{"title":"Used Filters","description":"","products":[{"product_id":"zwo-2-green-imaging-filter","title":"Used ZWO 2\" Green Imaging Filter","description":"\u003ch3\u003ePRICE DROP:  Was $50, now $30!!!\u003c\/h3\u003e\n\u003cp\u003eThis 2'' green filter was part of a set of 4 ZWO LRGB filters that we are selling individually.  It is in excellent condition, with clean glass and coatings.  Comes in its original jewel case.   \u003c\/p\u003e\n\u003cp\u003e  \u003c\/p\u003e\n\u003cp\u003e   \u003c\/p\u003e\n\u003cp\u003eZWO's 2\" filter design boasts excellent 92% transmission at passband, great optical coatings, and good color separation.\u003c\/p\u003e\n\u003cp\u003eThe LRGB filters have a mechanical thickness of 5mm, with an additional 2.5mm added for the thread. The optical thickness measures in at 1.85mm. Each filter is more parfocal with a thickness of 1.9+\/-0.03 mm. As for the thread, this filter comes with a M48x0.75 thread.\u003c\/p\u003e\n\u003cp\u003eEach filter is fine-optically polished to reach an accuracy of 1\/4 wave and is equipped with anti-reflection coatings.  Additionally, the ZWO LRGB filters have precision off-brand blocking.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ctable id=\"product-attribute-specs-table\" class=\"table table--scope-row\" role=\"table\" tabindex=\"0\"\u003e\n\u003ccaption class=\"table__caption\"\u003eProduct specification\u003c\/caption\u003e\n\u003ctbody\u003e\n\u003ctr role=\"row\"\u003e\n\u003cth scope=\"row\" role=\"rowheader\"\u003e\n\u003cdiv class=\"table__heading-wrapper\"\u003eSKU Number\u003c\/div\u003e\n\u003c\/th\u003e\n\u003ctd class=\"data\" data-th=\"SKU Number\" role=\"gridcell\"\u003eZWO-LRGB2\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\"\u003eModel Number\u003c\/div\u003e\n\u003c\/th\u003e\n\u003ctd class=\"data\" data-th=\"Model Number\" role=\"gridcell\"\u003eLRGB2\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\"\u003eSingle Filter, Set, or Accessory\u003c\/div\u003e\n\u003c\/th\u003e\n\u003ctd class=\"data\" data-th=\"Single Filter, Set, or Accessory\" role=\"gridcell\"\u003eFilter Set\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\"\u003eFilter Type\u003c\/div\u003e\n\u003c\/th\u003e\n\u003ctd class=\"data\" data-th=\"Filter Type\" role=\"gridcell\"\u003eRGB Sets\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\"\u003eFilter Size\u003c\/div\u003e\n\u003c\/th\u003e\n\u003ctd class=\"data\" data-th=\"Filter Size\" role=\"gridcell\"\u003e50.8mm (2\")\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\"\u003eFilter Shape\u003c\/div\u003e\n\u003c\/th\u003e\n\u003ctd class=\"data\" data-th=\"Filter Shape\" role=\"gridcell\"\u003eRound\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\"\u003eFilter Insert Style\u003c\/div\u003e\n\u003c\/th\u003e\n\u003ctd class=\"data\" data-th=\"Filter Insert Style\" role=\"gridcell\"\u003eThreaded\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\"\u003eFilter Optical Thickness\u003c\/div\u003e\n\u003c\/th\u003e\n\u003ctd class=\"data\" data-th=\"Filter Optical Thickness\" role=\"gridcell\"\u003e1.85 mm\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\"\u003eFilter Mechanical Thickness\u003c\/div\u003e\n\u003c\/th\u003e\n\u003ctd class=\"data\" data-th=\"Filter Mechanical Thickness\" role=\"gridcell\"\u003e7.5 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c!----\u003e","brand":"ZWO","offers":[{"title":"Default Title","offer_id":45435529756931,"sku":"U2405-SB-ZWOG2","price":30.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/446062110_1428019221410766_1718040286616408169_n.jpg?v=1716492855"},{"product_id":"used-zwo-nikon-lens-short-adapter-for-zwo-1-25-31mm-36mm-electronic-filter-wheel","title":"Used ZWO Nikon Lens Short Adapter for ZWO 1.25”\/31mm\/36mm Electronic Filter Wheel","description":"\u003cp class=\"has-luminous-vivid-amber-color has-text-color wp-block-heading\"\u003eThis is a ZWO short adapter for a Nikon in excellent condition, with no marks, dings, sleeks, or scratches.  It comes in its original box.  You may need a \u003ca rel=\"noopener\" href=\"https:\/\/milehighastro.com\/products\/used-zwo-filter-drawer-for-nikon-lens\" target=\"_blank\"\u003eZWO Filter Drawer for Nikon\u003c\/a\u003e to use this with an EFW.  At the time of listing, we do have \u003ca rel=\"noopener\" href=\"https:\/\/milehighastro.com\/products\/used-zwo-filter-drawer-for-nikon-lens\" target=\"_blank\"\u003ea used one\u003c\/a\u003e for sale.  \u003c\/p\u003e\n\u003cp class=\"has-luminous-vivid-amber-color has-text-color wp-block-heading\"\u003e\u003cspan\u003e   \u003c\/span\u003e\u003c\/p\u003e\n\u003ch1 class=\"has-luminous-vivid-amber-color has-text-color wp-block-heading\"\u003e\n\u003cspan\u003e\u003c\/span\u003e\u003cbr\u003e\n\u003c\/h1\u003e\n\u003cdiv class=\"product info description\"\u003e\n\u003cdiv class=\"value\"\u003e\n\u003cdiv class=\"product attribute description\"\u003e\n\u003cdiv class=\"value\"\u003e\n\u003cp\u003eThis ZWO Nikon Lens Short Adapter for ZWO 1.25”\/31mm\/36mm Electronic Filter Wheels allows you to connect small format ZWO cameras with a ZWO 1.25\"\/31mm\/36mm filter wheel to a Nikon F-mount lens. Please see the full compatibility list below to ensure this adapter is correct for your camera.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003eThere are four Nikon lens to ZWO camera adapters:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003ca href=\"https:\/\/agenaastro.com\/zwo-filter-drawer-for-nikon-lens-fd-nikon.html\"\u003eZWO Filter Drawer for Nikon Lens # FD-Nikon\u003c\/a\u003e\u003cspan\u003e \u003c\/span\u003e- best for color cameras with use of a 2\" filter\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"https:\/\/agenaastro.com\/zwo-nikon-lens-adapter-for-2-electronic-filter-wheel-efw2-nikon.html\"\u003eZWO Nikon Lens Adapter for ZWO 2\" Electronic Filter Wheel # EFW2-Nikon\u003c\/a\u003e\u003cspan\u003e \u003c\/span\u003e- best for large format monochrome cameras that use a 2\" filter wheel\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"https:\/\/agenaastro.com\/zwo-nikon-lens-short-adapter-for-electronic-filter-wheel-efw-nikon-ii.html\"\u003eZWO Nikon Lens Short Adapter for ZWO 1.25”\/31mm\/36mm Electronic Filter Wheel # EFW-NIKON-II\u003c\/a\u003e\u003cspan\u003e \u003c\/span\u003e- best for small format monochrome cameras that use a 1.25\"\/31mm\/36mm filter wheel\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003e(this product)\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"https:\/\/agenaastro.com\/zwo-t2-thread-to-nikon-lens-adapter-for-all-asi-cameras-nikon-t2-ii.html\"\u003eZWO T2 Thread to Nikon Lens Adapter for all ASI Cameras # NIKON-T2-II\u003c\/a\u003e\u003cspan\u003e \u003c\/span\u003e- best for connecting most ZWO cameras without the need for quickly changing filters\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch3\u003e\u003cstrong\u003eCompatibility with Nikon Lenses:\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003eThis adapter is compatible with Nikon F mount (DSLR) lenses only. It is not compatible with Nikon mirrorless lenses. NOTICE: G-type Nikkor lenses need to find some way to open the aperture up (for example, by using an orthodontic rubber band to hold the little aperture tab on the lens in the “open” position.)\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch3\u003e\u003cstrong\u003eCompatibility with ZWO Cameras:\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003eThis ZWO adapter allows you to attach a Nikon F-mount lens to select ZWO cameras that have a backfocus of 6.5mm via ZWO's Electronic Filter Wheels (EFW). This includes all cooled (Pro model) cameras that have a 4\/3\" sensor or smaller. It has a female Nikon F-mount bayonet mount on the lens side and a male T\/T2 thread on the other side which connects to the EFW. The EFW, in turn, connects to the ZWO camera.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch3\u003e\u003cstrong\u003eCompatibility with ZWO Filter Wheels:\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/agenaastro.com\/zwo-eight-position-electronic-filter-wheel.html\"\u003eZWO 8-Position Electronic Filter Wheel for 1.25\" or 31mm Filters # EFW8-125\/31\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/agenaastro.com\/zwo-5-position-electronic-filter-wheel-for-1-25-or-31mm-filters-efwmini.html\"\u003eZWO 5-Position Electronic Filter Wheel for 1.25\" or 31mm Filters # EFWMINI\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/agenaastro.com\/zwo-7-position-electronic-filter-wheel-for-36mm-unmounted-filters-version-ii-efw7-36.html\"\u003eZWO 7-Position Electronic Filter Wheel for 36mm Unmounted Filters (Version II) # EFW7-36-II\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003eThis product cannot be used with 2\" EFWs and you will need\u003cspan\u003e \u003c\/span\u003e\u003ca href=\"https:\/\/agenaastro.com\/zwo-nikon-lens-adapter-for-2-electronic-filter-wheel-efw2-nikon.html\"\u003eEFW2-Nikon\u003c\/a\u003e\u003cspan\u003e \u003c\/span\u003eif using a 2\" filter wheel.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch3\u003eHow to Connect the Nikon Lens Short Adapter for ZWO 1.25\"\/31mm\/36mm EFWs\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cimg src=\"https:\/\/astronomy-imaging-camera.com\/wp-content\/uploads\/313.jpg\" alt=\"3\" data-num=\"0\" id=\"#img0\"\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003ePlease Note:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eIt is common for the silver plate on one side of this adapter to have several light scuff marks right out of the box. These items are new as received from ZWO, and these marks are purely cosmetic.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"product info ca_extra_info\"\u003e\n\u003ch4\u003eOther Information\u003c\/h4\u003e\n\u003cdiv class=\"value\"\u003e\n\u003cdiv class=\"product attribute ca_extra_info\"\u003e\n\u003cdiv class=\"value\"\u003e\n\u003cul\u003e\n\u003cli\u003eCountry of Manufacture: China\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"ZWO","offers":[{"title":"Default Title","offer_id":47208357069059,"sku":"U2509-MC-ZWO-NIKON-EFW","price":44.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/3e8add24-a561-4ed9-a8d9-04637e152744.jpg?v=1758141935"},{"product_id":"used-sirius-optics-polarizer-filter-2","title":"Used Sirius Optics Polarizer Filter, 2\"","description":"\u003ch4\u003eWAS $30; NOW JUST \u003cstrong\u003e$20\u003c\/strong\u003e!\u003c\/h4\u003e\n\u003ch4\u003eCondition:\u003c\/h4\u003e\n\u003cp\u003eThis is a used Sirius Optics polarizer filter. This is 2\" in diameter and has 48mm thread size. This is in excellent condition with clean optics and little signs of use. It includes the jewel case but does not come with a box. \u003c\/p\u003e","brand":"Sirius Optics","offers":[{"title":"Default Title","offer_id":47296008323331,"sku":"U2509-DS-SOPOLAR","price":20.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/7839EDC6-E108-4C6C-AFC7-10FEB0DD448A.png?v=1759442487"},{"product_id":"used-hutech-idas-nebula-booster-nbz-48mm-filter-4","title":"Used Hutech IDAS Nebula Booster NBZ 48mm Filter, 2\"","description":"\u003ch4\u003eWAS $150; NOW JUST \u003cspan style=\"text-decoration: underline;\"\u003e$75\u003c\/span\u003e!\u003c\/h4\u003e\n\u003ch4\u003eCondition:\u003c\/h4\u003e\n\u003cp\u003eThis is a Hutech IDAS Nebula Booster filter in fair condition. The optics have some smudging and dust that we have not been able to remove; see the photos.  You may have better luck.  This includes the jewel case.  We have reduced the price accordingly to account for this condition issue.  \u003c\/p\u003e\n\u003cp\u003e(Any dust you see in the photos is removable - it seems that these filters develop an electrostatic charge such that the dust in the air is just attracted to the filter.)  \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch4\u003eDescription:\u003c\/h4\u003e\n\u003cp\u003e\u003cmeta charset=\"UTF-8\"\u003e\u003cb\u003eThe IDAS Nebula Booster 48mm Filter\u003c\/b\u003e\u003cspan\u003e is designed to enhance the contrast of Ha (Hydrogen Alpha) and OIII (Oxygen II) emission nebula while accommodating the filter spectral shift when used with modern fast optical systems. This dual-band filter is ideal for one-shot color cameras, as well as mono-color astronomical cameras.\u003c\/span\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003ch3\u003eProprietary IDAS Sophisticated Optics Technology\u003c\/h3\u003e\n\u003cp\u003eIon-Gun Assist Deposition (IGAD) coating technology is used by IDAS for these astronomical filters. This results in superior filters with robust coatings and long-term spectral stability, even with temperature and humidity extremes. This stability is especially important for bandpass curves with steep slopes (narrowband filters). This technology helps to virtually eliminate bandpass shifts from the +\/-3 or 4nm typical of standard coating filters.\u003c\/p\u003e\n\u003cp\u003eThe Multi Bandpass Technology (MBT) is used in conjunction with the IGAD hard-coating technology to further elevate IDAS filters. This technology allows IDAS to create very complicated filters for astronomical use.\u003c\/p\u003e\n\u003cp\u003eUltra Fine Polish (UFP) Finishing really sets IDAS filters apart from the competition. They are polished twice as long as is typical for optical glass. In combination with the use of high-quality substrate glass, no scratches, bubbles, or other defects are visible even under microscopic inspection.\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/NBX_in_cone_Ha-part_480x480_png.webp?v=1748555939\" alt=\"\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/NBX_in_cone_OIII-part_480x480_png.webp?v=1748555944\" alt=\"\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eThis filter has ideal flat-top bandpass, as well as in-band transmission. The off-center bandpass accommodates off-axis rays for fast optics (up to f\/2). The steep bandpass edges help to minimize internal reflections. It is able to fully block NIR up to 1200nm.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"heading capitalize\"\u003eSpecifications\u003c\/p\u003e\n\u003cdiv class=\"specs-table\"\u003e\n\u003ctable class=\"specifications\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd class=\"left\"\u003eFilter Shape\u003c\/td\u003e\n\u003ctd class=\"right\"\u003eRound\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"left\"\u003eFilter Size\u003c\/td\u003e\n\u003ctd class=\"right\"\u003e48mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"left\"\u003eFilter Thickness\u003c\/td\u003e\n\u003ctd class=\"right\"\u003e2.5mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e","brand":"Astro-Hutech","offers":[{"title":"Default Title","offer_id":47512351637763,"sku":"U2512-GM-HU-NBZ-48","price":75.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/47fc05b6-aa20-4254-b940-770227e195b9.jpg?v=1764890447"},{"product_id":"used-vaonis-vespera-solar-filter-1","title":"Used Vaonis Vespera Solar Filter","description":"\u003cp\u003eThis is a Vespera solar filter from a trade-in of a Vespera II.  It is in perfect, like new condition, completely clean. \u003cmeta charset=\"utf-8\"\u003e\u003c\/p\u003e\n\u003cp\u003eYou save big!  \u003c\/p\u003e\n\u003cp\u003eIt does not have a jewel case or box.  \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e   \u003c\/p\u003e\n\u003cp\u003e\u003cspan style=\"font-family: -apple-system, BlinkMacSystemFont, 'San Francisco', 'Segoe UI', Roboto, 'Helvetica Neue', sans-serif; font-size: 0.875rem;\"\u003e  \u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan style=\"font-family: -apple-system, BlinkMacSystemFont, 'San Francisco', 'Segoe UI', Roboto, 'Helvetica Neue', sans-serif; font-size: 0.875rem;\"\u003e   \u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan style=\"font-family: -apple-system, BlinkMacSystemFont, 'San Francisco', 'Segoe UI', Roboto, 'Helvetica Neue', sans-serif; font-size: 0.875rem;\"\u003eAstronomer by night, astronomer by day!\u003c\/span\u003e\u003cspan style=\"font-family: -apple-system, BlinkMacSystemFont, 'San Francisco', 'Segoe UI', Roboto, 'Helvetica Neue', sans-serif; font-size: 0.875rem;\"\u003e \u003c\/span\u003e\u003cstrong style=\"font-family: -apple-system, BlinkMacSystemFont, 'San Francisco', 'Segoe UI', Roboto, 'Helvetica Neue', sans-serif; font-size: 0.875rem;\"\u003eObserve the closest star to Earth during the day\u003c\/strong\u003e\u003cspan style=\"font-family: -apple-system, BlinkMacSystemFont, 'San Francisco', 'Segoe UI', Roboto, 'Helvetica Neue', sans-serif; font-size: 0.875rem;\"\u003e \u003c\/span\u003e\u003cspan style=\"font-family: -apple-system, BlinkMacSystemFont, 'San Francisco', 'Segoe UI', Roboto, 'Helvetica Neue', sans-serif; font-size: 0.875rem;\"\u003ewith the Vespera solar filter. The filter allows you to observe\u003c\/span\u003e\u003cspan style=\"font-family: -apple-system, BlinkMacSystemFont, 'San Francisco', 'Segoe UI', Roboto, 'Helvetica Neue', sans-serif; font-size: 0.875rem;\"\u003e \u003c\/span\u003e\u003cstrong style=\"font-family: -apple-system, BlinkMacSystemFont, 'San Francisco', 'Segoe UI', Roboto, 'Helvetica Neue', sans-serif; font-size: 0.875rem;\"\u003esunspots\u003c\/strong\u003e\u003cspan style=\"font-family: -apple-system, BlinkMacSystemFont, 'San Francisco', 'Segoe UI', Roboto, 'Helvetica Neue', sans-serif; font-size: 0.875rem;\"\u003e \u003c\/span\u003e\u003cspan style=\"font-family: -apple-system, BlinkMacSystemFont, 'San Francisco', 'Segoe UI', Roboto, 'Helvetica Neue', sans-serif; font-size: 0.875rem;\"\u003e(dark spots) that show the intensity of the Sun’s activity.