\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 class=\"p1\"\u003eLarge Illuminated Field\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eOptimized for APS-C sized sensors: \u003c\/strong\u003eIncluding most DSLR cameras and Nightscape CCD cameras\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eMechanical Design\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMachined aluminum housing: \u003c\/strong\u003eComputer assisted CNC machined aluminum housing for precise spacing and alignment of the optical elements.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThreaded metal covers for both ends of the lens assembly: \u003c\/strong\u003eTo protect your investment from unwanted dust and scratches.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eVersatility\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cstrong\u003eProvides and intermediate focal length between EdgeHD's native f\/10 (or f\/11) and the optional Hyperstar accessory at f\/2, making the EdgeHD the most complete imaging system in its price range\u003cbr\u003e\u003c\/strong\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003e\u003cstrong\u003eSpecifications\u003c\/strong\u003e\u003c\/h2\u003e\n\u003ctable id=\"product-specs-list\" class=\"table-open\"\u003e\n\u003ctbody id=\"spec-block-1\"\u003e\n\u003ctr\u003e\n\u003ctd\u003eOptical Coatings\u003c\/td\u003e\n\u003ctd\u003eFully multi-coated\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWeight (lbs)\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e3.25 lbs (1.47 kg)\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCompression Factor\u003c\/td\u003e\n\u003ctd\u003e.7 x\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eLens Elements\u003c\/td\u003e\n\u003ctd\u003e4-Element\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOptimal Back Focus (mm)\u003c\/td\u003e\n\u003ctd\u003e105 mm (4.13 in)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e","brand":"Celestron","offers":[{"title":"Default Title","offer_id":3737416368168,"sku":"94242","price":419.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/products\/94242_reducer_lens_edgehd_800_03_570x380_2x_4b118be0-ed88-41ef-b6fb-ed3301d87c91.jpg?v=1520620249"},{"product_id":"celestron-reducer-lens-7x-edgehd-1400","title":"Reducer Lens .7x - EdgeHD 1400","description":"\u003cul\u003e\n\u003cli\u003eThe EdgeHD .7x Focal Reducer Lens makes your EdgeHD 1400 one full F-Stop faster than f\/11, reducing your exposure time by half to capture the same brightness of object\u003c\/li\u003e\n\u003cli\u003e5-element lens design\u003c\/li\u003e\n\u003cli\u003eMaintains similar flat-field performance as native EdgeHD optical design\u003c\/li\u003e\n\u003cli\u003eIncreases field of view by 43% to better capture wide field images\u003c\/li\u003e\n\u003cli\u003eThreads directly onto the 3.25\" threads of the EdgeHD which reduces mechanical vignetting and allows for use with larger (full frame) sensors and Off-Axis Guiders\u003c\/li\u003e\n\u003cli\u003eMaintains the identical back focus when used at f\/11 and provides generous back focus to accommodate additional accessories and wide variety of cameras\u003c\/li\u003e\n\u003cli\u003eAllows use of existing EdgeHD T-Adapters with or without the Reducer Lens\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eCelestron’s new EdgeHD reducers feature a custom 5 element optical design engineered to maintain the flat-field performance of our award winning EdgeHD optical system. Unlike generic reducers, our premium reducers provide substantial back focus to accommodate an assortment of imaging accessories.\u003c\/p\u003e\n\u003cp\u003eEdgeHD reducers offer high index optical elements, including extra low dispersion, exotic Lanthanum elements, which provide high contrast viewing while minimizing chromatic aberration. All air to glass lens surfaces feature multiple layers of coating for maximum light transmission and color correction and contain blacken edges to minimize internal reflection and maximize image contrast. Large diameter lens elements, up to 60 mm clear aperture, ensure that the optimized image circle remains at a generous 42 mm for use with large CCD sensors.\u003c\/p\u003e\n\u003cp\u003eIncorporating computer assisted CNC machined aluminum housing, for precise spacing and alignment of optical elements, and threaded metal covers on the lens assembly to protect your investment from dust and scratches, our reducers offer you an outstanding mechanical design.\u003c\/p\u003e\n\u003cp\u003eWith the fastar option on all EdgeHD optical systems, coupled with the .7x reducer, your telescope becomes the most complete imaging system available in its price range today.\u003c\/p\u003e\n\u003ch3\u003ePerformance\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eDesign:\u003c\/strong\u003e 5-element optical layout designed specifically for the EdgeHD 14\" to maintain the flat-field performance of the EdgeHD optical design\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaintains the same back focus as when used at f\/11:\u003c\/strong\u003e Unlike generic reducers the EdgeHD .7x provides generous back focus to accommodate additional accessories and a wide variety of cameras. Also allows use of existing EdgeHD T-Adapters and other Celestron imaging accessories\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOne full F-Stop faster than f\/11:\u003c\/strong\u003e Reduces the exposure time by half to capture the same brightness of object\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIncrease field of view by 43%: \u003c\/strong\u003eBetter for capturing wide field images of larger galaxies and nebulae\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eGlass\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eLanthanum Glass Elements: \u003c\/strong\u003eEdgeHD reducer uses \"rare earth\" Lanthanum glass elements for clear, high contrast viewing while minimizing chromatic aberration\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFully multi-coated lens elements:\u003c\/strong\u003e All air-to-glass surfaces have multiple layers of coating for maximum light transmission and color correction\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBlacken edges:\u003c\/strong\u003e All lens elements have blacken edges to minimize internal reflection and maximize contrast\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eFull Frame Design\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eThreads directly onto the 3.25\" threads of the EdgeHD optical tube: \u003c\/strong\u003eReduces mechanical vignetting and allows for use with larger (full frame) sensors and Off-Axis Guiders\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eClear aperture: \u003c\/strong\u003e60 mm clear aperture lens optimized for a 42 mm image circle for use with large CCD sensors.