\u003c\/span\u003e\u003cbr\u003e\u003cstrong\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eSolar Mode\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eallows you to observe the Sun in almost real-time using the live display. Capture photos at any time from the Observation tab of the Singularity mobile app.\u003c\/p\u003e\n\u003cp\u003eTake several shots at different times of the day, week or month and compare your photos. Witness how the\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eSun’s activity\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003echanges with the appearance or disappearance of sunspots. These can have a life span of several days, more rarely several weeks.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003eAstronomer by night, astronomer by day! Observe the closest star to Earth during the day with the Vespera solar filter. The filter allows you to observe sunspots (dark spots) that show the intensity of the Sun’s activity.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003ePhotograph the Sun with Vespera\u003cbr\u003e\u003c\/strong\u003eThe\u003cspan\u003e \u003c\/span\u003e\u003cem\u003eSolar Pointing\u003c\/em\u003e\u003cspan\u003e \u003c\/span\u003emode allows you to observe the Sun in almost real-time using the live display*. Capture photos at any time from the Observation tab of the Singularity mobile app.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cblockquote\u003e\u003c\/blockquote\u003e\n\u003cdiv\u003e\n\u003ch4\u003e\u003cstrong\u003eWarnings\u003c\/strong\u003e\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003eYour Vespera station should never be pointed towards the sun unless a solar filter is installed.\u003c\/li\u003e\n\u003cli\u003eYou can only use Vespera to observe the sun using the\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003e\u003cem\u003eSolar Pointing\u003c\/em\u003e\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003efeature of the Singularity app and the solar filter specially designed by Vaonis. The use of any other means to observe the Sun (pointing by coordinates, pointing by hand, use of any other filter, etc.) would void your warranty in the event of damage to your equipment. (see Warranties below).\u003c\/li\u003e\n\u003cli\u003eNever look directly at the sun without adequate protection. Direct observation of the sun without protection and without a solar filter, even for a short time, can lead to serious eye burns and potential loss of vision or even blindness.\u003c\/li\u003e\n\u003cli\u003eDo not attempt to open the lens ring that contains the filter (see Warranty below).\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003cp\u003e \u003c\/p\u003e","brand":"Vaonis","offers":[{"title":"Default Title","offer_id":47774575952131,"sku":"U2602-MH-AC021","price":119.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/ab0cf946-0996-474c-acee-03d3c765e6aa.jpg?v=1771635003"},{"product_id":"used-celestron-oxygen-iii-narrowband-filter-2","title":"Used Celestron Oxygen III Narrowband Filter - 2\"","description":"\u003cdiv\u003eThis is a 2\" Celestron O-III filter in excellent, clean condition.  Comes in its original jewel box.  \u003c\/div\u003e\n\u003cdiv\u003e    \u003c\/div\u003e\n\u003cdiv\u003e    \u003c\/div\u003e\n\u003cdiv\u003e\u003c\/div\u003e\n\u003cdiv\u003e    \u003c\/div\u003e\n\u003cul\u003e\n\u003cli\u003eThe 2\" OIII narrowband filter isolates the two doubly-ionized oxygen lines (496 and 501 nm lines)\u003c\/li\u003e\n\u003cli\u003eFilter has ultra-hard, vacuum-deposited coating\u003c\/li\u003e\n\u003cli\u003eEliminates un-natural colored halos surrounding bright stars\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eThe 2\" OIII narrowband filter isolates just the two doubly-ionized oxygen lines (496 and 501 nm lines) emitted by planetary and emission nebulae, while blocking the rest of the overall spectrum of light. The result is extreme contrast between the black sky background and the faint photons of OIII light needed for detailed views of the Veil, Ring, Dumbbell, Crescent and Orion nebulae, among other objects.\u003c\/p\u003e\n\u003cp\u003eEach filter has an ultra hard, vacuum-deposited coating carefully designed to block all of the visual spectrum ranging from 400 to 700 nm This eliminates the un-natural colored halos surrounding bright stars common with O III filters of less sophisticated coating technology.\u003c\/p\u003e","brand":"Celestron","offers":[{"title":"Default Title","offer_id":47967137530115,"sku":"U2603-SZ-93624","price":75.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/38c9062d-8f57-4063-9304-c00fd87e8d30.jpg?v=1776817227"},{"product_id":"used-idas-lps-p2-52mm-filter-mbt-igad","title":"Used IDAS LPS-P2 52mm filter (MBT \u0026 IGAD)","description":"\u003cp\u003e\u003cstrong\u003eCondition\u003c\/strong\u003e: This is a used IDAS light pollution suppression filter in great condition. The optics are clean and it comes in its jewel case. \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eDescription\u003c\/strong\u003e:\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eLight pollution suppression (LPS) filters are designed to suppress the common emission lines generated by artificial lighting, yet allow the important nebula emission lines to pass, thus enhancing the contrast of astronomical objects, particularly emission nebulae.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eUnlike other light pollution suppression filters, IDAS filters are specifically designed for balanced color transmission using the IDAS unique \u003cb\u003eMulti-Bandpass Technology\u003c\/b\u003e (MBT) process. The balanced transmission allows color photographs to be taken with minimal color cast to broadband emission objects such as stars, galaxies and globular clusters. The comparison photos at right demonstrate (qualitatively) that the IDAS filter maintains better color balance than other filters which have been designed for visual use.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eLPS filters utilize the unique IDAS Ion Gun Assisted Deposition (IGAD*) coating technology for superior coating durability (quartz hardness) and safer cleaning. IGAD coatings also improve temperature and humidity stability of the filter performance, reducing spectrum shifts down to +\/-1nm from the +\/-3 or 4nm shift of standard coatings.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eCCD imaging can also benefit, because although CCD imagers can already shoot through light pollution to some extent, including an LPS filter to the setup gives an added (signal-to-noise) edge.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eNote, however, that light pollution suppression filters are \u003c\/span\u003e\u003cspan\u003enot\u003c\/span\u003e\u003cspan\u003e a perfect substitute for dark skies.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eLPS filters are available for 1-1\/4\" and 2\" (48mm) eyepieces, as well as in numerous sizes to accomodate most popular camera lenses. Each filter lot is tested and a plot of the spectral response of the lot is provided with each filter. \u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0869\/6486\/files\/tokai1_large.gif?10873360616383643319\" alt=\"\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e[Above] Spectral response (% transmission vs. wavelength in nanometers) of the IDAS Light Pollution Suppression filter. Major emission lines generated by artificial lighting are also indicated. Note that this plot represents the spec target for LPS filters. The spectral response of each individual filter will vary. This is measured, plotted, and shipped with each filter produced:\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0869\/6486\/files\/idas-p2_1024x1024.gif?7115251255644343845\" alt=\"\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eAbove is a sample of the filter lot data plot which is shipped with each filter.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eThe IDAS production criteria for filters are as follows, arranged from left to right (short to long wavelength) as plotted above:\u003c\/span\u003e\u003c\/p\u003e\n\u003cdiv class=\"scrollable-wrapper\"\u003e\n\u003ctable\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003e\u003cspan size=\"2\" face=\"Arial, Geneva\"\u003eWavelength (nm)\u003c\/span\u003e\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003e\u003cspan size=\"2\" face=\"Arial, Geneva\"\u003e\u003cspan\u003ePass\/Block\u003c\/span\u003e\u003c\/span\u003e\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003e\u003cspan size=\"2\" face=\"Arial, Geneva\"\u003e\u003cspan\u003eTransmission\u003c\/span\u003e\u003c\/span\u003e\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan size=\"2\" face=\"Arial, Geneva\"\u003e365\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan size=\"2\" face=\"Arial, Geneva\"\u003eBlock\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan size=\"2\" face=\"Arial, Geneva\"\u003e6.5% max\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan size=\"2\" face=\"Arial, Geneva\"\u003e405\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan size=\"2\" face=\"Arial, Geneva\"\u003eBlock\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan size=\"2\" face=\"Arial, Geneva\"\u003e6.5% max\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan size=\"2\" face=\"Arial, Geneva\"\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan size=\"2\" face=\"Arial, Geneva\"\u003ePass\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan size=\"2\" face=\"Arial, Geneva\"\u003e60% min (avg)\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan size=\"2\" face=\"Arial, Geneva\"\u003e436\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan size=\"2\" face=\"Arial, Geneva\"\u003eBlock\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan size=\"2\" face=\"Arial, Geneva\"\u003e6.5% max\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan size=\"2\" face=\"Arial, Geneva\"\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan size=\"2\" face=\"Arial, Geneva\"\u003ePass\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan size=\"2\" face=\"Arial, Geneva\"\u003e92% min (avg)\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan size=\"2\" face=\"Arial, Geneva\"\u003e546\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan size=\"2\" face=\"Arial, Geneva\"\u003eBlock\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan size=\"2\" face=\"Arial, Geneva\"\u003e6.5% max\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan size=\"2\" face=\"Arial, Geneva\"\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan size=\"2\" face=\"Arial, Geneva\"\u003ePass\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan size=\"2\" face=\"Arial, Geneva\"\u003e75% min (avg)\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan size=\"2\" face=\"Arial, Geneva\"\u003e590\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan size=\"2\" face=\"Arial, Geneva\"\u003eBlock\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan size=\"2\" face=\"Arial, Geneva\"\u003e6.5% max\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan size=\"2\" face=\"Arial, Geneva\"\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan size=\"2\" face=\"Arial, Geneva\"\u003ePass\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan size=\"2\" face=\"Arial, Geneva\"\u003e75% min (avg)\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan size=\"2\" face=\"Arial, Geneva\"\u003e623\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan size=\"2\" face=\"Arial, Geneva\"\u003eBlock\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan size=\"2\" face=\"Arial, Geneva\"\u003e25% max\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan size=\"2\" face=\"Arial, Geneva\"\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan size=\"2\" face=\"Arial, Geneva\"\u003ePass\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan size=\"2\" face=\"Arial, Geneva\"\u003e80% min (avg)\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cp\u003e\u003cspan\u003e \u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0869\/6486\/files\/tokai2_large.gif?10873360616383643319\" alt=\"\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e[Above] Off-axis spectral response (% transmission vs. wavelength in nanometers) of the IDAS filter.\u003c\/span\u003e\u003c\/p\u003e","brand":"Astro-Hutech","offers":[{"title":"Default Title","offer_id":47967443681539,"sku":"U2603-SZ-LPS-P2","price":90.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/d3366c3f-a229-4ad7-9871-6ff63a6c0280.jpg?v=1776817997"},{"product_id":"used-astronomik-cls-ccd-full-frame-clip-filter-for-canon-eos","title":"Used Astronomik CLS CCD Full-Frame Clip Filter for Canon EOS","description":"\u003cp\u003eThis is an Astronomik CLS CCD full-frame clip filter for a Canon EOS camera.  It is in excellent condition:  the optics are clean and the body is unmarked.  See the photos.  \u003c\/p\u003e\n\u003cp\u003e\u003cspan style=\"font-family: -apple-system, BlinkMacSystemFont, 'San Francisco', 'Segoe UI', Roboto, 'Helvetica Neue', sans-serif; font-size: 0.875rem;\"\u003e\u003cspan\u003eThis comes in its original jewel box.  This is a bargain at \u003cstrong\u003ehalf-off\u003c\/strong\u003e and won't last!  \u003c\/span\u003e\u003c\/span\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eAny dust you see in the photos is easily removable - it seems that these filters develop an electrostatic charge such that the dust in the air is just attracted to the filter.  \u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan style=\"font-family: -apple-system, BlinkMacSystemFont, 'San Francisco', 'Segoe UI', Roboto, 'Helvetica Neue', sans-serif; font-size: 0.875rem;\"\u003e\u003cspan\u003e \u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cbr\u003e\u003cmeta charset=\"utf-8\"\u003e\u003c\/p\u003e\n\u003ch3 class=\"heading product-view__title\" data-ui-id=\"page-title-wrapper\"\u003eAstronomik CLS Canon EOS Clip Filter\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cmeta charset=\"utf-8\"\u003e\n\u003cul\u003e\n\u003cli\u003eThis CLS Clip Filter features a Canon EOS Clip format designed for standard Canon EOS cameras which include an IR blocking filter over their detector\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul\u003e\n\u003cli\u003eThe Astronomik CLS Clip Filter has transmission characteristics identical to the CLS Filter, and works with most Canon EOS Cameras (250D, 300D, 350D, 400D, 20D, 20Da, 30D, 40D)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul\u003e\n\u003cli\u003eAll normal functions of your Canon EOS camera will be unaffected by attaching this filter, including focus, image stabilization, etc.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul\u003e\n\u003cli\u003eThis filter has been developed to block out as much artificial light as possible while, at the same time, enabling the best performance for useful wavelengths\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul\u003e\n\u003cli\u003eThe Astronomik CLS Filter is an excellent filter for imaging deep-sky-objects with telescopes or photo lenses of all apertures, working at f\/3 and above\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul\u003e\n\u003cli\u003eBlocks the light of mercury and sodium-vapor lamps spectral lines, making it a terrific light pollution filter\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul\u003e\n\u003cli\u003eMade in Germany, a country known for designing optics of high quality!\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eMore About the Astronomik CLS Canon EOS Clip Filter\u003c\/h3\u003e\n\u003cp\u003eFor astronomical use under light-polluted conditions, the Astronomik CLS Filter is suitable for use with standard Canon EOS DSLR Cameras. The CLS Filter further brings out the contrast between your target object and the background. Since this filter has a wider transmission curve when compared with UHC filters, the CLS will transmit more light. Stars will appear sharper. The Astronomik CLS Filter has been enhanced to simultaneously obstruct as much artifical light as possible while providing the finest performance for preferred wavelengths. This filter will not block long-wavelength Infrared light.\u003c\/p\u003e\n\u003cp\u003eBy blocking the spectral lines of mercury and sodium-vapor lamps, but letting a large percentage of the visible light and H-alpha emissions pass, the CLS filter will effectively block out most surrounding light pollution, which can spoil your images. The filters are optimized for use with lenses with all apertures, working at f\/3 and above.