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eMechanical Design\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMachined aluminum housing: \u003c\/strong\u003eComputer assisted CNC machined aluminum housing for precise spacing and alignment of the optical elements.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThreaded metal covers for both ends of the lens assembly: \u003c\/strong\u003eTo protect your investment from unwanted dust and scratches.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eVersatility\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eFastar compatibility and f\/2 imaging with optional accessory: \u003c\/strong\u003ethe EdgeHD is the most complete imaging system in its price range.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eSpecifications\u003c\/h2\u003e\n\u003ctable class=\"table-open\" id=\"product-specs-list\"\u003e\n\u003ctbody id=\"spec-block-1\"\u003e\n\u003ctr\u003e\n\u003ctd\u003eOptical Coatings\u003c\/td\u003e\n\u003ctd\u003eFully multi-coated\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWeight (lbs)\u003c\/td\u003e\n\u003ctd\u003e3.25 lbs (1.47 kg)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCompression Factor\u003c\/td\u003e\n\u003ctd\u003e.7 x\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eLens Elements\u003c\/td\u003e\n\u003ctd\u003e5-Element\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOptimal Back Focus (mm)\u003c\/td\u003e\n\u003ctd\u003e146 mm (5.75 in)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e","brand":"Celestron","offers":[{"title":"Default Title","offer_id":3737416400936,"sku":"94240","price":849.0,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/products\/94240_reducer_lens_1400_04_570x380_2x_357cf41b-f94e-48e2-85cf-160904cbcb94.jpg?v=1520620092"},{"product_id":"celestron-reducer-lens-7x-edgehd-1100","title":"Reducer Lens .7x - EdgeHD 1100","description":"\u003cul\u003e\n\u003cli\u003eThe EdgeHD .7x Focal Reducer Lens makes your EdgeHD 1100 one full F-Stop faster than f\/10, reducing your exposure time by half to capture the same brightness of object\u003c\/li\u003e\n\u003cli\u003e5-element lens design\u003c\/li\u003e\n\u003cli\u003eMaintains similar flat-field performance as native EdgeHD optical design\u003c\/li\u003e\n\u003cli\u003eIncreases field of view by 43% to better capture wide field images\u003c\/li\u003e\n\u003cli\u003eThreads directly onto the 3.25\" threads of the EdgeHD which reduces mechanical vignetting and allows for use with larger (full frame) sensors and Off-Axis Guiders\u003c\/li\u003e\n\u003cli\u003eMaintains the identical back focus when used at f\/10 and provides generous back focus to accommodate additional accessories and wide variety of cameras\u003c\/li\u003e\n\u003cli\u003eAllows use of existing EdgeHD T-Adapters with or without the Reducer Lens\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eCelestron’s new EdgeHD reducers feature a custom 5 element optical design engineered to maintain the flat-field performance of our award winning EdgeHD optical system. Unlike generic reducers, our premium reducers provide substantial back focus to accommodate an assortment of imaging accessories.\u003c\/p\u003e\n\u003cp\u003eEdgeHD reducers offer high index optical elements, including extra low dispersion, exotic Lanthanum elements, which provide high contrast viewing while minimizing chromatic aberration. All air to glass lens surfaces feature multiple layers of coating for maximum light transmission and color correction and contain blacken edges to minimize internal reflection and maximize image contrast. Large diameter lens elements, up to 60 mm clear aperture, ensure that the optimized image circle remains at a generous 42 mm for use with large CCD sensors.\u003c\/p\u003e\n\u003cp\u003eIncorporating computer assisted CNC machined aluminum housing, for precise spacing and alignment of optical elements, and threaded metal covers on the lens assembly to protect your investment from dust and scratches, our reducers offer you an outstanding mechanical design.\u003c\/p\u003e\n\u003cp\u003eWith the fastar option on all EdgeHD optical systems, coupled with the .7x reducer, your telescope becomes the most complete imaging system available in its price range today.\u003c\/p\u003e\n\u003ch3\u003ePerformance\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eDesign:\u003c\/strong\u003e 5-element optical layout designed specifically for the EdgeHD11\" to maintain the flat-field performance of the Edge HD optical design\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaintains the same back focus as when used at f\/10:\u003c\/strong\u003e Unlike generic reducers the EdgeHD .7x provides generous back focus to accommodate additional accessories and a wide variety of cameras. Also allows use of existing EdgeHD T-Adapters and other Celestron imaging accessories\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOne full F-Stop faster than f\/10:\u003c\/strong\u003e Reduces the exposure time by one-half to capture the same brightness of object\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIncrease field of view by 43%: \u003c\/strong\u003eBetter for capturing wide field images of larger galaxies and nebulae\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eGlass\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eLanthanum Glass Elements: \u003c\/strong\u003eEdgeHD reducer uses \"rare earth\" Lanthanum glass elements for clear, high contrast viewing while minimizing chromatic aberration\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFully multi-coated lens elements:\u003c\/strong\u003e All air-to-glass surfaces have multiple layers of coating for maximum light transmission and color correction\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBlacken edges:\u003c\/strong\u003e All lens elements have blacken edges to minimize internal reflection and maximize contrast\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eFull Frame Design\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eThreads directly onto the 3.25\" threads of the EdgeHD optical tube: \u003c\/strong\u003eReduces mechanical vignetting and allows for use with larger (full frame) sensors and Off-Axis Guiders\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eClear aperture: \u003c\/strong\u003e60 mm clear aperture lens optimized for a 42 mm image circle for use with large CCD sensors.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eMechanical Design\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMachined aluminum housing: \u003c\/strong\u003eComputer assisted CNC machined aluminum housing for precise spacing and alignment of the optical elements.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThreaded metal covers for both ends of the lens assembly: \u003c\/strong\u003eTo protect your investment from unwanted dust and scratches.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eVersatility\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eFastar compatibility and f\/2 imaging with optional accessory: \u003c\/strong\u003ethe EdgeHD is the most complete imaging system in its price range.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eSpecifications\u003c\/h2\u003e\n\u003ctable class=\"table-open\" id=\"product-specs-list\"\u003e\n\u003ctbody id=\"spec-block-1\"\u003e\n\u003ctr\u003e\n\u003ctd\u003eOptical Coatings\u003c\/td\u003e\n\u003ctd\u003eFully multi-coated\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWeight (lbs)\u003c\/td\u003e\n\u003ctd\u003e3.25 lbs (1.47 kg)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCompression Factor\u003c\/td\u003e\n\u003ctd\u003e.7 x\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eLens Elements\u003c\/td\u003e\n\u003ctd\u003e5-Element\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOptimal Back Focus (mm)\u003c\/td\u003e\n\u003ctd\u003e146 mm (5.75 in)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e","brand":"Celestron","offers":[{"title":"Default Title","offer_id":3737416433704,"sku":"94241","price":849.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/products\/94241_reducer_lens_1100_01_570x380_2x_0d60dcfd-819a-4aa2-90d5-892a39892cbd.jpg?v=1520619937"},{"product_id":"celestron-reducer-lens-7x-edgehd-925","title":"Reducer Lens .7X - EdgeHD 925","description":"\u003cul\u003e\n\u003cli\u003eThe EdgeHD .7x Focal Reducer Lens makes your EdgeHD 925 one full f-stop faster than f\/10, doubling the equivalent exposure at f\/10\u003c\/li\u003e\n\u003cli\u003e4-element lens design\u003c\/li\u003e\n\u003cli\u003eMaintains similar flat-field performance as native EdgeHD optical design\u003c\/li\u003e\n\u003cli\u003eIncreases field of view by 43% (double by area) to better capture wide field images\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOptimized for APS-C sized sensors\u003c\/strong\u003e, including most DSLR cameras and Nightscape CCD cameras. \u003cstrong\u003eNote optimal for full frame cameras.\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003eProvides generous 105 mm back focus to accomodate additional accessories and a wide variety of cameras\u003c\/li\u003e\n\u003cli\u003eCompatible with \u003ca href=\"https:\/\/milehighastro.com\/products\/celestron-t-adapter-edgehd-9-11-14\" target=\"_blank\"\u003eEdgeHD 925 T-Adapter\u003c\/a\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eCelestron’s new EdgeHD reducers features a custom 4 element optical design engineered to maintain the flat-field performance of our award winning EdgeHD optical system. Unlike generic reducers, our premium reducers provide substantial back focus to accommodate an assortment of imaging accessories.\u003c\/p\u003e\n\u003cp\u003eEdgeHD reducers offer high index optical elements, including extra low dispersion, exotic Lanthanum elements, which provide high contrast viewing while minimizing chromatic aberration. All air to glass lens surfaces feature multiple layers of coating for maximum light transmission and color correction and contain blacken edges to minimize internal reflection and maximize image contrast.\u003c\/p\u003e\n\u003cp\u003eIncorporating computer assisted CNC machined aluminum housing, for precise spacing and alignment of optical elements, and threaded metal covers on the lens assembly to protect your investment from dust and scratches, our reducers offer you an outstanding mechanical design.\u003c\/p\u003e\n\u003cp\u003eWith the Fastar option on all EdgeHD optical systems, coupled with the .7x reducer, your telescope becomes the most complete imaging system available in its price range today.\u003c\/p\u003e\n\u003ch3\u003ePerformance\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eDesign:\u003c\/strong\u003e 4-element optical layout designed specifically for the EdgeHD 8\" to maintain the flat-field performance of the EdgeHD optical design\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e105 mm of back focus:\u003c\/strong\u003e Provides generous back focus to accommodate additional accessories and a wide variety of cameras. Also allows use of existing T-Adapters for EdgeHD 800 and other Celestron imaging accessories\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOne full F-Stop faster than f\/10:\u003c\/strong\u003e Reduces the exposure time by one-half to capture the same brightness of object\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIncrease field of view by 43%: \u003c\/strong\u003eBetter for capturing wide field images of larger galaxies and nebulae\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eGlass\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eLanthanum Glass Elements: \u003c\/strong\u003eEdgeHD reducer uses \"rare earth\" Lanthanum glass elements for clear, high contrast viewing while minimizing chromatic aberration\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFully multi-coated lens elements:\u003c\/strong\u003e All air-to-glass surfaces have multiple layers of coating for maximum light transmission and color correction\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBlacken edges:\u003c\/strong\u003e All lens elements have blacken edges to minimize internal reflection and maximize contrast\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 class=\"p1\"\u003eLarge Illuminated Field\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eOptimized for APS-C sized sensors: \u003c\/strong\u003eIncluding most DSLR cameras and Nightscape CCD cameras\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eMechanical Design\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMachined aluminum housing: \u003c\/strong\u003eComputer assisted CNC machined aluminum housing for precise spacing and alignment of the optical elements.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThreaded metal covers for both ends of the lens assembly: \u003c\/strong\u003eTo protect your investment from unwanted dust and scratches.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eVersatility\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eProvides and intermediate focal length between EdgeHD's native f\/10 (or f\/11) and the optional Hyperstar accessory at f\/2, making the EdgeHD the most complete imaging system in its price range\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003e\u003cstrong\u003eSpecifications\u003c\/strong\u003e\u003c\/h2\u003e\n\u003ctable class=\"table-open\" id=\"product-specs-list\"\u003e\n\u003ctbody id=\"spec-block-1\"\u003e\n\u003ctr\u003e\n\u003ctd\u003eOptical Coatings\u003c\/td\u003e\n\u003ctd\u003eFully multi-coated\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWeight (lbs)\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e3.25 lbs (1.47 kg)\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCompression Factor\u003c\/td\u003e\n\u003ctd\u003e.7 x\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eLens Elements\u003c\/td\u003e\n\u003ctd\u003e4-Element\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOptimal Back Focus (mm)\u003c\/td\u003e\n\u003ctd\u003e105 mm (4.13 in)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e","brand":"Celestron","offers":[{"title":"Default Title","offer_id":8079999008861,"sku":"94245","price":439.