\u003c\/p\u003e\n\u003cp\u003eThe Astronomik EOS-Clip model filter enables astrophotography with DSLR cameras despite severe light-polluting conditions without white balance shift. All Astronomik filters are parfocal with all other Astronomik filters. Does not reduce optical effectiveness. This filter offers high resistance to scratches and the effects of aging, as well as high humidity. Astronomik filters come with a high-quality, durable, plastic storage case.\u003c\/p\u003e\n\u003ch3\u003eAstronomik EOS Clip Filter System\u003c\/h3\u003e\n\u003cp\u003eAstronomik's patented Clip Filter has been assembled from black anodized aluminum and laser-cut on the most advanced modern machines. Within seconds, it can be placed straight into the EOS camera body. No changes required and all lens functions (focus, screen, image stabilization) remain operational! Nearly all Canon system lenses (save for the EF-S series) and all M42 and T2 lens adapters, work with the Astronomik Clip-Filter. This system also serves as an excellent dust protector, preventing it from gathering on the sensor during long exposures.\u003c\/p\u003e\n\u003ch3\u003eTransmission Specifications:\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e92% transmission at 486 nm (H-beta)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul\u003e\n\u003cli\u003e92% transmission at 496 nm (OIII)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul\u003e\n\u003cli\u003e92% transmission at 501 nm (OIII)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul\u003e\n\u003cli\u003e97% transmission at 656 nm (H alpha)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul\u003e\n\u003cli\u003ePasses wavelengths from 450 nm to 540 nm and from 640 nm and above\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul\u003e\n\u003cli\u003ePasses Infrared wavelengths\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eList of Compatible Canon EOS Cameras\u003c\/h3\u003e\n\u003ccenter\u003e\n\u003ctable\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth\u003e\u003ccenter\u003e\u003cstrong\u003eCanon EOS\u003c\/strong\u003e\u003c\/center\u003e\u003c\/th\u003e\n\u003cth\u003e\u003ccenter\u003e\u003cstrong\u003e Suitable for Clip-Filter? \u003c\/strong\u003e\u003c\/center\u003e\u003c\/th\u003e\n\u003cth\u003e\u003ccenter\u003e\u003cstrong\u003e LiveView? \u003c\/strong\u003e\u003c\/center\u003e\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003ccenter\u003e7D MkII\u003c\/center\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003ccenter\u003eYes\u003c\/center\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003ccenter\u003eYes\u003c\/center\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003ccenter\u003e7D\u003c\/center\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003ccenter\u003eYes\u003c\/center\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003ccenter\u003eYes\u003c\/center\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003ccenter\u003e20D\u003c\/center\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003ccenter\u003eYes\u003c\/center\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003ccenter\u003eNo\u003c\/center\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003ccenter\u003e20Da\u003c\/center\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003ccenter\u003eYes\u003c\/center\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003ccenter\u003eYes\u003c\/center\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003ccenter\u003e30D\u003c\/center\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003ccenter\u003eYes\u003c\/center\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003ccenter\u003eNo\u003c\/center\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003ccenter\u003e40D\u003c\/center\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003ccenter\u003eYes\u003c\/center\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003ccenter\u003eYes\u003c\/center\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003ccenter\u003e50D\u003c\/center\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003ccenter\u003eYes\u003c\/center\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003ccenter\u003eYes\u003c\/center\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003ccenter\u003e60D + 60Da\u003c\/center\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003ccenter\u003eYes\u003c\/center\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003ccenter\u003eYes\u003c\/center\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003ccenter\u003e70D\u003c\/center\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003ccenter\u003eYes\u003c\/center\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003ccenter\u003eYes\u003c\/center\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003ccenter\u003e77D\u003c\/center\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003ccenter\u003eYes\u003c\/center\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003ccenter\u003eYes\u003c\/center\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003ccenter\u003e80D\u003c\/center\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003ccenter\u003eYes\u003c\/center\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003ccenter\u003eYes\u003c\/center\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003ccenter\u003e90D\u003c\/center\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003ccenter\u003eYes\u003c\/center\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003ccenter\u003eYes\u003c\/center\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003ccenter\u003e300D \/ Digital Rebel \/ Kiss Digital\u003c\/center\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003ccenter\u003eYes\u003c\/center\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003ccenter\u003eNo\u003c\/center\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003ccenter\u003e 350D \/ Digital Rebel XT \/ Kiss Digital N \u003c\/center\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003ccenter\u003eYes\u003c\/center\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003ccenter\u003eNo\u003c\/center\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003ccenter\u003e 400D \/ Digital Rebel XTi \/ Kiss Digital X \u003c\/center\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003ccenter\u003eYes\u003c\/center\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003ccenter\u003eNo\u003c\/center\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003ccenter\u003e450D \/ Rebel XSi \/ Kiss X2\u003c\/center\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003ccenter\u003eYes\u003c\/center\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003ccenter\u003eYes\u003c\/center\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003ccenter\u003e500D \/ Rebel T1i \/ Kiss X3\u003c\/center\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003ccenter\u003eYes\u003c\/center\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003ccenter\u003eYes\u003c\/center\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003ccenter\u003e550D \/ Rebel T2i \/ Kiss X4\u003c\/center\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003ccenter\u003eYes\u003c\/center\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003ccenter\u003eYes\u003c\/center\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003ccenter\u003e600D \/ Rebel T3i \/ Kiss X5\u003c\/center\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003ccenter\u003eYes\u003c\/center\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003ccenter\u003eYes\u003c\/center\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003ccenter\u003e650D \/ Rebel T4i \/ Kiss X6\u003c\/center\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003ccenter\u003eYes\u003c\/center\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003ccenter\u003eYes\u003c\/center\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003ccenter\u003e700D \/ Rebel T5i \/ Kiss X7\u003c\/center\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003ccenter\u003eYes\u003c\/center\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003ccenter\u003eYes\u003c\/center\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003ccenter\u003e750D \/ Rebel T6i \/ Kiss X8\u003c\/center\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003ccenter\u003eYes\u003c\/center\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003ccenter\u003eYes\u003c\/center\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003ccenter\u003e760D \/ Rebel T7i \/ Kiss X9\u003c\/center\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003ccenter\u003eYes\u003c\/center\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003ccenter\u003eYes\u003c\/center\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003ccenter\u003e1000D \/ Rebel XS \/ Kiss F\u003c\/center\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003ccenter\u003eYes\u003c\/center\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003ccenter\u003eYes\u003c\/center\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003ccenter\u003e1100D \/ Rebel T3 \/ Kiss X50\u003c\/center\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003ccenter\u003eYes\u003c\/center\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003ccenter\u003eYes\u003c\/center\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003ccenter\u003e1200D\u003c\/center\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003ccenter\u003eYes\u003c\/center\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003ccenter\u003eYes\u003c\/center\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003ccenter\u003e1300D\u003c\/center\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003ccenter\u003eYes\u003c\/center\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003ccenter\u003eYes\u003c\/center\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003ccenter\u003e2000D\u003c\/center\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003ccenter\u003eYes\u003c\/center\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003ccenter\u003eYes\u003c\/center\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003ccenter\u003e100D\u003c\/center\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003ccenter\u003eYes\u003c\/center\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003ccenter\u003eYes\u003c\/center\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003ccenter\u003e200D\u003c\/center\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003ccenter\u003eYes\u003c\/center\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003ccenter\u003eYes\u003c\/center\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003ccenter\u003e250D\u003c\/center\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003ccenter\u003eYes\u003c\/center\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003ccenter\u003eYes\u003c\/center\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/center\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Astronomik","offers":[{"title":"Default Title","offer_id":47977960210691,"sku":"U2603-SZ-AN-CLSCANON","price":75.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/73bf106b-e01d-4db3-8373-68c335bdef4a.jpg?v=1776878853"},{"product_id":"used-fli-ml1102m-2-monochrome-camera-w-cfw-2-7-filter-wheel-lrgbsho-filters","title":"Used FLI ML1102M-2 Monochrome 11MP camera w\/CFW 2-7 Filter wheel + LRGBSHO filters","description":"\u003ch2\u003eHUGE PRICE DROP!  Was $2500.  Now just \u003cspan style=\"text-decoration: underline;\"\u003e$1000!\u003c\/span\u003e\n\u003c\/h2\u003e\n\u003cp\u003eThis is a 15-year-old Finger Lakes DSO camera.  \u003cmeta charset=\"utf-8\"\u003eIt was way ahead of its time back then, and still packs a wallop of a punch:  11 megapixels of CCD goodness, 9 micron pixel size, and up to 55 degrees Celsius of active cooling!  The complete specs are below.  \u003c\/p\u003e\n\u003cp\u003eIt is in excellent shape, clean both inside and out.  It's an oldie but a goodie.  \u003c\/p\u003e\n\u003cp\u003eThis includes the CFW 2-inch 7-position filter wheel, which already has a complete set of LRGBSHO filters installed.  Unfortunately, the filters are not marked, so we don't have any additional information on the branding, bandpass width, etc.  \u003c\/p\u003e\n\u003cp\u003eThis also includes both of the original manuals for the camera and filter wheel, and all the power and connection cords.  The camera and filter each come in their own nice Pelican cases.  \u003c\/p\u003e\n\u003cp\u003ePlease call with any questions about this setup.  \u003cmeta charset=\"utf-8\"\u003eThere are no returns on this item. \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch4\u003eSpecifications\u003c\/h4\u003e\n\u003cp\u003e\u003cmeta charset=\"utf-8\"\u003eEach component of the MicroLine camera is designed and manufactured for a long life in the most demanding conditions. MicroLine download speeds are fast yet maintain the 16-bit resolution necessary to produce high quality images.\u003c\/p\u003e\n\u003cp\u003e\u003cmeta charset=\"utf-8\"\u003eSensor Type Interline\u003c\/p\u003e\n\u003cp\u003eTransfer CCD\u003c\/p\u003e\n\u003cp\u003eActive Pixels 4008 x 2672\u003c\/p\u003e\n\u003cp\u003ePixel Size (microns) 9 x 9 µm\u003c\/p\u003e\n\u003cp\u003eImaging Area (Diagonal) 36.1 X 24 mm (43.4 mm)\u003c\/p\u003e\n\u003cp\u003eFull Well Capacity (e-) 60,000 electrons\u003c\/p\u003e\n\u003cp\u003eCooling Method Air (Optional liquid) 0.004 eps at -35C\u003c\/p\u003e\n\u003cp\u003eInterface USB 2.0 \u003c\/p\u003e\n\u003cp\u003eDynamic Rang \u003cmeta charset=\"utf-8\"\u003e76.2 dB\u003c\/p\u003e\n\u003cp\u003eLens Mount Optional Nikon F-mount or Canon EOS\u003c\/p\u003e\n\u003cp\u003e\u003cmeta charset=\"utf-8\"\u003eAnti-Blooming 1000X\u003c\/p\u003e\n\u003cp\u003eTechnical Data Sensor ON Semi KAI-11002\u003c\/p\u003e\n\u003cp\u003eMax. Cooling (Air) 55°C below ambient\u003c\/p\u003e\n\u003cp\u003eShutter Optional 65 mm\u003c\/p\u003e\n\u003cp\u003eDark Current (typical) \u003cmeta charset=\"utf-8\"\u003e0.004 eps at -35C\u003c\/p\u003e\n\u003cp\u003eDigitization Clock 2 MHz and 12 MHz\u003c\/p\u003e\n\u003cp\u003eTypical_Readout Noise 9 e- at 2 MHz; 14 e- at 12 MHz\u003c\/p\u003e\n\u003cp\u003e\u003cmeta charset=\"utf-8\"\u003eWeight 3.96 lbs (1.8 kg)\u003c\/p\u003e\n\u003cp\u003eEnvironment -30°C to 45°C | 10% - 90% Relative Humidity\u003c\/p\u003e\n\u003cp\u003e12V (100-240V AC to 12V DC power supply included). With TEC off: \u0026lt;1A. TEC at 100%: 4.4A. Shutter open: 4A pulse for 100msec. Shutter held open, add 0.22A. Power\u003c\/p\u003e","brand":"Finger Lakes","offers":[{"title":"Default Title","offer_id":47979373461763,"sku":"U2604-SB-FLI","price":1000.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/abed0f94-fcdc-4d0d-8108-f86bf5b6acfc.jpg?v=1776968132"},{"product_id":"used-sbig-st2000xm-w-cfw-8a-filter-wheel","title":"Used SBIG ST2000XM w\/CFW-8A Filter Wheel","description":"\u003ch2\u003eHUGE PRICE DROP!  Was $350.  Now just \u003cspan style=\"text-decoration: underline;\"\u003e$175!\u003c\/span\u003e  \u003c\/h2\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003eThis is an unusual item - this is an SBIG ST-2000XM cooled camera with a built-in filter wheel, the CFW-8A, which is for 1.25\" filters.  The camera is about 15-20 years old, but is in good shape.  It has a 2MP sensor and 7.4 micron pixel size - the complete specs are below.  It actually has two sensors:  one for imaging, and the other for guiding:  it is a self-guiding camera. \u003c\/p\u003e\n\u003cp\u003eThis comes with the appropriate cables and power supply.  It comes in a great Pelican 1520 case, with foam - a $200 value all by itself.  So, you can think of this as getting a well-proven and time-tested camera for just $150. \u003c\/p\u003e\n\u003cp\u003eThere are no returns on this item. \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cspan style=\"font-family: Times New Roman; font-size: large;\"\u003eThe\u003cspan\u003e \u003c\/span\u003e\u003cem\u003e\u003cstrong\u003eST-2000XM and ST-2000XMI\u003c\/strong\u003e\u003c\/em\u003e\u003cspan\u003e \u003c\/span\u003ecameras are the same, except that the ST-2000XMI does not include the built-in TC-237H tracking CCD and some of the accessories that are included with the ST-2000XM (see the comparison table below).  In March of 2006 we also added the\u003cspan\u003e \u003c\/span\u003e\u003ca href=\"http:\/\/www.company7.com\/library\/sbig\/sbwhtmls\/stremoteup.htm\"\u003eRemote Guide Head Port\u003cspan\u003e \u003c\/span\u003e\u003c\/a\u003eto both the single sensor ST-2000XMI and dual sensor ST-2000XM cameras.  Both versions use the same high quality interline CCD from Kodak, the KODAK DIGITAL SCIENCE™ KAI-2020M Image Sensor Megapixel Progressive Scan Interline CCD.  The KODAK DIGITAL SCIENCE\u003csup\u003eTM\u003c\/sup\u003e\u003cspan\u003e \u003c\/span\u003eKAI-2020M is a high-performance multi-megapixel image sensor designed for a wide range of scientific, medical imaging, and machine vision applications. The 7.4 mm square pixels with microlenses provide high sensitivity and the large full well capacity results in high dynamic range. The vertical overflow drain structure provides antiblooming protection, and enables electronic shuttering for precise exposure control to 0.001 seconds.  Other features include low dark current, negligible lag and low smear.  The KAI-2020M CCD is a 2 megapixel progressive scan detector with an active image area of 1.92 million pixels.   The active image area is 1600 x 1200 pixels.  This array is 75% larger than the Sony CCD used in competitors' \"megapixel\" cameras, nearly as large as an\u003cspan\u003e \u003c\/span\u003e\u003ca href=\"http:\/\/www.company7.com\/library\/sbig\/sbwhtmls\/ST8XME.htm\"\u003eST-8XME\u003c\/a\u003e, and the ST-2000XM is a self-guiding camera, utilizing SBIG's patented dual sensor design. \u003cspan\u003e \u003c\/span\u003e\u003c\/span\u003e\u003cspan style=\"font-family: Times New Roman;\"\u003e\u003cspan style=\"font-size: large;\"\u003eAlthough the imaging CCD is nearly the same size as the KAF-1603ME\u003c\/span\u003e\u003cbig\u003e\u003cspan\u003e \u003c\/span\u003eused in the ST-8XME, due to the smaller pixel size it contains nearly half a million more pixels than the ST-8XME. \u003c\/big\u003e\u003c\/span\u003e\u003cspan style=\"font-family: Times New Roman; font-size: large;\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cdiv align=\"left\"\u003e\n\u003ctable align=\"left\" cellspacing=\"1\" border=\"1\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cimg height=\"206\" width=\"253\" alt=\"image002.jpg (7152 bytes)\" src=\"http:\/\/www.company7.com\/library\/sbig\/sbwgifs\/image002.jpg\"\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd bgcolor=\"#800000\"\u003e\n\u003cp align=\"center\"\u003e\u003cspan style=\"color: #ffffff; font-family: Times New Roman;\"\u003e\u003cstrong\u003eKAI-2020M 2 Megapixel CCD\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cp\u003e\u003cspan style=\"font-family: Times New Roman; font-size: large;\"\u003eThe latest KAI-2020M 2 megapixel CCD retains the improved QE of the KAI-2001M and adds a high gain output amplifier that reduces the\u003cspan\u003e \u003c\/span\u003e\u003ca href=\"http:\/\/www.company7.com\/library\/sbig\/sbwhtmls\/st2000xm_new.htm#Improved%20Read%20Noise%20and%20Dark%20Current\"\u003eread noise\u003c\/a\u003e\u003cspan\u003e \u003c\/span\u003eby almost half compared to the previous CCD.  In addition to lower read noise, the\u003cspan\u003e \u003c\/span\u003e\u003ca href=\"http:\/\/www.company7.com\/library\/sbig\/sbwhtmls\/st2000xm_new.htm#Improved%20(Reduced)%20Bright%20Points\"\u003ebright points\u003cspan\u003e \u003c\/span\u003e\u003c\/a\u003ehave been reduced by a factor of ~10X and our tests show the typical\u003cspan\u003e \u003c\/span\u003e\u003ca href=\"http:\/\/www.company7.com\/library\/sbig\/sbwhtmls\/st2000xm_new.htm#Improved%20Read%20Noise%20and%20Dark%20Current\"\u003edark current\u003c\/a\u003e\u003cspan\u003e \u003c\/span\u003eis also reduced by approximately 2Xcompared to the previous versions of the CCD.  These same improvements are also found in the single shot color version of the CCD used in the\u003cspan\u003e \u003c\/span\u003e\u003ca href=\"http:\/\/www.company7.com\/library\/sbig\/sbwhtmls\/st2000xcm_new.htm\"\u003eST-2000XCM color camera\u003c\/a\u003e\u003cspan\u003e \u003c\/span\u003eas of July, 2004 (All ST-2000 monochrome and color cameras beginning with serial number 20407000 or higher).  Previously, Kodak improved the Quantum Efficiency of the 2000 series CCD when it upgraded the KAI-2000M to the KAI-2001M.  This higher \u003cspan\u003e \u003c\/span\u003e\u003ca href=\"http:\/\/www.company7.com\/library\/sbig\/sbwhtmls\/st2000xm_new.htm#Improved%20Quantum%20Efficiency\"\u003e\u003cspan style=\"color: #800000;\"\u003ehigher QE\u003c\/span\u003e\u003c\/a\u003e\u003cspan\u003e \u003c\/span\u003eis retained in the new KAI-2020M, with approximately 25% to 40% higher QE (10% to 15% absolute) across the visible spectrum than the former KAI-2000M.  Also, In August, 2003, we switched to the larger\u003cspan\u003e \u003c\/span\u003e\u003ca href=\"http:\/\/www.company7.com\/library\/sbig\/sbwhtmls\/st2000xm_new.htm#Improved%20Autoguiding\"\u003e\u003cspan style=\"color: #800000;\"\u003eTC-237H built-in guiding CCD\u003c\/span\u003e\u003c\/a\u003e\u003cspan\u003e \u003c\/span\u003einstead of the TC-211.  This improvement was the same as the upgraded autoguider installed on the larger ST-8XE, ST-9XE and ST-10XE cameras. \u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan style=\"font-family: Times New Roman; font-size: large;\"\u003eIn May of 2004 SBIG began including a custom\u003cspan\u003e \u003c\/span\u003e\u003ca href=\"http:\/\/www.company7.com\/library\/sbig\/sbwhtmls\/st2000xm_new.htm#Deluxe%20Carrying%20and%20Storage%20Case\"\u003ePelican carrying and storage case\u003c\/a\u003e\u003cspan\u003e \u003c\/span\u003ewith the ST-2000XM and ST-2000XCM models.  This case is dustproof, waterproof and crushproof and carries a lifetime guarantee from Pelican.  As of the date of this announcement, we are also upgrading the version of\u003cspan\u003e \u003c\/span\u003e\u003ca href=\"http:\/\/www.company7.com\/library\/sbig\/sbwhtmls\/st2000xm_new.htm#TheSky,%20Version%205,%20Level%20II%20from%20Software%20Bisque\"\u003eTheSky\u003c\/a\u003e\u003cspan\u003e \u003c\/span\u003esoftware by Software Bisque that we include with the ST-2000XM camera from version 4 to version 5, a $129 value.  If you have a Macintosh computer running OS-X we will even throw in\u003cspan\u003e \u003c\/span\u003e\u003ca href=\"http:\/\/www.company7.com\/library\/sbig\/sbwhtmls\/st2000xm_new.htm#Equinox%20Planetarium%20Software%20with%20SBIG%20Camera%20Control\"\u003eEquinox\u003c\/a\u003e\u003cspan\u003e \u003c\/span\u003ecamera control and planetarium software for the Mac as well!  A Linux acquisition program is free and other Linux software is also available.  We continue to include CCDSoftV5 in addition to CCDOPS version 5 the most complete package of camera control, image processing, astrometric, star charting and planetarium software available with any new CCD camera from any manufacturer. \u003cspan\u003e \u003c\/span\u003e\u003ca href=\"http:\/\/www.company7.com\/library\/sbig\/sbwhtmls\/st2000xm_new.htm#Upgrades\"\u003eUpgrades\u003c\/a\u003e\u003cspan\u003e \u003c\/span\u003eare available for most of these improvements for older ST-2000XM camera owners.   All of these improvements have come at no additional increase in the price of the ST-2000XM camera since it was introduced.  In fact, the ST-2000XM is priced lower in 2005 than it was in 2004. \u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan style=\"font-family: Times New Roman;\"\u003e\u003cbig\u003eThe full frame download time is approximately 4.5 seconds with our high speed USB electronics.   This camera is also fully compatible with all of our existing accessories such as the CFW8 filter wheel and AO-7 adaptive optics device.  The ST-2000XM has antiblooming protection and the quantum efficiency is comparable to the ABG versions of the enhanced full frame \"E\" detectors used in the former ST-7XE and ST-8XE cameras with a shift in the peak sensitivity toward the blue.  Compared to the ABG versions of the full frame \"E\" series cameras, the ST-2000XM is more sensitive in the blue and green, and slightly less sensitive in the red.  Moreover, because the ST-2000XM has two CCDs (a guiding CCD as well as an imaging CCD) in the same camera head, it is capable of self-guiding without any compromise in the quantum efficiency of the imaging CCD.  In other words, not only CAN it self-guide, it can do so without having to double the exposure time to compensate for the guiding feature.\u003c\/big\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003chr\u003e\n\u003cp\u003e\u003cspan style=\"font-family: Times New Roman;\"\u003e\u003ca name=\"Improved%20Read%20Noise%20and%20Dark%20Current\"\u003e\u003c\/a\u003e\u003cbig\u003e\u003cbig\u003eImproved Read Noise and Dark Current\u003c\/big\u003e\u003c\/big\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003ctable width=\"583\" bgcolor=\"#C0C0C0\" cellpadding=\"6\" cellspacing=\"1\" border=\"1\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd width=\"331\" bgcolor=\"#800000\"\u003e\u003cspan style=\"color: #ffffff; font-family: Arial; font-size: small;\"\u003e\u003cstrong\u003eParameter\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd width=\"108\" bgcolor=\"#800000\" align=\"center\"\u003e\u003cspan style=\"color: #ffffff; font-family: Arial; font-size: small;\"\u003e\u003cstrong\u003eKAI-2000M\u003cbr\u003eKAI-2001M\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd width=\"96\" bgcolor=\"#800000\" align=\"center\"\u003e\u003cspan style=\"color: #ffffff; font-family: Arial; font-size: small;\"\u003e\u003cstrong\u003eKAI-2020M\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd width=\"331\" bgcolor=\"#FFFFC4\"\u003e\u003cspan style=\"font-family: Arial; font-size: small;\"\u003e\u003cstrong\u003eTypical Read Noise (rms) average\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd width=\"108\" bgcolor=\"#FFFFC4\" align=\"center\"\u003e\u003cspan style=\"font-family: Arial; font-size: small;\"\u003e13.5 e-\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd width=\"96\" bgcolor=\"#FFFFC4\" align=\"center\"\u003e\u003cspan style=\"font-family: Arial; font-size: small;\"\u003e\u003cstrong\u003e7.6 e-\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd width=\"331\" bgcolor=\"#FFFFC4\"\u003e\u003cspan style=\"font-family: Arial; font-size: small;\"\u003e\u003cstrong\u003eTypical Dark Current (average e-\/p\/s at 0 deg. C )\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd width=\"108\" bgcolor=\"#FFFFC4\" align=\"center\"\u003e\u003cspan style=\"font-family: Arial; font-size: small;\"\u003e0.18 e-\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd width=\"96\" bgcolor=\"#FFFFC4\" align=\"center\"\u003e\u003cspan style=\"font-family: Arial; font-size: small;\"\u003e\u003cstrong\u003e0.06 e-\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd width=\"331\" bgcolor=\"#FFFFC4\"\u003e\u003cspan style=\"font-family: Arial; font-size: small;\"\u003e\u003cstrong\u003eTypical Dark Current in the top 1% of pixels\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd width=\"108\" bgcolor=\"#FFFFC4\" align=\"center\"\u003e\u003cspan style=\"font-family: Arial; font-size: small;\"\u003e2.5 e-\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd width=\"96\" bgcolor=\"#FFFFC4\" align=\"center\"\u003e\u003cspan style=\"font-family: Arial; font-size: small;\"\u003e\u003cstrong\u003e1.1 e-\u003c\/strong\u003e\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\u003cdiv align=\"left\"\u003e\n\u003ctable cellpadding=\"3\" cellspacing=\"1\" border=\"1\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cimg height=\"375\" width=\"574\" alt=\"2020_ave_read_chart.gif (8942 bytes)\" src=\"http:\/\/www.company7.com\/library\/sbig\/sbwgifs\/2020_ave_read_chart.gif\"\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cp\u003e\u003cspan style=\"font-family: Times New Roman; font-size: large;\"\u003eThe average read noise has been reduced by almost half in the new KAI-2020M CCD.  Previous KAI-2000 series CCDs tested just under 14e- rms but the new KAI-2020M typically measures less than 8e-.\u003c\/span\u003e\u003c\/p\u003e\n\u003cdiv align=\"left\"\u003e\n\u003ctable cellpadding=\"3\" cellspacing=\"1\" border=\"1\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cimg height=\"373\" width=\"574\" alt=\"2020_ave_dark_chart.gif (11583 bytes)\" src=\"http:\/\/www.company7.com\/library\/sbig\/sbwgifs\/2020_ave_dark_chart.gif\"\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cp\u003e\u003cspan style=\"font-family: Times New Roman; font-size: large;\"\u003eMeasurements made of a number of cameras show that the previous CCDs had an average dark current of 0.13e-  and 0.18e- for the KAI-2000M and KAI-2001M respectively.  Tests of a similar sampling of cameras made with the new KAI-2020M CCD show an average dark current of 0.06e-. \u003c\/span\u003e\u003c\/p\u003e\n\u003cdiv align=\"left\"\u003e\n\u003ctable cellpadding=\"3\" cellspacing=\"1\" border=\"1\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cimg height=\"373\" width=\"573\" alt=\"2020_top_percent_chart.gif (10978 bytes)\" src=\"http:\/\/www.company7.com\/library\/sbig\/sbwgifs\/2020_top_percent_chart.gif\"\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cp\u003e\u003cspan style=\"font-family: Times New Roman; font-size: large;\"\u003eMeasurements of the dark current in the top 1% of pixels shows a dramatic improvement.  The previous detectors measured showed an average dark current in these pixels of around 2.5e- whereas the KAI-2020M measures on average only about 1.1e-. \u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan style=\"font-family: Times New Roman; font-size: large;\"\u003eThe lower read noise, lower dark current and reduced bright points (see below) combine to significantly enhance the performance of this new CCD.  \u003c\/span\u003e\u003c\/p\u003e\n\u003chr\u003e\n\u003cp\u003e\u003cspan style=\"font-family: Times New Roman; font-size: x-large;\"\u003e\u003ca name=\"Improved%20(Reduced)%20Bright%20Points\"\u003e\u003c\/a\u003eReduced Bright Points\u003c\/span\u003e\u003c\/p\u003e\n\u003ctable cellpadding=\"0\" bgcolor=\"#C0C0C0\" cellspacing=\"1\" border=\"1\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd bgcolor=\"#000000\" rowspan=\"3\"\u003e\u003cimg height=\"331\" width=\"824\" alt=\"dark_compare.jpg (191888 bytes)\" src=\"http:\/\/www.company7.com\/library\/sbig\/sbwgifs\/dark_compare.jpg\"\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e\u003cspan style=\"font-family: Times New Roman; font-size: large;\"\u003eBright points are different from dark current.  Bright points are a population of brighter than average pixels.  A comparison of one minute dark frames from the KAI-2020M and KAI-2001M illustrates the effect of the ~10X reduction in bright points.  The KAI-2020M image is on the right, above.  In either case, the bright points are very effectively removed with a filter in CCDOPS and other programs, and whenever a dark frame is subtracted from a light frame.  The reduction in bright points does make a cosmetic improvement in unsubtracted images, however.  The larger 4 Megapixel KAI-4020M CCD, for example, is very similar in performance to the KAI-2020M, it has virtually the same CCD architecture, read noise and dark current, just more pixels.  To see some sample images taken with the 4020M CCD that are not dark subtracted,\u003cspan\u003e \u003c\/span\u003e\u003ca href=\"http:\/\/www.company7.com\/library\/sbig\/mb\/4020.htm\"\u003eclick here\u003c\/a\u003e.\u003c\/span\u003e\u003c\/p\u003e\n\u003chr\u003e\n\u003cp\u003e\u003cspan style=\"font-family: Times New Roman;\"\u003e\u003ca name=\"Improved%20Quantum%20Efficiency\"\u003e\u003c\/a\u003e\u003cbig\u003e\u003cbig\u003eImproved Quantum Efficiency\u003c\/big\u003e\u003c\/big\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cdiv align=\"left\"\u003e\n\u003ctable cellpadding=\"3\" cellspacing=\"1\" border=\"1\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cimg height=\"378\" width=\"577\" alt=\"2020_2001_qe_chart.gif (8970 bytes)\" src=\"http:\/\/www.company7.com\/library\/sbig\/sbwgifs\/2020_2001_qe_chart.gif\"\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cp\u003e\u003cspan style=\"font-family: Times New Roman; font-size: large;\"\u003eThe QE of the new KAI-2020M CCD used in the ST-2000M Camera since July 2004 is the same as the ST-2001M, in use since January 2003.  It is significantly higher across the visible spectrum than the former KAI-2000M CCD.  Typical of the Kodak interline CCDs, this improvement is greater towards the blue and green portion of the spectrum and smaller towards the red and near IR portion of the spectrum.  Nevertheless, the camera is quite capable of H-alpha imaging through a narrow band filter. \u003cspan\u003e \u003c\/span\u003e\u003ca href=\"http:\/\/www.company7.com\/library\/sbig\/mb\/Ha\/Ha2000.htm\"\u003eFor examples of some H-alpha images with the new CCD click here\u003c\/a\u003e.   The KAI-2001M CCD is used in all ST-2000XM cameras produced in 1993, up until July, 2004 (serial numbers beginning with 20301xxx and ending with 20406xxx).  