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/products\/94242_reducer_lens_edgehd_800_03_570x380_2x_2b548474-1023-44bf-9156-300ad0e6163e.jpg?v=1522554405"},{"product_id":"explore_scientific_3in_flattner_and_7x_focal_reducer","title":"3\" Flattener and .7X Focal Reducer","description":"\u003cp\u003e \u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eFor use with Explore Scientific ED127-152-165 Air-Spaced Triplets\u003c\/li\u003e\n\u003cli\u003e3.0-inch O.D. with Adapters for Explore Scientific Focusers\u003c\/li\u003e\n\u003cli\u003e0.7x Reducer and Field Flattener\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eNOTE:\u003c\/strong\u003e Separate adapter required for the ES 2.5\" HEX focuser.\u003c\/p\u003e\n\u003cp\u003eExplore Scientific's 3-inch Field Flattener\/0.7x Focal Reducer is a multi-faceted accessory designed to enhance your astrophotography experiences. As a field flattener, this piece addresses the edge-of-field aberrations caused by curved focal planes to ensure your night at the eyepiece will result in crisp, true images.\u003c\/p\u003e\n\u003cp\u003eAs a focal reducer, this device will reduce your f-ratio by 0.7, which results in a wider field of view, brighter images and less exposure time. This field flattener\/focal reducer boasts fully multi-coated optics and comes with 2 adapters to accommodate different focuser sizes.\u003cbr\u003e\u003cbr\u003eThe field flattener\/focal reducer offers 55 mm of back focus from the rear flange. The M42x0.75 adapter is 6.25 mm thick.\u003cbr\u003e\u003cbr\u003eWhile technically this was designed for the F\/8 system, through user experiences and our subsequent testing we have concluded that our 3-inch field flattener\/reducer performs very well with our F\/7.5 refractors.\u003c\/p\u003e\n\u003ch5\u003eSpecifications\u003c\/h5\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ctable width=\"100%\" height=\"200\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd width=\"%\" bgcolor=\"#D3D3D3\"\u003e \u003c\/td\u003e\n\u003ctd width=\"28%\" bgcolor=\"#dad4d4\"\u003eDescription\u003c\/td\u003e\n\u003ctd width=\"70%\" bgcolor=\"#dad4d4\"\u003e3\" Field Flattener .7x Focal Reducer for ED APO 152mm F\/8 and ES Refractors down to F\/7.5\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd bgcolor=\"#EFEFEF\"\u003e \u003c\/td\u003e\n\u003ctd bgcolor=\"#eeeeef\"\u003eItem Number\u003c\/td\u003e\n\u003ctd bgcolor=\"#eeeeef\"\u003eFFFR507X-00\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd bgcolor=\"#D3D3D3\"\u003e \u003c\/td\u003e\n\u003ctd bgcolor=\"#dad4d4\"\u003eWeight\u003c\/td\u003e\n\u003ctd bgcolor=\"#dad4d4\"\u003e1.4lb; .64kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd bgcolor=\"#EFEFEF\"\u003e \u003c\/td\u003e\n\u003ctd bgcolor=\"#eeeeef\"\u003eDiameter\u003c\/td\u003e\n\u003ctd bgcolor=\"#eeeeef\"\u003e78.3mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd bgcolor=\"#D3D3D3\"\u003e \u003c\/td\u003e\n\u003ctd bgcolor=\"#dad4d4\"\u003eHeight\u003c\/td\u003e\n\u003ctd bgcolor=\"#dad4d4\"\u003e90.1mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e","brand":"Explore Scientific","offers":[{"title":"Default Title","offer_id":15431585955933,"sku":"FFFR507X-00","price":399.99,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/products\/ff_fr.jpg?v=1543617883"},{"product_id":"explore-scientific-2-field-flattener","title":"Field Flattener For f\/5 to f\/7 Refractors","description":"\u003cp\u003e \u003c\/p\u003e\n\u003cdiv class=\"product-main\"\u003e\n\u003cdiv class=\"product-description rte\"\u003e\n\u003cdiv class=\"tab-pane tabactive\" id=\"tab-0\"\u003e\n\u003cdiv class=\"tabcontent\"\u003e\n\u003cul\u003e\n\u003cli\u003eThis is a field flattener for refractor-type telescopes with a focal ratio of f\/5 to f\/7\u003c\/li\u003e\n\u003cli\u003eCauses no change to the telescope focal length\u003c\/li\u003e\n\u003cli\u003e2-inch barrel to easily attach to a two-inch focuser\u003c\/li\u003e\n\u003cli\u003eFully multi-coated optics\u003c\/li\u003e\n\u003cli\u003eT-ring thread on the device so a T-ring can be used to easily attach a DSLR camera or a dedicated astrocamera\u003c\/li\u003e\n\u003cli\u003e38 mm of clear aperture\u003c\/li\u003e\n\u003cli\u003eRequires 55mm (+\/-2) of back focus\/spacing between the device and the camera sensor\u003c\/li\u003e\n\u003cli\u003ePremium high glossy anodizing finish\u003c\/li\u003e\n\u003cli\u003eIncludes both M42 and M48 adapters\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eWhen doing astrophotography with refractor-type telescopes, the faster the focal ratio the more field curvature becomes a problem. Field curvature will appear in the corners of astrophotographs, making the stars smear perpendicular to the axis of the image. This is called coma -- coma is Latin for comet, because the stars look like comets. The more the curvature, the closer to the center the coma appears. The larger the sensor, the worse the coma.\u003c\/p\u003e\n\u003cp\u003eAstrophotographers can easily correct the coma by using a field flattener – an optical device that goes between the telescope and the camera. Field fatteners are not interchangeable, because these devices are designed to work with a small range of focal ratios.\u003c\/p\u003e\n\u003cp\u003eThe Explore Scientific field flattener is designed to work with telescopes with focal ratios between f\/5 and f\/7. Our device requires 55 mm (+\/-2 mm) of spacing between the back of the device and the camera sensor.\u003c\/p\u003e\n\u003cp\u003e\u003cmeta charset=\"utf-8\"\u003e\u003cstrong\u003eFits the following Explore Scientific telescopes:\u003c\/strong\u003e\u003cbr\u003eDAR1020765-01\u003cbr\u003eDAR127065-02\u003cbr\u003eDAR152065-01\u003cbr\u003eES-ED0806-02\u003cbr\u003eES-ED10207-02\u003cbr\u003eFCD100-0806-01\u003cbr\u003eFCD100-10207-02\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cp\u003e \u003c\/p\u003e","brand":"Explore Scientific","offers":[{"title":"Default Title","offer_id":29071608971357,"sku":"ES-FF2F5\/F7","price":139.