The KAI-2020M CCD is used in cameras beginning with serial numbers 20407xxx. \u003c\/span\u003e\u003c\/p\u003e\n\u003chr\u003e\n\u003cp\u003e\u003cspan style=\"font-family: Times New Roman;\"\u003e\u003cbig\u003e\u003cbig\u003e\u003ca name=\"Improved%20Autoguiding\"\u003e\u003c\/a\u003eImproved Autoguiding\u003cspan\u003e \u003c\/span\u003ewith a Built-In TC-237H Autoguider\u003c\/big\u003e\u003c\/big\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003ctable bgcolor=\"#C0C0C0\" cellpadding=\"6\" cellspacing=\"1\" border=\"1\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd bgcolor=\"#000000\" rowspan=\"3\"\u003e\u003cimg height=\"218\" width=\"228\" border=\"0\" alt=\"usb_autoguider3.jpg (38499 bytes)\" src=\"http:\/\/www.company7.com\/library\/sbig\/sbwgifs\/usb_autoguider3.jpg\"\u003e\u003c\/td\u003e\n\u003ctd bgcolor=\"#E2E2E2\"\u003e\u003cspan style=\"font-family: Arial; font-size: small;\"\u003eBuilt-in\u003cbr\u003eAutoguider\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd bgcolor=\"#E2E2E2\" align=\"center\"\u003e\u003cspan style=\"font-family: Arial; font-size: small;\"\u003eArray\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd bgcolor=\"#E2E2E2\" align=\"center\"\u003e\u003cspan style=\"font-family: Arial; font-size: small;\"\u003ePixel Size\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd bgcolor=\"#E2E2E2\" align=\"center\"\u003e\u003cspan style=\"font-family: Arial; font-size: small;\"\u003eCCD Dimension\u003cbr\u003e--------\u003cbr\u003e( Area )\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd bgcolor=\"#E2E2E2\" align=\"center\"\u003e\u003cspan style=\"font-family: Arial; font-size: small;\"\u003eField of View\u003cbr\u003eat 80\" FL\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd bgcolor=\"#E2E2E2\" align=\"center\"\u003e\u003cspan style=\"font-family: Arial; font-size: small;\"\u003eNumber of\u003cbr\u003ePixels\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd bgcolor=\"#E2E2E2\"\u003e\u003cspan style=\"font-family: Arial; font-size: small;\"\u003e\u003cstrong\u003eTC-237H CCD\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd bgcolor=\"#E2E2E2\" align=\"center\"\u003e\u003cstrong\u003e\u003cspan style=\"font-family: Arial; font-size: small;\"\u003e657 x 495\u003c\/span\u003e\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd bgcolor=\"#E2E2E2\" align=\"center\"\u003e\u003cspan style=\"font-family: Arial; font-size: small;\"\u003e\u003cstrong\u003e7.4 x 7.4 u\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd bgcolor=\"#E2E2E2\" align=\"center\"\u003e\u003cspan style=\"font-family: Arial; font-size: small;\"\u003e\u003cstrong\u003e4.9 x 3.7 mm\u003cbr\u003e-----\u003cbr\u003e18.3 mm\u003csup\u003e2\u003c\/sup\u003e\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd bgcolor=\"#E2E2E2\" align=\"center\"\u003e\u003cspan style=\"font-family: Arial; font-size: small;\"\u003e\u003cstrong\u003e8.2 x 6.2\u003cbr\u003earcminutes\u003cbr\u003e( 51 arcmin\u003csup\u003e2\u003c\/sup\u003e\u003cspan\u003e \u003c\/span\u003e)\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd bgcolor=\"#E2E2E2\" align=\"center\"\u003e\u003cspan style=\"font-family: Arial; font-size: small;\"\u003e\u003cstrong\u003e325,215\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd bgcolor=\"#E2E2E2\"\u003e\u003cspan style=\"font-family: Arial; font-size: small;\"\u003eTC-211 CCD\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd bgcolor=\"#E2E2E2\" align=\"center\"\u003e\u003cspan style=\"font-family: Arial; font-size: small;\"\u003e192 x 164\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd bgcolor=\"#E2E2E2\" align=\"center\"\u003e\u003cspan style=\"font-family: Arial; font-size: small;\"\u003e~ 15 u\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd bgcolor=\"#E2E2E2\" align=\"center\"\u003e\u003cspan style=\"font-family: Arial; font-size: small;\"\u003e2.6 x 2.6 mm\u003cbr\u003e-----\u003cbr\u003e6.8 mm\u003csup\u003e2\u003c\/sup\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd bgcolor=\"#E2E2E2\" align=\"center\"\u003e\u003cspan style=\"font-family: Arial; font-size: small;\"\u003e4.5 x 4.5\u003cbr\u003earcminutes\u003cbr\u003e( 20 arcmin\u003csup\u003e2\u003c\/sup\u003e)\u003cbr\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd bgcolor=\"#E2E2E2\" align=\"center\"\u003e\u003cspan style=\"font-family: Arial; font-size: small;\"\u003e31,000\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e\u003cspan style=\"font-family: Times New Roman; font-size: large;\"\u003eThe TC-237 autoguiding CCD is seen here just below the larger imaging CCD.  The TC-237H is the same CCD used in our $1300 ST-237A imaging camera and $2300 STV autoguider.  The TC-237H is 2.7X larger than the TC-211 CCD which means there is a more than double the chance you will find suitable guide stars anywhere you happen to be looking without having to hunt.  The sample images below demonstrate the difference in field of view.   \u003c\/span\u003e\u003c\/p\u003e\n\u003ctable height=\"25\" width=\"741\" bgcolor=\"#C0C0C0\" cellspacing=\"1\" cellpadding=\"6\" border=\"1\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd height=\"17\" width=\"5\" bgcolor=\"#808080\"\u003e\u003cimg height=\"162\" width=\"190\" border=\"0\" alt=\"tc211tracker.jpg (18767 bytes)\" src=\"http:\/\/www.company7.com\/library\/sbig\/sbwgifs\/tc211tracker.jpg\"\u003e\u003c\/td\u003e\n\u003ctd height=\"17\" width=\"708\" bgcolor=\"#DDDDDD\"\u003e\n\u003cspan style=\"font-family: Arial; font-size: small;\"\u003e\u003cstrong\u003eField of View of TC-211 autoguider through an 8\" SCT at F\/7\u003c\/strong\u003e\u003c\/span\u003e\u003cspan style=\"font-family: Arial;\"\u003e\u003cbr\u003e\u003csmall\u003e30 second unguided image centered on NGC 2903 taken with the\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eTC-211\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003etracking CCD.\u003c\/small\u003e\u003c\/span\u003e\n\u003cp\u003e\u003cspan style=\"font-family: Arial;\"\u003e\u003csmall\u003e192 x 164 pixels at ~15 microns (unbinned).\u003c\/small\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ctable height=\"254\" width=\"741\" bgcolor=\"#C0C0C0\" cellspacing=\"1\" cellpadding=\"6\" border=\"1\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd height=\"246\" width=\"328\" bgcolor=\"#808080\"\u003e\u003cimg height=\"247\" width=\"328\" alt=\"tc237tracker.jpg (32391 bytes)\" src=\"http:\/\/www.company7.com\/library\/sbig\/sbwgifs\/tc237tracker.jpg\"\u003e\u003c\/td\u003e\n\u003ctd height=\"246\" width=\"397\" bgcolor=\"#DDDDDD\"\u003e\n\u003cstrong\u003e\u003cspan style=\"font-family: Arial; font-size: small;\"\u003eField of View of TC-237 autoguider through an 8\" SCT at F\/7\u003c\/span\u003e\u003cbr\u003e\u003c\/strong\u003e\u003cspan style=\"font-family: Arial;\"\u003e\u003cbr\u003e\u003csmall\u003e30 second unguided image of the same area taken with the\u003c\/small\u003e\u003cbr\u003e\u003csmall\u003e\u003cstrong\u003eTC-237\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003etracking CCD demonstrates the benefit of having 2.7X the\u003c\/small\u003e\u003cbr\u003e\u003csmall\u003efield of view:  An increase in the number of potential guide stars stars.\u003c\/small\u003e\u003c\/span\u003e\n\u003cp\u003e\u003cspan style=\"font-family: Arial;\"\u003e\u003csmall\u003e328 x 247 pixels at 14.8 microns (binned 2x2).\u003c\/small\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e\u003cspan style=\"font-family: Times New Roman; font-size: large;\"\u003eIn the tracking configuration, the TC-237H CCD will normally be binned 2x2 for increased sensitivity.  When binned 2x2 the field of view remains 2.7X that of the TC-211 however as the pixel size is increased to 14.8 microns.  The user may also image with the TC-237 CCD in high resolution (unbinned) mode if desired.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan style=\"font-family: Times New Roman; font-size: large;\"\u003eAs of March, 2006, both the single CCD and dual CCD models also come with the\u003cspan\u003e \u003c\/span\u003e\u003ca href=\"http:\/\/www.company7.com\/library\/sbig\/sbwhtmls\/stremoteup.htm\"\u003eRemote Guide Head port\u003c\/a\u003e\u003cspan\u003e \u003c\/span\u003efor attaching an external guiding head.  ThsSky software from Software Bisque automatically generates finder charts showing the correct placement of the guiding CCD field of view relative to the imaging CCD's field of view.  Using this tool to plan your nights imaging is a great compliment to the self-guiding c\u003c\/span\u003e\u003cstrong\u003e\u003cspan style=\"font-family: Arial;\"\u003eameras.  \u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cdiv align=\"left\"\u003e\n\u003ctable cellpadding=\"6\" width=\"741\" bgcolor=\"#C0C0C0\" cellspacing=\"1\" border=\"1\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd bgcolor=\"#808080\" width=\"228\"\u003e\u003cimg height=\"218\" width=\"228\" alt=\"usb_autoguider_sky4.jpg (36434 bytes)\" src=\"http:\/\/www.company7.com\/library\/sbig\/sbwgifs\/usb_autoguider_sky4.jpg\"\u003e\u003c\/td\u003e\n\u003ctd width=\"501\" bgcolor=\"#E0E0E0\"\u003e\u003cspan style=\"font-family: Arial; font-size: small;\"\u003ePreviously, the camera had to be oriented so that the X and Y dimensions of the tracking CCD were aligned with the RA and DEC of the telescope, limiting the possible rotation of the camera to four possible positions around a target at at 90 degree steps.  Now, with CCDSoftV5, the autoguiding capability of the TC-211 (and TC-237) is improved so that the camera may be placed in any orientation relative to the telescope's RA and DEC, allowing a full 360 degrees of rotation around a target for easier guide star acquisition.\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cp\u003e\u003cspan style=\"font-family: t; font-size: large;\"\u003eOf course, guiding with either the TC-211 or the TC237 tracking CCD means that the imaging CCD spends 100% of its time and quantum efficiency gathering the image.  You are not required to compromise for half the quantum efficiency or twice exposure time as you might with other self-guiding designs.\u003c\/span\u003e\u003c\/p\u003e\n\u003chr\u003e\n\u003cp\u003e\u003cspan style=\"font-family: Times New Roman;\"\u003e\u003cbig\u003e\u003cbig\u003eUpgraded Software -\u003cspan\u003e \u003c\/span\u003e\u003ca name=\"TheSky,%20Version%205,%20Level%20II%20from%20Software%20Bisque\"\u003e\u003c\/a\u003eTheSky, Version 5, Level II from Software Bisque\u003c\/big\u003e\u003c\/big\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg height=\"244\" width=\"480\" alt=\"TheSkyHead3.gif (43916 bytes)\" src=\"http:\/\/www.company7.com\/library\/sbig\/sbwgifs\/TheSkyHead3.gif\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan style=\"font-family: Times New Roman; font-size: large;\"\u003eBeginning with all camera shipped in October, 2004, we will include TheSKy version 5, level II, instead of version 4.  TheSky version 5, level II, is a complete camera control, image processing, astrometric, star-charting and planetarium software program for the PC.  This is a full version of TheSky version 5, complete with manual on CD-ROM.  This is a $129 value at no additional cost.  Users of TheSky version 5 may upgrade to the latest version 6 at a discount. \u003c\/span\u003e\u003c\/p\u003e\n\u003chr\u003e\n\u003cp\u003e\u003cspan style=\"font-family: Times New Roman;\"\u003e\u003cbig\u003e\u003cbig\u003eNew -\u003cspan\u003e \u003c\/span\u003e\u003ca name=\"Equinox%20Planetarium%20Software%20with%20SBIG%20Camera%20Control\"\u003e\u003c\/a\u003eEquinoX Planetarium Software with SBIG Camera Control\u003cspan\u003e \u003c\/span\u003efor Mac OS X by Microprojects\u003c\/big\u003e\u003c\/big\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cdiv align=\"left\"\u003e\n\u003ctable bgcolor=\"#C0C0C0\" cellspacing=\"1\" border=\"1\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd bgcolor=\"#E1E1E1\"\u003e\u003cimg height=\"226\" width=\"311\" alt=\"equinox_SetupTab.jpg (44325 bytes)\" src=\"http:\/\/www.company7.com\/library\/sbig\/sbwgifs\/equinox_SetupTab.jpg\"\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cimg height=\"251\" width=\"396\" alt=\"EquinoXScreen_50.jpg (84965 bytes)\" src=\"http:\/\/www.company7.com\/library\/sbig\/sbwgifs\/EquinoXScreen_50.jpg\"\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cp\u003e\u003cspan style=\"font-family: Times New Roman; font-size: large;\"\u003eIf you use an Apple Macintosh G3, G4 or G5, with OS X 10.2 or later, Equinox 5.1 can control SBIG USB and Ethernet cameras.  SBIG will send a free copy of Equinox upon request to any new SBIG camera purchaser with proof of purchase.   Send us a copy of your invloce with camera serial number.  Click on the links below to the Microprojects web site for more information:\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan style=\"font-family: Times New Roman; font-size: large;\"\u003e\u003ca href=\"http:\/\/www.microprojects.ca\/SBIGInfo.html\"\u003eSBIG camera control features and screen shots\u003c\/a\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan style=\"font-family: Times New Roman; font-size: large;\"\u003e\u003ca href=\"http:\/\/www.microprojects.ca\/index.html\"\u003eFind out more about Equinox planetarium features\u003c\/a\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003chr\u003e\n\u003cp\u003e\u003cspan style=\"font-family: Times New Roman;\"\u003e\u003ca name=\"Deluxe%20Carrying%20and%20Storage%20Case\"\u003e\u003c\/a\u003e\u003cbig\u003e\u003cbig\u003eDeluxe Carrying and Storage Case\u003c\/big\u003e\u003c\/big\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cdiv align=\"left\"\u003e\n\u003ctable width=\"117\" bgcolor=\"#C0C0C0\" cellpadding=\"3\" cellspacing=\"1\" border=\"1\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd width=\"1\" bgcolor=\"#C0C0C0\"\u003e\u003cimg height=\"250\" width=\"334\" alt=\"wpe9.jpg (7450 bytes)\" src=\"http:\/\/www.company7.com\/library\/sbig\/sbwgifs\/st20001.jpg\"\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cp\u003e\u003cspan style=\"font-family: Times New Roman; font-size: large;\"\u003eThe ST-2000XM and ST-2000XCM models now include a high quality\u003cspan\u003e \u003c\/span\u003e\u003ca href=\"http:\/\/www.company7.com\/library\/sbig\/sbwhtmls\/cases.htm\"\u003ecarrying and storage case\u003c\/a\u003e\u003cspan\u003e \u003c\/span\u003emade for SBIG by Pelican.   This deluxe carrying case is dust proof, water proof, crush proof and carries a lifetime guarantee from the manufacturer.  The custom cut foam securely holds the camera and power supply with additional spots for accessories, cables, etc.  There is even room for the camera with filter wheel and AO-7 attached. \u003c\/span\u003e\u003c\/p\u003e\n\u003chr\u003e\n\u003cp\u003e\u003cbig\u003e\u003cspan style=\"font-family: Times New Roman;\"\u003e\u003cbig\u003e\u003ca name=\"Upgrades\"\u003e\u003c\/a\u003eUpgrades\u003cbr\u003e\u003c\/big\u003e\u003c\/span\u003e\u003c\/big\u003e\u003cspan style=\"font-family: Arial;\"\u003e\u003cbr\u003e\u003c\/span\u003e\u003cspan style=\"font-family: Times New Roman; font-size: large;\"\u003eUpgrades to a TC-237H autoguiding CCD are available to all previous ST-2000XM owners for $395.  Upgrades to the new KAI-2020M imaging CCD are available for $995 for owners of older cameras.  Upgrades from TheSky version 5 to the latest version 6 are available from\u003cspan\u003e \u003c\/span\u003e\u003ca href=\"http:\/\/www.bisque.com\/\"\u003eSoftware Bisque\u003c\/a\u003e.  The custom Pelican carrying case is available for $149.\u003c\/span\u003e\u003c\/p\u003e\n\u003chr\u003e\n\u003cdiv align=\"right\"\u003e\n\u003ctable align=\"right\" bgcolor=\"#C0C0C0\" cellpadding=\"3\" cellspacing=\"1\" border=\"1\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd bgcolor=\"#800000\" colspan=\"3\"\u003e\n\u003cp align=\"center\"\u003e\u003cspan style=\"color: #ffffff; font-family: Arial; font-size: small;\"\u003e\u003cstrong\u003eST-2000XM Comparison Chart\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd bgcolor=\"#FFFFC4\"\u003e \u003c\/td\u003e\n\u003ctd bgcolor=\"#FFFFC4\" align=\"center\"\u003e\u003cspan style=\"font-family: Arial; font-size: small;\"\u003e\u003cstrong\u003eST-2000XMI\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd bgcolor=\"#FFFFC4\" align=\"center\"\u003e\u003cspan style=\"font-family: Arial; font-size: small;\"\u003e\u003cstrong\u003eST-2000XM\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd bgcolor=\"#FFFFC4\"\u003e\u003cspan style=\"font-family: Arial; font-size: small;\"\u003e2 Megapixel KAI-2020M CCD\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd bgcolor=\"#FFFFC4\" align=\"center\"\u003e\u003cspan style=\"font-family: Arial; font-size: small;\"\u003eone class\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd bgcolor=\"#FFFFC4\" align=\"center\"\u003e\u003cspan style=\"font-family: Arial; font-size: small;\"\u003eone class\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd bgcolor=\"#FFFFC4\"\u003e\u003cspan style=\"font-family: Arial; font-size: small;\"\u003eColumn defects allowed\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd bgcolor=\"#FFFFC4\" align=\"center\"\u003e\u003cspan style=\"font-family: Arial; font-size: small;\"\u003enone\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd bgcolor=\"#FFFFC4\" align=\"center\"\u003e\u003cspan style=\"font-family: Arial; font-size: small;\"\u003enone\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd bgcolor=\"#FFFFC4\"\u003e\u003cspan style=\"font-family: Arial; font-size: small;\"\u003eHigh Speed USB Interface\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd bgcolor=\"#FFFFC4\" align=\"center\"\u003e\u003cspan style=\"font-family: Wingdings; font-size: small;\"\u003el\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd bgcolor=\"#FFFFC4\" align=\"center\"\u003e\u003cspan style=\"font-family: Wingdings; font-size: small;\"\u003el\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd bgcolor=\"#FFFFC4\"\u003e\u003cspan style=\"font-family: Arial; font-size: small;\"\u003eInternal shutter for automatic dark frames\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd bgcolor=\"#FFFFC4\" align=\"center\"\u003e\u003cspan style=\"font-family: Wingdings; font-size: small;\"\u003el\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd bgcolor=\"#FFFFC4\" align=\"center\"\u003e\u003cspan