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/products\/ES-FF2F5_F7_2_2000x2000_1702c3bc-29fd-432f-988b-6c228fc84849.webp?v=1764203588"},{"product_id":"william-optics-reducer-flattener-gt71-gt81-z103","title":"0.8x Reducer Flattener for GT71 \/GT81 \/Z103","description":"\u003ch5\u003eDescription\u003c\/h5\u003e\n\u003cp\u003eThis William Optics 2\" Field Flattener and Reducer has been designed to optimize the flat-field imaging performance of William Optics GT71, GT81, Z81 \u0026amp; Z103 refactors. The APO triplet optics of the Field Flattener and Reducer are made with Ohara glass and fully multi-coated to provide good illumination and a beautifully flat field across 97% of full frame sensors. The reducing factor is 0.8X.\u003c\/p\u003e\n\u003cp\u003eDesigned with M63 threads on the telescope side, the Field Flattener and Reducer will thread directly into the telescope. Just remove the three screws on the focuser adapter, take off the adapter, and thread the focal reducer\/field flattener on in it's stead. The Field Flattener and Reducer has 2\" threads on the opposite side to accept a 48mm (Wide) T ring for your DSLR. There is even a slot behind the 2\" threads to accept an M48 filter.\u003c\/p\u003e\n\u003cp\u003eThe Field Flattener and Reducer is adjustable to help you achieve the proper back focus. Adjustment distances \u0026amp; back focus, as well as the image circle measurement for each of the telescopes are listed below.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eFull frame size\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eDesigned with nearly Full frame chip-size DSLR cameras in mind.\u003c\/li\u003e\n\u003cli\u003eFMC tripllet APO design.\u003c\/li\u003e\n\u003cli\u003eProduced entirely with the best Ohara optical glasses.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eAmazing\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eReducing factor 0.8X.\u003c\/li\u003e\n\u003cli\u003eAdjustable design, for perfect back focus it can be used with other models of refractor\u003c\/li\u003e\n\u003cli\u003e48mm filter ready\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eSuperb Finish\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eWilliam Optics polished anodized finish.\u003c\/li\u003e\n\u003cli\u003eAll internal surfaces threaded and blackened to prevent reflections.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eEasy to Use\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eWill accept any standard 48mm wide T-ring for your camera. Not compatible with smaller 42mm T rings.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eSuitable for\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eNewer GT71, GT81, Z81, Z103 scopes that have a female M63 thread.  Please check your telescope before ordering.  \u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eAmount of adjustment for DSLR or mirrorless camera:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eGT71 - 9.1 mm\u003c\/li\u003e\n\u003cli\u003eGT81 - 7.1 mm\u003c\/li\u003e\n\u003cli\u003eZ103 - 2.5 mm\u003c\/li\u003e\n\u003cli\u003eZ81 - 5.2 mm\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eBack focus:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eGT71 - 64.1 mm\u003c\/li\u003e\n\u003cli\u003eGT81 - 62.1 mm\u003c\/li\u003e\n\u003cli\u003eZ103 - 57.5 mm\u003c\/li\u003e\n\u003cli\u003eZ81 - 60.2 mm\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eImage Circle:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eGT71 - 44.4 mm\u003c\/li\u003e\n\u003cli\u003eGT81 - 44.4 mm\u003c\/li\u003e\n\u003cli\u003eZ103 - 43.1 mm\u003c\/li\u003e\n\u003cli\u003eZ81 - 44.3 mm\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"William Optics","offers":[{"title":"Default Title","offer_id":30308978425949,"sku":"P-FLAT6AIII","price":269.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/products\/img_4249_2.png?v=1608486821"},{"product_id":"william-optics-field-flattener-flt132-gt102","title":"1.0x Full Frame Flattener for FLT132, FLT153","description":"\u003cp\u003eHigh-quality adjustable field flattener for FLT132 \/ GT102 \/ FLT153\u003c\/p\u003e\n\u003ch5\u003eFeatures\u003cbr\u003e\n\u003c\/h5\u003e\n\u003cp\u003e\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/FLAT_68III_1.jpg?v=1599678917\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/FLAT_68III_2.jpg?v=1599678895\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/FLAT_68III_3.jpg?v=1599678869\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/FLAT_68III_4.jpg?v=1599678843\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/FLAT_68III_5.jpg?v=1599678824\"\u003e\u003c\/p\u003e\n\u003ch5\u003eSpecifications\u003c\/h5\u003e\n\u003cp\u003e\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/FLAT_68III_6.jpg?v=1599678789\"\u003e\u003c\/p\u003e\n\u003ch5\u003eSupport\u003c\/h5\u003e\n\u003cp\u003e\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/FLAT_68III_7.jpg?v=1599678761\"\u003e\u003c\/p\u003e","brand":"William 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src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/FLAT_7A_3.jpg?v=1602355651\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/FLAT_7A_4.jpg?v=1602355670\"\u003e\u003c\/p\u003e\n\u003ch5\u003eSpecifications\u003c\/h5\u003e\n\u003cp\u003e\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/FLAT_7A_6.jpg?v=1602355706\"\u003e\u003c\/p\u003e\n\u003ch5\u003eInstallation\u003c\/h5\u003e\n\u003cp\u003e\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/FLAT_7A_7.jpg?v=1602355734\"\u003e\u003c\/p\u003e","brand":"William Optics","offers":[{"title":"Default Title","offer_id":30308978819165,"sku":"P-FLAT7A","price":788.0,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/products\/img_4902.png?v=1602355509"},{"product_id":"william-optics-0-72-full-frame-reducer-flattener","title":"0.72x Full frame Reducer Flattener for FLT132, FLT153","description":"\u003cp\u003eX0.72 Full frame Reducer flattener ,Triplet APO Design \u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003eFor GT102,FLT132 and GT153 only, (GT102 must with 3” Focuser )\u003c\/p\u003e\n\u003cp\u003e\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/FLAT_8_4.jpg?v=1610760449\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/FLAT_8_6_1.jpg?v=1610760473\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/FLAT_8_7.jpg?v=1610760497\"\u003e\u003c\/p\u003e","brand":"William Optics","offers":[{"title":"Default Title","offer_id":30308978884701,"sku":"P-FLAT8","price":699.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/products\/img_1844.png?v=1610760291"},{"product_id":"tele-vue-0-8x-focal-reducer-flattener-for-tele-vue-102-scope","title":"Tele Vue 0.8x Focal Reducer\/Flattener for Tele Vue 102is","description":"\u003cmeta charset=\"utf-8\"\u003e\n\u003cp\u003eThis Tele Vue 0.8x Focal Reducer\/Flattener for Tele Vue 102 is designed to provide both a reduction in focal length (by a factor of 0.8) and also flatten the image field, for obtaining the best images. Specifically for the Tele Vue 102 telescope.