style=\"font-family: Wingdings; font-size: small;\"\u003el\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd bgcolor=\"#FFFFC4\"\u003e\u003cspan style=\"font-family: Arial; font-size: small;\"\u003eInternal ROM for CFW8A control\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd bgcolor=\"#FFFFC4\" align=\"center\"\u003e\u003cspan style=\"font-family: Wingdings; font-size: small;\"\u003el\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd bgcolor=\"#FFFFC4\" align=\"center\"\u003e\u003cspan style=\"font-family: Wingdings; font-size: small;\"\u003el\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd bgcolor=\"#FFFFC4\"\u003e\u003cspan style=\"font-family: Arial; font-size: small;\"\u003eRegulated thermoelectric cooling with fan\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd bgcolor=\"#FFFFC4\" align=\"center\"\u003e\u003cspan style=\"font-family: Wingdings; font-size: small;\"\u003el\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd bgcolor=\"#FFFFC4\" align=\"center\"\u003e\u003cspan style=\"font-family: Wingdings; font-size: small;\"\u003el\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd bgcolor=\"#FFFFC4\"\u003e\u003cspan style=\"font-family: Arial; font-size: small;\"\u003eUniversal Power Supply\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd bgcolor=\"#FFFFC4\" align=\"center\"\u003e\u003cspan style=\"font-family: Wingdings; font-size: small;\"\u003el\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd bgcolor=\"#FFFFC4\" align=\"center\"\u003e\u003cspan style=\"font-family: Wingdings; font-size: small;\"\u003el\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd bgcolor=\"#FFFFC4\"\u003e\u003cspan style=\"font-family: Arial; font-size: small;\"\u003eUSB Cable\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd bgcolor=\"#FFFFC4\" align=\"center\"\u003e\u003cspan style=\"font-family: Wingdings; font-size: small;\"\u003el\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd bgcolor=\"#FFFFC4\" align=\"center\"\u003e\u003cspan style=\"font-family: Wingdings; font-size: small;\"\u003el\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd bgcolor=\"#FFFFC4\"\u003e\u003cspan style=\"font-family: Arial; font-size: small;\"\u003eAdjustable t-thread interface block\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd bgcolor=\"#FFFFC4\" align=\"center\"\u003e\u003cspan style=\"font-family: Wingdings; font-size: small;\"\u003el\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd bgcolor=\"#FFFFC4\" align=\"center\"\u003e\u003cspan style=\"font-family: Wingdings; font-size: small;\"\u003el\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd bgcolor=\"#FFFFC4\"\u003e\u003cspan style=\"font-family: Arial; font-size: small;\"\u003e2\" nosepiece with t-thread base\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd bgcolor=\"#FFFFC4\" align=\"center\"\u003e\u003cspan style=\"font-family: Wingdings; font-size: small;\"\u003el\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd bgcolor=\"#FFFFC4\" align=\"center\"\u003e\u003cspan style=\"font-family: Wingdings; font-size: small;\"\u003el\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd bgcolor=\"#FFFFC4\"\u003e\u003cspan style=\"font-family: Arial; font-size: small;\"\u003eCCDOPS ver.5 software on CD-ROM\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd bgcolor=\"#FFFFC4\" align=\"center\"\u003e\u003cspan style=\"font-family: Wingdings; font-size: small;\"\u003el\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd bgcolor=\"#FFFFC4\" align=\"center\"\u003e\u003cspan style=\"font-family: Wingdings; font-size: small;\"\u003el\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd bgcolor=\"#FFFFC4\"\u003e\u003cspan style=\"font-family: Arial; font-size: small;\"\u003eCCDOPS ver.5 manual on CD-ROM\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd bgcolor=\"#FFFFC4\" align=\"center\"\u003e\u003cspan style=\"font-family: Wingdings; font-size: small;\"\u003el\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd bgcolor=\"#FFFFC4\" align=\"center\"\u003e\u003cspan style=\"font-family: Wingdings; font-size: small;\"\u003el\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd bgcolor=\"#FFFFC4\"\u003e\u003cspan style=\"font-family: Arial; font-size: small;\"\u003eCamera Operating Manual\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd bgcolor=\"#FFFFC4\" align=\"center\"\u003e\u003cspan style=\"font-family: Wingdings; font-size: small;\"\u003el\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd bgcolor=\"#FFFFC4\" align=\"center\"\u003e\u003cspan style=\"font-family: Wingdings; font-size: small;\"\u003el\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd bgcolor=\"#FFFFC4\"\u003e\u003cspan style=\"font-family: Arial; font-size: small;\"\u003eTheSky v.5, level II software on CD-ROM\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd bgcolor=\"#FFFFC4\" align=\"center\"\u003e\u003cspan style=\"font-family: Wingdings; font-size: small;\"\u003el\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd bgcolor=\"#FFFFC4\" align=\"center\"\u003e\u003cspan style=\"font-family: Wingdings; font-size: small;\"\u003el\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd bgcolor=\"#FFFFC4\"\u003e\u003cspan style=\"font-family: Arial; font-size: small;\"\u003eTC-237H Tracking CCD (657x495 at 7.4u)\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd bgcolor=\"#FFFFC4\" align=\"center\"\u003e\u003cspan style=\"font-family: Arial; font-size: small;\"\u003e$395\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd bgcolor=\"#FFFFC4\" align=\"center\"\u003e\u003cspan style=\"font-family: Wingdings; font-size: small;\"\u003el\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd bgcolor=\"#FFFFC4\"\u003e\u003cspan style=\"font-family: Arial; font-size: small;\"\u003eCustom Pelican Carrying Case\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd bgcolor=\"#FFFFC4\" align=\"center\"\u003e\u003cspan style=\"font-family: Arial; font-size: small;\"\u003e$149\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd bgcolor=\"#FFFFC4\" align=\"center\"\u003e\u003cspan style=\"font-family: Wingdings; font-size: small;\"\u003el\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd bgcolor=\"#FFFFC4\"\u003e\u003cspan style=\"font-family: Arial; font-size: small;\"\u003eWater Cooling Heat Exchanger\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd bgcolor=\"#FFFFC4\" align=\"center\"\u003e\u003cspan style=\"font-family: Arial; font-size: small;\"\u003e$99\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd bgcolor=\"#FFFFC4\" align=\"center\"\u003e\u003cspan style=\"font-family: Wingdings; font-size: small;\"\u003el\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd bgcolor=\"#FFFFC4\"\u003e\u003cspan style=\"font-family: Arial; font-size: small;\"\u003eST-7RC Adapter and Relay Cable\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd bgcolor=\"#FFFFC4\" align=\"center\"\u003e\u003cspan style=\"font-family: Arial; font-size: small;\"\u003e$9\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd bgcolor=\"#FFFFC4\" align=\"center\"\u003e\u003cspan style=\"font-family: Wingdings; font-size: small;\"\u003el\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd bgcolor=\"#FFFFC4\"\u003e\u003cspan style=\"font-family: Arial; font-size: small;\"\u003ePrinted Camera Operating Manual\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd bgcolor=\"#FFFFC4\" align=\"center\"\u003e\u003cspan style=\"font-family: Arial; font-size: small;\"\u003e$15\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd bgcolor=\"#FFFFC4\" align=\"center\"\u003e\u003cspan style=\"font-family: Wingdings; font-size: small;\"\u003el\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd bgcolor=\"#FFFFC4\"\u003e\u003cspan style=\"font-family: Arial; font-size: small;\"\u003ePrinted CCDOPS ver.5 manual\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd bgcolor=\"#FFFFC4\" align=\"center\"\u003e\u003cspan style=\"font-family: Arial; font-size: small;\"\u003e$15\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd bgcolor=\"#FFFFC4\" align=\"center\"\u003e\u003cspan style=\"font-family: Arial; font-size: small;\"\u003e$15\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd bgcolor=\"#FFFFC4\"\u003e\u003cspan style=\"font-family: Arial; font-size: small;\"\u003e1.25\" Nosepiece\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd bgcolor=\"#FFFFC4\" align=\"center\"\u003e\u003cspan style=\"font-family: Arial; font-size: small;\"\u003e$49\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd bgcolor=\"#FFFFC4\" align=\"center\"\u003e\u003cspan style=\"font-family: Arial; font-size: small;\"\u003e$49\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cp\u003e\u003cspan style=\"font-family: Times New Roman;\"\u003e\u003cspan\u003e\u003cbig\u003eThe ST-2000XM is a complete camera \u003ca name=\"system\"\u003e\u003c\/a\u003esystem.  There is no need to add in the additional cost of an interface or an autoguider or a nosepiece or better software to make these cameras actually operate as they should.  Everything that is needed to make the camera operational is included in the base price.  We even include some non-essential, but desirable, items such as a custom hard carrying case.\u003c\/big\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan style=\"font-family: Times New Roman;\"\u003e\u003cbig\u003e\u003cbig\u003eComplete Systems\u003c\/big\u003e\u003c\/big\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan style=\"font-family: Times New Roman; font-size: large;\"\u003eEach new ST-2000XM camera system INCLUDES at no additional cost:\u003c\/span\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan style=\"font-family: Times New Roman; font-size: large;\"\u003eRugged camera body with imaging and autoguiding CCDs and new analog and digital electronics\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan style=\"font-family: Times New Roman; font-size: large;\"\u003e\u003cstrong\u003e2 Megapixel KAI-2020M imaging CCD with reduced read noise, lower dark current and 10X reduced bright pixels.\u003c\/strong\u003e\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan style=\"font-family: Times New Roman; font-size: large;\"\u003e\u003cstrong\u003eBuilt-in TC-237H CCD autoguider with 10X the sensitivity of an ST-4 (TC-211 prior to 8\/18\/03).\u003c\/strong\u003e\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan style=\"font-family: Times New Roman; font-size: large;\"\u003e\u003cstrong\u003eRemote Guide Head Port\u003c\/strong\u003e\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan style=\"font-family: Times New Roman; font-size: large;\"\u003e\u003cstrong\u003eHigh speed USB interface (up to 421,000 pixels per second)\u003c\/strong\u003e\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan style=\"font-family: Times New Roman; font-size: large;\"\u003eNew I\u003cstrong\u003e\u003csup\u003e2\u003c\/sup\u003e\u003c\/strong\u003eC bi-directional expansion port, compatible with the new CFW-10 filter wheel.\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan style=\"font-family: Times New Roman; font-size: large;\"\u003eStandard accessory \/ telescope port\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan style=\"font-family: Times New Roman; font-size: large;\"\u003eUser rechargeable desiccant plug (no need to return the camera to the factory for frosting problems)\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan style=\"font-family: Times New Roman; font-size: large;\"\u003e\"Dummy\" desiccant plug for dust prevention during recharging procedure\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan style=\"font-family: Times New Roman; font-size: large;\"\u003eInternal shutter\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan style=\"font-family: Times New Roman; font-size: large;\"\u003e2\" Nosepiece\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan style=\"font-family: Times New Roman; font-size: large;\"\u003eCooling Fan - on\/off controlled by software\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan style=\"font-family: Times New Roman; font-size: large;\"\u003eNew heat exchanger design with water cooling capability\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan style=\"font-family: Times New Roman; font-size: large;\"\u003eTripod mount 1\/4-20 threaded side plate\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan style=\"font-family: Times New Roman; font-size: large;\"\u003eT-thread ring\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan style=\"font-family: Times New Roman; font-size: large;\"\u003e15 foot USB cable (third party USB extenders available for up to 500 meters!)\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan style=\"font-family: Times New Roman; font-size: large;\"\u003eAdapter plug for telescope interface cable (for autoguiding)\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan style=\"font-family: Times New Roman; font-size: large;\"\u003eTelescope interface cable (for autoguiding)\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan style=\"font-family: Times New Roman; font-size: large;\"\u003eUniversal 90-240VAC power supply with remote on\/off switch\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan style=\"font-family: Times New Roman; font-size: large;\"\u003eSBIG's CCDOPS version 5 camera control software with new, updated, CCDOPS manual on CDROM\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan style=\"font-family: Times New Roman; font-size: large;\"\u003e\u003cstrong\u003eSoftware Bisque's CCDSoftV5\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003ecamera control and image processing software\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan style=\"font-family: Times New Roman; font-size: large;\"\u003e\u003cstrong\u003eSoftware Bisque's TheSky version 5, level II, with manual on\u003cspan\u003e \u003c\/span\u003e\u003c\/strong\u003eCD-ROM\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan style=\"font-family: Times New Roman; font-size: large;\"\u003ePrinted Camera Operating Manual\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan style=\"font-family: Times New Roman; font-size: large;\"\u003eCustom design hard carrying case with pre-cut foam for your camera and accessories.\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr\u003e\n\u003cdiv align=\"center\"\u003e\n\u003ctable bgcolor=\"#C0C0C0\" cellspacing=\"1\" border=\"2\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd colspan=\"3\" bgcolor=\"#800000\"\u003e\n\u003cp align=\"center\"\u003e\u003cspan style=\"color: #ffffff; font-family: Times New Roman; font-size: large;\"\u003e\u003cstrong\u003eOptional Accessories\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd bgcolor=\"#808080\"\u003e\n\u003cp align=\"center\"\u003e\u003cimg height=\"244\" width=\"298\" src=\"http:\/\/www.company7.com\/library\/sbig\/sbwgifs\/cfw9_50.jpg\" border=\"0\"\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd bgcolor=\"#808080\"\u003e\u003cspan style=\"font-family: TimesNewRomanPSMT;\"\u003e\u003cimg height=\"279\" width=\"360\" src=\"http:\/\/www.company7.com\/library\/sbig\/products\/cfw10.jpg\" border=\"0\"\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd bgcolor=\"#808080\"\u003e\u003cimg height=\"300\" width=\"400\" src=\"http:\/\/www.company7.com\/library\/sbig\/sbwgifs\/ao8_med2.jpg\" border=\"0\"\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd align=\"center\" bgcolor=\"#800000\"\u003e\u003cspan style=\"color: #ffffff; font-family: Arial; font-size: small;\"\u003e\u003cstrong\u003eCFW9 Five Position Color Filter Wheel\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd align=\"center\" bgcolor=\"#800000\"\u003e\u003cstrong\u003e\u003cspan style=\"color: #ffffff; font-family: Arial; font-size: small;\"\u003eCFW10 Ten Posisiton Color Filter Wheel\u003c\/span\u003e\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd align=\"center\" bgcolor=\"#800000\"\u003e\u003cspan style=\"font-family: TimesNewRomanPSMT;\"\u003e\u003cstrong\u003e\u003cspan style=\"color: #ffffff; font-family: Arial; font-size: small;\"\u003eAO-8 Adaptive Optics\u003c\/span\u003e\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd bgcolor=\"#808080\"\u003e\u003cimg height=\"300\" width=\"400\" src=\"http:\/\/www.company7.com\/library\/sbig\/sbwgifs\/baader\/baader_small_filters_25.jpg\" border=\"0\"\u003e\u003c\/td\u003e\n\u003ctd bgcolor=\"#808080\"\u003e\n\u003cp align=\"center\"\u003e\u003cimg height=\"224\" width=\"253\" border=\"0\" alt=\"accessory_waterpump.jpg (37402 bytes)\" src=\"http:\/\/www.company7.com\/library\/sbig\/sbwgifs\/accessory_waterpump.jpg\"\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd bgcolor=\"#808080\"\u003e\n\u003cp align=\"center\"\u003e\u003cimg height=\"224\" width=\"253\" alt=\"accessory_spectrograph1.jpg (37296 bytes)\" src=\"http:\/\/www.company7.com\/library\/sbig\/sbwgifs\/accessory_spectrograph1.jpg\"\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd bgcolor=\"#800000\"\u003e\n\u003cp align=\"center\"\u003e\u003cstrong\u003e\u003cspan style=\"color: #ffffff; font-family: Arial; font-size: small;\"\u003eLRGB, Narrowband and Photometric filters\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd bgcolor=\"#800000\"\u003e\n\u003cp align=\"center\"\u003e\u003cspan style=\"color: #ffffff; font-family: Arial; font-size: small;\"\u003e\u003cstrong\u003eSubmersible water pump and tubing\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd bgcolor=\"#800000\"\u003e\n\u003cp align=\"center\"\u003e\u003cspan style=\"color: #ffffff; font-family: Arial; font-size: small;\"\u003e\u003cstrong\u003eSelf-Guided Spectrograph\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003chr\u003e\n\u003cp align=\"center\" class=\"MsoNormal\"\u003e\u003cspan style=\"font-family: Times New Roman;\"\u003e\u003cstrong\u003e\u003cbig\u003e\u003cbig\u003e\u003ca name=\"ST-2000XM\"\u003e\u003c\/a\u003eST-2000XM\u003cspan\u003e \u003c\/span\u003e\/ XMI\u003c\/big\u003e\u003c\/big\u003e\u003cbr\u003e\u003cbig\u003eTypical Specifications\u003c\/big\u003e\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003chr\u003e\n\u003cdiv align=\"center\"\u003e\u003ccenter\u003e\n\u003ctable cellspacing=\"0\" width=\"400\" border=\"1\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd bgcolor=\"#800000\" colspan=\"2\" align=\"left\" width=\"400\"\u003e\n\u003cp align=\"center\"\u003e\u003cspan style=\"color: #ffffff; font-family: Arial; font-size: small;\"\u003e\u003cstrong\u003eCCD\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth bgcolor=\"#FFFFC4\" align=\"right\" width=\"200\"\u003e\u003cspan style=\"font-family: Arial; font-size: small;\"\u003eCCD\u003c\/span\u003e\u003c\/th\u003e\n\u003ctd bgcolor=\"#FFFFC4\" width=\"200\" align=\"left\"\u003e\u003cspan style=\"font-family: Arial; font-size: small;\"\u003e  Kodak KAI-2020M +\u003cbr\u003e  TI TC-237\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth bgcolor=\"#FFFFC4\" align=\"right\" width=\"200\"\u003e\u003cspan style=\"font-family: Arial; font-size: small;\"\u003ePixel Array\u003c\/span\u003e\u003c\/th\u003e\n\u003ctd bgcolor=\"#FFFFC4\" width=\"200\" align=\"left\"\u003e\u003cspan style=\"font-family: Arial; font-size: small;\"\u003e  1600 x 1200 pixels\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth bgcolor=\"#FFFFC4\" align=\"right\" width=\"200\"\u003e\u003cspan style=\"font-family: Arial; font-size: small;\"\u003eCCD Size\u003c\/span\u003e\u003c\/th\u003e\n\u003ctd bgcolor=\"#FFFFC4\" width=\"200\" align=\"left\"\u003e\u003cspan style=\"font-family: Arial; font-size: small;\"\u003e  11.8 x 8.9 mm\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth bgcolor=\"#FFFFC4\" align=\"right\" width=\"200\"\u003e\u003cspan style=\"font-family: Arial; font-size: small;\"\u003eTotal Pixels\u003c\/span\u003e\u003c\/th\u003e\n\u003ctd bgcolor=\"#FFFFC4\" width=\"200\" align=\"left\"\u003e\u003cspan style=\"font-family: Arial; font-size: small;\"\u003e  2 million\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth bgcolor=\"#FFFFC4\" align=\"right\" width=\"200\"\u003e\u003cspan style=\"font-family: Arial; font-size: small;\"\u003ePixel Size\u003c\/span\u003e\u003c\/th\u003e\n\u003ctd bgcolor=\"#FFFFC4\" width=\"200\" align=\"left\"\u003e\u003cspan style=\"font-family: Arial; font-size: small;\"\u003e  7.4 x 7.4 microns square\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth bgcolor=\"#FFFFC4\" align=\"right\" width=\"200\"\u003e\u003cspan style=\"font-family: Arial; font-size: small;\"\u003eFull Well Capacity\u003c\/span\u003e\u003c\/th\u003e\n\u003ctd bgcolor=\"#FFFFC4\" width=\"200\" align=\"left\"\u003e\u003cspan style=\"font-family: Arial; font-size: small;\"\u003e  ~45,000 e- unbinned\u003cbr\u003e  ~90,000 e- binned\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth bgcolor=\"#FFFFC4\" align=\"right\" width=\"200\"\u003e\u003cspan style=\"font-family: Arial; font-size: small;\"\u003eDark Current\u003c\/span\u003e\u003c\/th\u003e\n\u003ctd bgcolor=\"#FFFFC4\" width=\"200\" align=\"left\"\u003e\u003cspan style=\"font-family: Arial; font-size: small;\"\u003e  \u0026lt;0.1e-\/pixel\/sec at 0 deg. C.\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth bgcolor=\"#FFFFC4\" align=\"right\" width=\"200\"\u003e\u003cspan style=\"font-family: Arial; font-size: small;\"\u003eAntiblooming\u003c\/span\u003e\u003c\/th\u003e\n\u003ctd bgcolor=\"#FFFFC4\" width=\"200\" align=\"left\"\u003e\u003cspan style=\"font-family: Arial; font-size: small;\"\u003e  Standard\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/center\u003e\u003c\/div\u003e\n\u003chr width=\"70%\"\u003e\n\u003cdiv align=\"center\"\u003e\u003ccenter\u003e\n\u003ctable cellspacing=\"0\" width=\"400\" border=\"1\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd bgcolor=\"#800000\" colspan=\"2\" align=\"left\" width=\"400\"\u003e\n\u003cp align=\"center\"\u003e\u003cspan style=\"color: #ffffff; font-family: Arial; font-size: small;\"\u003e\u003cstrong\u003eReadout Specifications\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth bgcolor=\"#FFFFC4\" align=\"right\" width=\"200\"\u003e\u003cspan style=\"font-family: Arial; font-size: small;\"\u003eShutter\u003c\/span\u003e\u003c\/th\u003e\n\u003ctd bgcolor=\"#FFFFC4\" width=\"200\" align=\"left\"\u003e\u003cspan style=\"font-family: Arial; font-size: small;\"\u003e  Electromechanical\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth bgcolor=\"#FFFFC4\" align=\"right\" width=\"200\"\u003e\u003cspan style=\"font-family: Arial; font-size: small;\"\u003eExposure\u003c\/span\u003e\u003c\/th\u003e\n\u003ctd bgcolor=\"#FFFFC4\" width=\"200\" align=\"left\"\u003e\u003cspan style=\"font-family: Arial; font-size: small;\"\u003e  0.001 to 3600 seconds\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth bgcolor=\"#FFFFC4\" align=\"right\" width=\"200\"\u003e\u003cspan style=\"font-family: Arial; font-size: small;\"\u003eCorrelated Double Sampling\u003c\/span\u003e\u003c\/th\u003e\n\u003ctd bgcolor=\"#FFFFC4\" width=\"200\" align=\"left\"\u003e\u003cspan style=\"font-family: Arial; font-size: small;\"\u003e  Yes\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth bgcolor=\"#FFFFC4\" align=\"right\" width=\"200\"\u003e\u003cspan style=\"font-family: Arial; font-size: small;\"\u003eA\/D Converter\u003c\/span\u003e\u003c\/th\u003e\n\u003ctd bgcolor=\"#FFFFC4\" width=\"200\" align=\"left\"\u003e\u003cspan style=\"font-family: Arial; font-size: small;\"\u003e  16 bits\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth bgcolor=\"#FFFFC4\" align=\"right\" width=\"200\"\u003e\u003cspan style=\"font-family: Arial; font-size: small;\"\u003eA\/D Gain\u003c\/span\u003e\u003c\/th\u003e\n\u003ctd bgcolor=\"#FFFFC4\" width=\"200\" align=\"left\"\u003e\u003cspan style=\"font-family: Arial; font-size: small;\"\u003e  0.6e-\/ADU unbinned\u003cbr\u003e  0.9e-\/ADU binned\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth bgcolor=\"#FFFFC4\" align=\"right\" width=\"200\"\u003e\u003cspan style=\"font-family: Arial; font-size: small;\"\u003eRead Noise\u003c\/span\u003e\u003c\/th\u003e\n\u003ctd bgcolor=\"#FFFFC4\" width=\"200\" align=\"left\"\u003e\u003cspan style=\"font-family: Arial; font-size: small;\"\u003e  7.9e- rms\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth bgcolor=\"#FFFFC4\" align=\"right\" width=\"200\"\u003e\u003cspan style=\"font-family: Arial; font-size: small;\"\u003eBinning Modes\u003c\/span\u003e\u003c\/th\u003e\n\u003ctd bgcolor=\"#FFFFC4\" width=\"200\" align=\"left\"\u003e\u003cspan style=\"font-family: Arial; font-size: small;\"\u003e  1 x 1, 2 x 2, 3 x 3\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth bgcolor=\"#FFFFC4\" align=\"right\" width=\"200\"\u003e\u003cspan style=\"font-family: Arial; font-size: small;\"\u003ePixel Digitization Rate\u003c\/span\u003e\u003c\/th\u003e\n\u003ctd bgcolor=\"#FFFFC4\" width=\"200\" align=\"left\"\u003e\u003cspan style=\"font-family: Arial; font-size: small;\"\u003e  ~ 425kps\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth bgcolor=\"#FFFFC4\" align=\"right\" width=\"200\"\u003e\u003cspan style=\"font-family: Arial; font-size: small;\"\u003eFull Frame Download\u003c\/span\u003e\u003c\/th\u003e\n\u003ctd bgcolor=\"#FFFFC4\" width=\"200\" align=\"left\"\u003e\u003cspan style=\"font-family: Arial; font-size: small;\"\u003e  ~ 4.5 seconds\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/center\u003e\u003c\/div\u003e\n\u003chr width=\"70%\"\u003e\n\u003cdiv align=\"center\"\u003e\u003ccenter\u003e\n\u003ctable cellspacing=\"0\" width=\"400\" border=\"1\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth bgcolor=\"#800000\" colspan=\"2\" align=\"left\" width=\"400\"\u003e\n\u003cp align=\"center\"\u003e\u003cspan style=\"color: #ffffff; font-family: Arial; font-size: small;\"\u003e\u003cstrong\u003eSystem Specifications\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth bgcolor=\"#FFFFC4\" align=\"right\" width=\"200\"\u003e\u003cspan style=\"font-family: Arial; font-size: small;\"\u003eCooling - standard\u003c\/span\u003e\u003c\/th\u003e\n\u003ctd bgcolor=\"#FFFFC4\" width=\"200\" align=\"left\"\u003e\u003cspan style=\"font-family: Arial; font-size: small;\"\u003e  Single Stage Thermoelectric,\u003cbr\u003e  Active Fan, Water Assist\u003cbr\u003e  -45 C from Ambient Typical\u003cbr\u003e  with water, -35 C w\/air only\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth bgcolor=\"#FFFFC4\" align=\"right\" width=\"200\"\u003e\u003cspan style=\"font-family: Arial; font-size: small;\"\u003eTemperature Regulation\u003c\/span\u003e\u003c\/th\u003e\n\u003ctd bgcolor=\"#FFFFC4\" width=\"200\" align=\"left\"\u003e\u003cspan style=\"font-family: Arial; font-size: small;\"\u003e  ±0.1°C\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth bgcolor=\"#FFFFC4\" align=\"right\" width=\"200\"\u003e\u003cspan style=\"font-family: Arial; font-size: small;\"\u003ePower\u003c\/span\u003e\u003c\/th\u003e\n\u003ctd bgcolor=\"#FFFFC4\" width=\"200\" align=\"left\"\u003e\u003cspan style=\"font-family: Arial; font-size: small;\"\u003e  5VDC at 1.5 amps,\u003cbr\u003e  +\/-12VDC at 0.5 amps,\u003cbr\u003e  power supply included\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth bgcolor=\"#FFFFC4\" align=\"right\" width=\"200\"\u003e\u003cspan style=\"font-family: Arial; font-size: small;\"\u003eComputer Interface\u003c\/span\u003e\u003c\/th\u003e\n\u003ctd bgcolor=\"#FFFFC4\" width=\"200\" align=\"left\"\u003e\u003cspan style=\"font-family: Arial; font-size: small;\"\u003e  USB 1.1\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth bgcolor=\"#FFFFC4\" align=\"right\" width=\"200\"\u003e\u003cspan style=\"font-family: Arial; font-size: small;\"\u003eComputer Compatibility\u003c\/span\u003e\u003c\/th\u003e\n\u003ctd bgcolor=\"#FFFFC4\" width=\"200\" align=\"left\"\u003e\n\u003cspan style=\"font-family: Arial; font-size: small;\"\u003e \u003c\/span\u003e\u003cspan style=\"font-family: Arial; font-size: small;\"\u003eWindows 98\/2000\/Me\/XP\u003cbr\u003e  Mac OS-X \/ Vista 32 bit\u003c\/span\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth bgcolor=\"#FFFFC4\" align=\"right\" width=\"200\"\u003e\u003cspan style=\"font-family: Arial; font-size: small;\"\u003eGuiding\u003c\/span\u003e\u003c\/th\u003e\n\u003ctd bgcolor=\"#FFFFC4\" width=\"200\" align=\"left\"\u003e\u003cspan style=\"font-family: Arial; font-size: small;\"\u003e  Dual CCD Self-Guiding with\u003cbr\u003e  built-in TC-237 CC\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/center\u003e\u003c\/div\u003e\n\u003chr width=\"70%\"\u003e\n\u003cdiv align=\"center\"\u003e\u003ccenter\u003e\n\u003ctable cellspacing=\"0\" width=\"400\" border=\"1\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth bgcolor=\"#800000\" colspan=\"2\" align=\"left\" width=\"400\"\u003e\n\u003cp align=\"center\"\u003e\u003cspan style=\"color: #ffffff; font-family: Arial; font-size: small;\"\u003ePhysical Dimensions\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth bgcolor=\"#FFFFC4\" align=\"right\" width=\"200\"\u003e\u003cspan style=\"font-family: Arial; font-size: small;\"\u003eOptical Head\u003c\/span\u003e\u003c\/th\u003e\n\u003ctd bgcolor=\"#FFFFC4\" width=\"200\" align=\"left\"\u003e\u003cspan style=\"font-family: Arial; font-size: small;\"\u003e  5 inches diameter x 3 inches\u003cbr\u003e  12.5 cm diameter x 7.5 deep\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth bgcolor=\"#FFFFC4\" align=\"right\" width=\"200\"\u003e\u003cspan style=\"font-family: Arial; font-size: small;\"\u003eCPU\u003c\/span\u003e\u003c\/th\u003e\n\u003ctd bgcolor=\"#FFFFC4\" width=\"200\" align=\"left\"\u003e\u003cspan style=\"font-family: Arial; font-size: small;\"\u003e  All electronics integrated into\u003cbr\u003e  Optical Head, No CPU\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth bgcolor=\"#FFFFC4\" align=\"right\" width=\"200\"\u003e\u003cspan style=\"font-family: Arial; font-size: small;\"\u003eMounting\u003c\/span\u003e\u003c\/th\u003e\n\u003ctd bgcolor=\"#FFFFC4\" width=\"200\" align=\"left\"\u003e\u003cspan style=\"font-family: Arial; font-size: small;\"\u003e  T-Thread,\u003cbr\u003e  2\" nosepieces included\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth bgcolor=\"#FFFFC4\" align=\"right\" width=\"200\"\u003e\u003cspan style=\"font-family: Arial; font-size: small;\"\u003eWeight\u003c\/span\u003e\u003c\/th\u003e\n\u003ctd bgcolor=\"#FFFFC4\" width=\"200\" align=\"left\"\u003e\u003cspan style=\"font-family: Arial; font-size: small;\"\u003e  Approx. 2 pounds\/0.9kg\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth bgcolor=\"#FFFFC4\" align=\"right\" width=\"200\"\u003e\u003cspan style=\"font-family: Arial; font-size: small;\"\u003eBackfocus\u003c\/span\u003e\u003c\/th\u003e\n\u003ctd bgcolor=\"#FFFFC4\" width=\"200\" align=\"left\"\u003e\u003cspan style=\"font-family: Arial; font-size: small;\"\u003e  0.92 inches \/ 2.3 cm\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/center\u003e\u003c\/div\u003e\n\u003chr\u003e\n\u003cdiv align=\"center\"\u003e\n\u003ccenter\u003e\u003c\/center\u003e\n\u003cbr\u003e\n\u003c\/div\u003e","brand":"SBIG","offers":[{"title":"Default Title","offer_id":47979462131971,"sku":"U2604-SB-ST2000XM","price":125.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/797bba79-9725-4c1c-a036-5bd9b0e2c4da.jpg?v=1776898976"},{"product_id":"used-qsi-583wsg-8-8-3mp-cooled-ccd-camera-w-color-filter-wheel-and-guider-port","title":"Used QSI 583wsg-8 8.3mp Cooled CCD Camera w\/color filter wheel + guider port","description":"\u003ch2\u003eHUGE PRICE DROP!  Was $400.  Now just \u003cspan style=\"text-decoration: underline;\"\u003e$175!\u003c\/span\u003e  \u003c\/h2\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCondition\u003c\/strong\u003e: This is a used QSI583wsg cooled CCD camera that is about 15 years old.  But the specs are still good - 8.3 megapixels, an internal 5-position filter wheel, and an off-axis prism guider, as well as a separate external guideport.  \u003c\/p\u003e\n\u003cp\u003eThis includes a power supply, cable\/cord attachments, dust covers, and the original manual, and comes in a Pelican-type foam-lined hard-sided case.  \u003cmeta charset=\"utf-8\"\u003eThere are no returns on this item. \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eDescription\u003c\/strong\u003e:\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cstrong\u003eQSI 583wsg CCD Camera with Integrated Guider Port and Color Filter Wheel\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eThe QSI 583 camera employs an 8.3 megapixel Kodak Enhanced Response full-frame CCD image sensor with microlens technology. The high quantum efficiency, wide dynamic range and low noise performance make the 532 ideally suited to a broad range of demanding astronomical, scientific and industrial imaging applications.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eThe KAF-8300 sensor has a photoactive array of 3326W x 2504H pixels. It has excellent quantum efficiency between 350nm and 1000nm with significant enhancement at the blue end of the spectrum. Low dark current and high pixel charge capacity result in a dynamic range exceeding 70db. The sensor employs a true two-phase charge transfer technology with a transparent gate that significantly increases optical response compared to traditional front illuminated full frame sensors. Micro lenses cover the surface of the CCD and focus the light through the transparent gate to further increase optical response.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cbr\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eMechanical Shutter\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eThe Model 583s incorporates the internal mechanical shutter in the 'mid-size' camera body configuration . The shutter is not only used for timing exposures, but can be left closed to produce 'dark frames' for subsequent image processing. Exposures can range from 0.03 seconds to 240 minutes.\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003e583ws adds Internal Color Filter Wheel\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eThe Model 583ws adds an internal five position filter wheel to the camera in a 'full-size' camera body. The filter wheel accepts any standard 1.25\" filter and can be purchased with various filter configurations. The filter wheel can easily be removed and replaced to change or clean the glass filters. Additional filter wheels can be purchased allowing quick interchange of different filter set configurations.