\u003c\/p\u003e\n\u003cp\u003eFor up to 43 mm diagonal formats, it's constructed to fit both the standard 2\" focuser of the TV-102 and the threaded TV-102iis accessories on the input end. Requires CWT-1070, STL-1071, or TRG-1072 to connect to your CCD camera.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eSpecifications:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cmeta charset=\"utf-8\"\u003e\n\u003ctable id=\"product-attribute-specs-table\" class=\"table table--scope-row\" role=\"table\" tabindex=\"0\"\u003e\n\u003ccaption class=\"table__caption\"\u003e\u003cbr\u003e\u003c\/caption\u003e\n\u003ctbody\u003e\n\u003ctr role=\"row\"\u003e\n\u003cth scope=\"row\" role=\"rowheader\"\u003e\n\u003cdiv class=\"table__heading-wrapper\"\u003eModel Number\n\u003cdiv class=\"tooltip\"\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/th\u003e\n\u003ctd class=\"data\" data-th=\"Model Number\" role=\"gridcell\"\u003eRFL-4087\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr role=\"row\"\u003e\n\u003cth scope=\"row\" role=\"rowheader\"\u003e\n\u003cdiv class=\"table__heading-wrapper\"\u003eOptical Modifier or Adapter\n\u003cdiv class=\"tooltip\"\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/th\u003e\n\u003ctd class=\"data\" data-th=\"Optical Modifier or Adapter\" role=\"gridcell\"\u003eReducer\/Field Flattener\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr role=\"row\"\u003e\n\u003cth scope=\"row\" role=\"rowheader\"\u003e\n\u003cdiv class=\"table__heading-wrapper\"\u003eWarranty\n\u003cdiv class=\"tooltip\"\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/th\u003e\n\u003ctd class=\"data\" data-th=\"Warranty\" role=\"gridcell\"\u003eTele Vue 5 Years\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e","brand":"Tele Vue","offers":[{"title":"Default Title","offer_id":31388470837341,"sku":"RFL-4087","price":446.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/products\/08_reducer_for_102_scopes.jpg?v=1574288383"},{"product_id":"evoguide-50ed-flattener","title":"Evoguide 50ED Flattener","description":"\u003cul data-mce-fragment=\"1\"\u003e\n\u003cli data-mce-fragment=\"1\"\u003eCorrects for field curvature, allowing the Evoguide 50ED and 50DX to be used for astrophotography\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003eThread on metal caps\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003eT-thread connection or 1.25\" opening for camera mounting\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e28mm imaging circle\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e17.5mm back focus\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e5.33 x 3.57-degree field of view when used with APS-C crop sensor \u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Sky-Watcher","offers":[{"title":"Default Title","offer_id":36803584884903,"sku":"S20214","price":115.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/products\/S20214_Evo50_Flat_web_1800x1800_f259e36c-c725-4732-b384-85b858d2b4e0.jpg?v=1617912009"},{"product_id":"0-8x-reducer-flattener-for-flt91","title":"0.8x Reducer Flattener for Fluorostar 91","description":"\u003ch5\u003eDescription\u003c\/h5\u003e\n\u003cp\u003e\u003cstrong\u003eFor FLT 91 ONLY! Special edition flattener\/reducer with adapter for the Fluorostar 91 telescope.\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eNote: \u003cmeta charset=\"utf-8\"\u003e\n\u003cspan data-mce-fragment=\"1\"\u003eAdjustment Distance for DSLR and Mirrorless Cameras (and other cameras with the same backspacing) is 5.4mm\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThis William Optics 2\" Field Flattener and Reducer has been designed to optimize the flat-field imaging performance of William Optics GT71, GT81, Z81 \u0026amp; Z103 refactors. The APO triplet optics of the Field Flattener and Reducer are made with Ohara glass and fully multi-coated to provide good illumination and a beautifully flat field across 97% of full frame sensors. The reducing factor is 0.8X.\u003c\/p\u003e\n\u003cp\u003eDesigned with M63 threads on the telescope side, the Field Flattener and Reducer will thread directly into the telescope. Just remove the three screws on the focuser adapter, take off the adapter, and thread the focal reducer\/field flattener on in its stead. The Field Flattener and Reducer has 2\" threads on the opposite side to accept a 48mm (Wide) T ring for your DSLR. There is even a slot behind the 2\" threads to accept an M48 filter.\u003c\/p\u003e\n\u003cp\u003eThe Field Flattener and Reducer is adjustable to help you achieve the proper back focus. 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Not compatible with smaller 42mm T rings.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eSuitable for\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eSpecial Edition for Fluorostar 91.  \u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul\u003e\u003c\/ul\u003e","brand":"William Optics","offers":[{"title":"Default Title","offer_id":39472503292071,"sku":"P-FLAT6AIII-M92","price":348.0,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/products\/flat6aiii.jpg?v=1616441298"},{"product_id":"m63-female-to-2-inch-push-in-adapter-for-p-flat6aiii","title":"M63 (Female) to 2 Inch Push-in Adapter for P-FLAT6AIII","description":"\u003cp\u003e\u003cstrong\u003eM63 (Female) to 2 Inch Push-in Adapter for P-FLAT6AIII\u003c\/strong\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003eWith this 2” adapter, connect the FLAT6AIII flattener to most refractors from 3”~ 4” f6.5 ~ f8 APO that have a 2” barrel.\u003c\/p\u003e\n\u003cp\u003eNote: End of 2” barrel has 48mm threads.\u003c\/p\u003e\n\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003cul\u003e\u003c\/ul\u003e\n\u003cul\u003e\u003c\/ul\u003e","brand":"William Optics","offers":[{"title":"Default Title","offer_id":39711678726311,"sku":"YE-M63F-2IN-PI","price":48.0,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/products\/img_5175.png?v=1618804992"},{"product_id":"4-inch-extension-tube-for-flt-series","title":"4 inch Extension tube for FLT series","description":"\u003cp\u003e\u003cstrong\u003eWilliam Optics 4\" Extension tube for FLT series.\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eWilliam Optics 4\" Extension tube\u003c\/b\u003e for FLT 98,FLT 110 and FLT 132 telescopes is very useful if you use a CCD or need more drawtube extension but still expect flexure in your train. The \u003cb\u003eWilliam Optics 4\" Extension tube\u003c\/b\u003e is fully anodized, and compatible with other similar \u003cb\u003etelescopes\u003c\/b\u003e. To mount the \u003cb\u003eWilliam Optics 4\" Extension Tube\u003c\/b\u003e on the \u003cb\u003etelescopes\u003c\/b\u003e, simply remove the 4\" nosepiece adapter for the telescope and thread the extender in.\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eFeatures of William Optics 4\" Extension Tube:\u003c\/b\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eFully anodized\u003c\/li\u003e\n\u003cli\u003eCompatible with other similar telescopes\u003c\/li\u003e\n\u003cli\u003eMale \u0026amp; Female thread\u003c\/li\u003e\n\u003cli\u003eAccepts the TMB field flattener for FLT\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul\u003e\u003c\/ul\u003e\n\u003cul\u003e\u003c\/ul\u003e","brand":"William Optics","offers":[{"title":"Default Title","offer_id":39711729877159,"sku":"P-M92EX","price":68.0,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/products\/p-exflt_02a.jpg?v=1618805268"},{"product_id":"evolux-82ed-reducer-flattener-0-9x","title":"Evolux 82ED Reducer\/Flattener (0.9x) - Clearance","description":"\u003cp data-mce-fragment=\"1\"\u003e0.9x thread-on reducer\/corrector produces a flat field across the entire image while shortening exposure time by 24%. \u003cspan data-mce-fragment=\"1\"\u003eOptimized for Evolux 82mm refractors.\u003c\/span\u003e\u003c\/p\u003e\n\u003cul data-mce-fragment=\"1\"\u003e\n\u003cli data-mce-fragment=\"1\"\u003e82mm, f\/5.8, 477mm focal length\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e55mm back focus\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e36mm illuminated field\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003eIncludes one ED element\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003eM56x1 female \/ M48 male threads\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003eIncludes rotator\/adapter with built-in cavity for 2-inch filters\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul\u003e\u003c\/ul\u003e","brand":"Sky-Watcher","offers":[{"title":"Default Title","offer_id":42578647187715,"sku":"S20207","price":385.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/products\/S20207_Evolux82_ReducerFlattener_02_1800x1800_c2b8e5fc-81b3-4327-9fc4-ed6bf83ededa.jpg?v=1647374836"},{"product_id":"tele-vue-0-8x-reducer","title":"Tele Vue 0.8x Reducer\/Flattener","description":"\u003cp\u003e\u003cspan\u003eModel TRF-2008 0.8x Reducer\/Flattener converts TV-85 to 480mm f\/5.6 and TV-76 to 380mm f\/5.0 for flat field, fast photography. Fully multi-coated 3-element unit with 48mm filter thread inserts directly into 2\" focuser, accepts standard T-rings for 35mm cameras. \"This accessory is a must-have for someone planning to use the TV-85 photographically\" - review in Sky \u0026amp; Telescope, July 1999. **\u003cstrong\u003eAlso it can be used with any 400-600mm refractor.** \u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cdiv class=\"pageSectionTitle\"\u003e\u003c\/div\u003e\n\u003cdiv class=\"pageSectionTitle\"\u003e\u003cmeta charset=\"utf-8\"\u003e\u003c\/div\u003e\n\u003ch5 class=\"pageSectionTitle\"\u003e\u003c\/h5\u003e","brand":"Tele Vue","offers":[{"title":"Default Title","offer_id":42608134291715,"sku":"TRF-2008","price":403.0,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/products\/TRF_2008_0.8xRFRef400_600copy.jpg?v=1648923766"},{"product_id":"flat68iii-longer-adjusting-adapter-for-wifd-gt81-m48","title":"FLAT68III longer adjusting adapter for WIFD GT81-M48","description":"\u003cp data-mce-fragment=\"1\"\u003eThis adapter for the William Optics Gran Turismo 81 WIFD has an M48x0.75 male thread on one end and an M80x0.75 female thread on the other. It has a length of 54 mm.\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003eTo use this adapter, simply unscrew the original end adapter that terminates in the M48 male thread on the flattener and replace it with this longer adapter.\u003c\/p\u003e","brand":"William Optics","offers":[{"title":"Default Title","offer_id":44841883336963,"sku":"AD-M80-54-M48","price":68.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/s__41542169.jpg?v=1710411333"},{"product_id":"flat68iii-longer-adjusting-adapter-for-wifd-gt81-m54","title":"FLAT68III longer adjusting adapter for WIFD GT81-M54","description":"\u003cp\u003eThis adapter for the William Optics Gran Turismo 81 WIFD has an M54x0.75 male thread on one end and an M80x0.75 female thread on the other. It has a length of 54 mm.\u003c\/p\u003e\n\u003cp\u003eTo use this adapter, simply unscrew the original end adapter that terminates in the M48 male thread on the flattener and replace it with this longer adapter.\u003c\/p\u003e","brand":"William Optics","offers":[{"title":"Default Title","offer_id":44841907945731,"sku":"AD-M80-54-M54","price":68.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/s__41542171-2_1.jpg?v=1710411519"},{"product_id":"m80-to-m68-flattener-adapter-flat68iii-flat7a","title":"M80 to M68 Flattener adapter (Flat68III, Flat7A)","description":"\u003cp\u003e\u003cspan\u003eFor Williams Optics scopes and Field Flatteners, adapts M80 to M68. (M80 to M68 x 1.0) (Flat68III, Flat7A)\u003c\/span\u003e\u003c\/p\u003e","brand":"William Optics","offers":[{"title":"Default Title","offer_id":44841939435779,"sku":"AD-M80TOM68","price":58.0,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/01_1_1.jpg?v=1710411681"},{"product_id":"m80-to-m54-flattener-adapter-flat68iii-flat7a","title":"M80 to M54 Flattener adapter (Flat68III, Flat7A)","description":"\u003cp\u003e\u003cspan\u003eFor Williams Optics scopes and Field Flatteners, adapts M80 to M54. (M80 to M54 x 0.75) (Flat68III, Flat7A)\u003c\/span\u003e\u003c\/p\u003e","brand":"William Optics","offers":[{"title":"Default Title","offer_id":44841948250371,"sku":"AD-M80TOM54","price":58.0,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/0001.jpg?v=1710411814"},{"product_id":"longer-adjusting-adapter-for-flat68iii-flat7a","title":"Longer adjusting adapter for FLAT68III, FLAT7A","description":"\u003cp\u003e\u003cspan\u003eFor Williams Optics scopes and Field Flatteners, adapts M80 to M48. (M80 to M48 x 0.75) (Flat68III, Flat7A)\u003c\/span\u003e\u003c\/p\u003e","brand":"William Optics","offers":[{"title":"Default Title","offer_id":44841976561923,"sku":"AD-M80-45-M48","price":58.0,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/william-optics-accessory-william-optics-m80-to-m48-adapter-to-use-flat68iii-and-flt91-or-flat-7a-and-flt120-ad-m80-45-m48-38366801625307.webp?v=1710412123"},{"product_id":"adapter-for-flat-6a-to-flt91","title":"Adapter for Flat 6A to FLT91","description":"\u003cp\u003e\u003cspan\u003eThe William Optics M92-to-M63 adapter is designed to allow the Flat6AIII flattener\/reducer to be used in combination with the FLT91 telescope. \u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan data-mce-fragment=\"1\"\u003eRequired to use the Flat6AIII flattener\/reducer with FLT91.\u003c\/span\u003e\u003c\/p\u003e","brand":"William Optics","offers":[{"title":"Default Title","offer_id":44842034331907,"sku":"YE-M92-63","price":88.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/ye-m92-63-03.jpg?v=1710412682"},{"product_id":"0-8x-focal-reducer","title":"0.8x Focal Reducer","description":"\u003cp\u003e\u003cspan\u003eThe NEW Explore Scientific 0.8x Focal Reducer lets astrophotographers explore the wonders of wide-field astrophotography in an easy-to-use package.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eThe 0.8x Focal Reducer works with the following Explore Scientific telescopes:\u003c\/span\u003e\u003c\/p\u003e\n\u003cul type=\"disc\"\u003e\n\u003cli\u003e\u003cspan\u003eES-ED0806-02\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eES-ED10207-02\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eFCD100-0806-02\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eFCD100-10207-02\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eFCD100-10207-CF-01\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cspan\u003eThe 2-element 0.8x focal reducer turns the 480-mm-focal-length telescopes into devices with a focal length of 384 mm. This changes the telescopes from an f\/ratio of f\/6 to a much faster f\/4.8.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eThe device turns the 102 mm telescopes, with a focal length of 714 mm, into telescopes with a focal length of 571 mm: From f\/7 to f\/5.6.\u003c\/span\u003e\u003cspan\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eCompare this with smaller diameter wide-field telescopes. The Explore Scientific ES and FCD100 80mm telescopes offer significantly more light-gathering aperture. The ES and FCD100 telescopes gather:\u003c\/span\u003e\u003c\/p\u003e\n\u003cul type=\"disc\"\u003e\n\u003cli\u003e\u003cspan\u003e1.3 times more light than a 70 mm telescope\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003e1.8 times more light than a 60 mm telescope\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eA whopping 2.6 times more light than a 50 mm telescope\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cspan\u003eThe faster f\/ratio, coupled with more light-gathering aperture, allows more light to fall onto the camera sensor. For instance, to capture the same amount of light as a 100-second exposure with the Explore Scientific 80 mm takes 256 seconds on a  50 mm, 178 seconds on a 60 mm, and 131 sec on 70 mm – assuming the same f\/ratio. This means that the Explore Scientific 80mm telescope with the 0.8x Focal Reducer can capture far more detail faster than the competition.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eThe focal reducer, which has 55 mm (+\/- 2 mm) of back spacing, is threaded to accept a standard 42 mm T-ring, making attaching a camera easy. \u003c\/span\u003e\u003c\/p\u003e","brand":"Explore Scientific","offers":[{"title":"Default Title","offer_id":46739499974915,"sku":"ES-FR0.8x","price":139.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/ES-FR0.8X_1_2400x2400_ddc6cd3b-3e4b-4882-8ee0-5e5f53261d9e.webp?v=1744324147"},{"product_id":"open-box-es-field-flattener-for-f-5-to-f-7-refractors","title":"Open Box ES Field Flattener For f\/5 to f\/7 Refractors","description":"\u003ch3\u003ePRICE DROP!  Was $130, now just $100!\u003c\/h3\u003e\n\u003ch4\u003eCondition:\u003c\/h4\u003e\n\u003cp\u003eThis is an open box return in excellent condition. The outer body is unmarked and the optics are clean. Though, this is missing and \u003cspan style=\"text-decoration: underline;\"\u003edoes not include\u003c\/span\u003e the M48 adapter. Otherwise it is practically new and includes the original box. \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch4\u003eDescription:\u003c\/h4\u003e\n\u003cdiv class=\"product-main\"\u003e\n\u003cdiv data-product-description=\"\" class=\"product-description rte\"\u003e\n\u003cdiv id=\"tab-0\" class=\"tab-pane tabactive\"\u003e\n\u003cdiv class=\"tabcontent\"\u003e\n\u003cul\u003e\n\u003cli data-open-accessibility-text-original=\"16px\"\u003eThis is a field flattener for refractor-type telescopes with a focal ratio of f\/5 to f\/7\u003c\/li\u003e\n\u003cli data-open-accessibility-text-original=\"16px\"\u003eCauses no change to the telescope focal length\u003c\/li\u003e\n\u003cli data-open-accessibility-text-original=\"16px\"\u003e2-inch barrel to easily attach to a two-inch focuser\u003c\/li\u003e\n\u003cli data-open-accessibility-text-original=\"16px\"\u003eFully multi-coated optics\u003c\/li\u003e\n\u003cli data-open-accessibility-text-original=\"16px\"\u003eT-ring thread on the device so a T-ring can be used to easily attach a DSLR camera or a dedicated astrocamera\u003c\/li\u003e\n\u003cli data-open-accessibility-text-original=\"16px\"\u003e38 mm of clear aperture\u003c\/li\u003e\n\u003cli data-open-accessibility-text-original=\"16px\"\u003eRequires 55mm (+\/-2) of back focus\/spacing between the device and the camera sensor\u003c\/li\u003e\n\u003cli data-open-accessibility-text-original=\"16px\"\u003ePremium high glossy anodizing finish\u003c\/li\u003e\n\u003cli data-open-accessibility-text-original=\"16px\"\u003eIncludes both M42 and M48 adapters\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-open-accessibility-text-original=\"16px\"\u003eWhen doing astrophotography with refractor-type telescopes, the faster the focal ratio the more field curvature becomes a problem. Field curvature will appear in the corners of astrophotographs, making the stars smear perpendicular to the axis of the image. This is called coma -- coma is Latin for comet, because the stars look like comets. The more the curvature, the closer to the center the coma appears. The larger the sensor, the worse the coma.\u003c\/p\u003e\n\u003cp data-open-accessibility-text-original=\"16px\"\u003eAstrophotographers can easily correct the coma by using a field flattener – an optical device that goes between the telescope and the camera. Field fatteners are not interchangeable, because these devices are designed to work with a small range of focal ratios.\u003c\/p\u003e\n\u003cp data-open-accessibility-text-original=\"16px\"\u003eThe Explore Scientific field flattener is designed to work with telescopes with focal ratios between f\/5 and f\/7. Our device requires 55 mm (+\/-2 mm) of spacing between the back of the device and the camera sensor.\u003c\/p\u003e\n\u003cp data-open-accessibility-text-original=\"16px\"\u003e\u003cmeta charset=\"utf-8\"\u003e\u003cstrong\u003eFits the following Explore Scientific telescopes:\u003c\/strong\u003e\u003cbr\u003eDAR1020765-01\u003cbr\u003eDAR127065-02\u003cbr\u003eDAR152065-01\u003cbr\u003eES-ED0806-02\u003cbr\u003eES-ED10207-02\u003cbr\u003eFCD100-0806-01\u003cbr\u003eFCD100-10207-02\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cp\u003e \u003c\/p\u003e","brand":"Explore Scientific","offers":[{"title":"Default Title","offer_id":47481035522307,"sku":"OB2511-ES-FF2F5\/F7","price":100.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/E9EE727E-717B-4CED-B0F7-95539F95A49F.png?v=1764203588"}],"url":"https:\/\/milehighastro.com\/collections\/field-flatteners-reducers.oembed","provider":"Mile High Astronomy","version":"1.0","type":"link"}