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eThe close positioning of the internal filter wheel allows unvignetted images with scopes as fast as f\/4 using standard 1.25\" filters, or as fast as f\/2.8 utilizing the new unmounted 31mm filters. Save hundreds of dollars over cameras that require external filter wheels with larger diameter filters.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cbr\u003e\u003cstrong\u003e\u003cspan\u003e583wsg adds Integrated Guider Port\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eThe Model 583wsg camera has the internal mechanical shutter and color filter wheel like the 583ws, plus it adds an Integrated Guider Port. This allows guiding using the light from your main telescope while picking off the light from the guide star in front of the filters.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cbr\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cstrong\u003eThe Benefits of Scientific Imaging Performance\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eQSI's scientific-grade CCD cameras deliver image quality equal to or better than cameras costing thousands more. The lower noise and other benefits of a QSI camera allow you to \u003cem\u003ecapture better data in less time\u003c\/em\u003e. What does scientific imaging performance really mean?  There are four key traits that distinguish a scientific camera:\u003c\/span\u003e\u003c\/p\u003e\n\u003col type=\"1\"\u003e\n\u003cli\u003e\u003cspan\u003e\u003cstrong\u003eHigh sensitivity\u003c\/strong\u003e\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003e\u003cstrong\u003eLower Noise\u003c\/strong\u003e\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003e\u003cstrong\u003eLinear response to light\u003c\/strong\u003e\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003e\u003cstrong\u003ePrecisely regulated cooling\u003c\/strong\u003e\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cimg src=\"http:\/\/telescopes.net\/store\/media\/wysiwyg\/\/QSI\/qsi_nebula.jpg\" alt=\"\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cstrong\u003eHigh Sensitivity\u003c\/strong\u003e \u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eHow sensitive a CCD it to light is expressed as its Quantum Efficiency (QE).  Higher QE means you can collect more photons in any given amount of time giving you better looking images with a higher Signal to Noise Ratio (SNR).  High sensitivity is almost purely a function of the CCD.  Just about any camera using the same CCD will achieve a similar sensitivity to light. \u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eHowever, even with the same CCD, the Signal to Noise Ratio between two different cameras can be dramatically different especially in the fainter, lower signal areas of an image.  These lower signal areas, such as the fringes of nebulae or dust lanes in a galaxy, often comprise some of the most interesting parts of astronomical images.  Maximizing the SNR in these dim areas is the key to revealing those otherwise hidden details.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cstrong\u003eLower Noise = Higher Dynamic Range \u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cem\u003eNoise\u003c\/em\u003e in a CCD camera is uncertainty in the signal you’re trying to measure.  The lower the noise, the greater the dynamic range possible with any given CCD.  There are several types of noise that contribute to the overall noise in a CCD image.  \u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eCCD images are exquisitely sensitive to any noise introduced by the camera’s electronics.  Mitigating the electronic interference from the digital electronics and switching power supplies is one of the many challenges in designing and building a scientific grade CCD camera.  Any noise introduced by the camera is relatively easy to see by analyzing bias frames.  A \u003cem\u003eBias Frame\u003c\/em\u003e is a zero-length (dark) exposure which captures the slightly varying “floor value” from pixel to pixel (the bias) plus any noise added during the process of reading the image from the CCD.  By subtracting two bias frames, you can remove the underlying differences in the pixel bias leaving just the noise added to the image when it was read from the CCD.  This subtraction of two bias frames is called a \u003cem\u003eRead Noise Frame\u003c\/em\u003e. \u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cimg src=\"http:\/\/telescopes.net\/store\/media\/wysiwyg\/QSI\/qsi_bias_frame.jpg\" alt=\"\"\u003eComplicating the story is that some types of noise are tougher to deal with than others.  For instance, truly random noise that displays a Gaussian distribution can be reduced by combining images.  The graph to the right shows the histogram of a bias frame from a QSI camera overlaid over histograms from two other cameras using the same Kodak CCD. The histograms have been normalized for easy visual comparison. The histogram from the QSI camera displays a nearly perfect Gaussian distribution. The familiar\u003cem\u003ebell curve\u003c\/em\u003e resembles a parabola when displayed with a log scale. Standard deviation (σ) is shown for each histogram.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eThe parabolic shape of the histogram is important but you can't infer too much about the magnitude of the noise from the width of a histogram without knowing more about the cameras. Differences in width can be caused by higher noise or possibly just differences in a camera's gain settings.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cstrong\u003eAveraging together multiple bias frames can tell you more about the distribution of pixel values and make it easier to visually identify any non-Gaussian noise in the images\u003c\/strong\u003e.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cimg src=\"http:\/\/telescopes.net\/store\/media\/wysiwyg\/QSI\/qsi_bias_frame_1.jpg\" alt=\"\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eTo the left is a histogram comparing the average of 10 bias frames from a QSI 520i to a camera from another manufacturer with the same sensor taken at the same -10C temperature. The graph has the same scale as the one above for the single bias frames.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eNote that both histograms are now narrower than the histograms for the single frames. This is a result of the noise being reduced in the combined frames because the random (Gaussian) noise tends to cancel out getting you closer to the \"true\" value of the underlying data. Also note however that the red histogram trails off to the right no longer resembling a parabola like the blue histogram from the QSI camera. This non-Gaussian noise typically has components of both pattern noise and stray pixels that fall outside the target Gaussian distribution. Pattern noise in particular \u003cem\u003ewill not be reduced\u003c\/em\u003e by combinging frames. Instead this type of noise combines just like signal reinforcing itself and reducing the signal to noise ratio in your final images.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cstrong\u003eBias frame histograms, however, can’t tell you the full story.  The width and shape of the histogram shows the magnitude and overall distribution of the noise, but it tells you little about the \u003cem\u003estructure\u003c\/em\u003e of that noise.  To do that requires another tool, the Fourier Transform\u003c\/strong\u003e.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eA Fourier Transform is a mathematical function that converts a \u003cem\u003esignal\u003c\/em\u003e (any signal) into a collection of sine waves which together exactly represent the original signal.  For images, we’re interested in 2-dimensional Fourier Transforms which convert an image from the \u003cem\u003eSpatial Domain\u003c\/em\u003e, rows and columns in a digital picture, into an equivalent \u003cem\u003eFrequency Domain\u003c\/em\u003e image. A Fast Fourier Transform (FFT) is a special algorithm that runs much faster on computers when starting with square images where each side has a length equal to a power of 2 (e.g 256, 512, 1024).\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cimg src=\"http:\/\/telescopes.net\/store\/media\/wysiwyg\/QSI\/qsi_read_noise.jpg\" alt=\"\"\u003eTo analyze the noise from a CCD camera, you create a Read Noise Frame as described above. By subtracting two bias frames, you end up with just the noise introduced by reading the image from the CCD. An FFT of that Read Noise Frame will reveal any pattern noise introduced by the camera. \u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cstrong\u003eAn FFT of random noise displaying a Gaussian distribution will have a smooth dark background with a single bright pixel in the center\u003c\/strong\u003e. To the left is an FFT of a Read Noise Frame from a QSI 500 Series camera. The FFT of the QSI Read noise frame reveals no pattern noise and is, in fact, virtually indistinguishable from an FFT of mathematically generated Gaussian noise.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eTo the right is the FFT of a Read Noise Frame from a camera that introduces non-Gaussian, periodic noise into the image.  Note the series of vertical lines running through the FFT and the three bright dots near the center.  Those vertical lines in the FFT are the result of horizontal noise of various frequencies in the original image.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cstrong\u003ePeriodic noise will \u003cem\u003enot\u003c\/em\u003e be reduced when combining multiple images; instead it is reinforced, just like signal. \u003c\/strong\u003eThe net effect of such noise is to raise the noise floor, reducing the signal to noise ratio and hiding the faint details in your images.  When many such images are combined, periodic noise may show up as visible patterns, such as faint horizontal or vertical lines, running through your images.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cem\u003eRoll your mouse over the image to the right to see an example from a camera that displays even stronger pattern noise\u003c\/em\u003e.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eThe images below of a standard optical target demonstrate one of the benefits of low noise and a Gaussian distribution.  The images were captured with a QSI 516 camera in a very dark room.  A single image closely resembles a bias frame. The target is virtually indistinguishable from the background.  Its Signal to Noise Ratio is nearly zero.  With an average combine of 50 frames, light and dark areas are clearly visible.  With 200 frames, the target pattern is easily identifiable.  Note that even after combining 200 frames, the difference between the \u003cem\u003edark\u003c\/em\u003e and \u003cem\u003ebright\u003c\/em\u003e pixels is only 0.45 ADUs on average.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cstrong\u003eLower noise displaying a Gaussian distribution allows you to reveal\u003cbr\u003esubtle details in your targets that would otherwise be lost\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003c!----\u003e","brand":"QSI","offers":[{"title":"Default Title","offer_id":47979689574659,"sku":"U2604-SB-QSI583wsg","price":175.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/90bcbf19-7409-4d25-9f6a-60fe18368239.jpg?v=1776905196"},{"product_id":"used-zwo-h-alpha-1-25-7nm-filter-2","title":"Used ZWO H-Alpha 1.25\" 7nm Filter","description":"\u003ch4\u003e\u003cspan style=\"font-family: -apple-system, BlinkMacSystemFont, 'San Francisco', 'Segoe UI', Roboto, 'Helvetica Neue', sans-serif; font-size: 0.875rem;\"\u003eCondition:\u003c\/span\u003e\u003c\/h4\u003e\n\u003cp\u003e\u003cspan style=\"font-family: -apple-system, BlinkMacSystemFont, 'San Francisco', 'Segoe UI', Roboto, 'Helvetica Neue', sans-serif; font-size: 0.875rem;\"\u003eThis is a used ZWO H-Alpha 1.25\" filter in excellent condition.  The optics and body are clean.  No box; comes in a ziploc bag.  \u003cmeta charset=\"utf-8\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eAny dust you see in the photos is easily removable - it seems that these filters develop an electrostatic charge such that the dust in the air is just attracted to the filter.  \u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan style=\"font-family: -apple-system, BlinkMacSystemFont, 'San Francisco', 'Segoe UI', Roboto, 'Helvetica Neue', sans-serif; font-size: 0.875rem;\"\u003e   \u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan style=\"font-family: -apple-system, BlinkMacSystemFont, 'San Francisco', 'Segoe UI', Roboto, 'Helvetica Neue', sans-serif; font-size: 0.875rem;\"\u003e    \u003c\/span\u003e\u003c\/p\u003e\n\u003ch4\u003e\u003cspan style=\"font-family: -apple-system, BlinkMacSystemFont, 'San Francisco', 'Segoe UI', Roboto, 'Helvetica Neue', sans-serif; font-size: 0.875rem;\"\u003eDescription:\u003c\/span\u003e\u003c\/h4\u003e\n\u003ch2\u003eZWO 1.25\" H-Alpha, SII, OIII 7nm Filter Set\u003c\/h2\u003e\n\u003cp\u003eNarrowband filters are a fantastic astrophotography tool when it comes to imaging during times of high light pollution. When all three filters, the H-alpha, SII, OIII filters, are used in unison, it is perfect for tricolor CCD astrophotography!\u003c\/p\u003e\n\u003cp\u003eWhile narrowband filters do not eliminate the effects of light pollution, they do enhance the contrast between celestial objects and the night sky. It provides this contrast by reducing the transmission of certain wavelengths of light. These wavelengths come from artificial light, mercury vapor and both high and low pressure sodium vapor lights, and natural light, such as skyglow caused by neutral oxygen emission in the atmosphere. Additionally, each filter is fine-optically polished to ensure an accurate 1\/4 wavefront.\u003c\/p\u003e\n\u003ch3\u003eZWO Narrowband 1.25\" Filter Set Specifications\u003c\/h3\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eFilter Size: 1.25″\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul\u003e\n\u003cli\u003eMechanical Thickness: 7.5mm (5mm + 2.5mm thread)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul\u003e\n\u003cli\u003eFWHM: 7±0.5nm\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul\u003e\u003c\/ul\u003e\n\u003cul\u003e\n\u003cli\u003eH-Alpha Transmission Rate: About 90% transmission\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul\u003e\n\u003cli\u003eInfrared wavelength cut-off: 700-1100nm\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul\u003e\n\u003cli\u003eTransmission of off-band: \u0026lt;0.1%, OD3(Optical Density)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch3\u003eZWO H-alpha 7nm Filter\u003c\/h3\u003e\n\u003cp\u003eZWO H-alpha 7nm filter has a bandpass of 7nm, and it passes light at 656nm wavelength. If you want high contrast astroimaging, then this Hα filter will deliver an excellent performance. The light transmission rate for the filter comes up to 80% and the glass has been fine-optically polished to ensure accurate 1\/4 wavefront. So, even in areas of strong light pollution, you can still explore the night sky with your imaging equipment!\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e","brand":"ZWO","offers":[{"title":"Default Title","offer_id":47991242981635,"sku":"U2604-RH-ZWO-HA-125","price":70.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/8dfd9a9c-b11c-41c2-90e0-5487a59e105e.jpg?v=1776987127"},{"product_id":"used-radian-triad-quad-band-narrowband-filter-2","title":"Used Radian Triad Quad-Band Narrowband Filter (2'')","description":"\u003cp\u003eThis is a 2\" Triad Quad-Band Filter in excellent condition.  It comes in its original jewel box.  \u003cmeta charset=\"utf-8\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eAny dust you see in the photos is removable - it seems that these filters develop an electrostatic charge such that the dust in the air is just attracted to the filter.  \u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan style=\"font-family: -apple-system, BlinkMacSystemFont, 'San Francisco', 'Segoe UI', Roboto, 'Helvetica Neue', sans-serif; font-size: 0.875rem;\"\u003e   \u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e  \u003c\/p\u003e\n\u003ch5\u003eDescription\u003c\/h5\u003e\n\u003cdiv class=\"page\" title=\"Page 2\"\u003e\n\u003cdiv class=\"section\"\u003e\n\u003cdiv class=\"layoutArea\"\u003e\n\u003cdiv class=\"column\"\u003e\n\u003cul\u003e\n\u003cli\u003eShoot in any light polluted area\u003c\/li\u003e\n\u003cli\u003eH-beta, OIII, H-alpha, and SII Band Passes\u003c\/li\u003e\n\u003cli\u003eWorks with any camera including DSLRs\u003c\/li\u003e\n\u003cli\u003eExceptional narrowband \u0026amp; luminance filter\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eIf your telescope is f\/3 or faster, you need the\u003cspan\u003e \u003c\/span\u003e\u003ca href=\"https:\/\/optcorp.com\/products\/radian-telescopes-pre-shifted-triad-ultra-2\" title='Radian Triad Ultra Narrowband Filter 2\"- For Fast Telescopes'\u003efast telescopes version here\u003c\/a\u003e\u003cmeta charset=\"utf-8\"\u003e \u003ca href=\"https:\/\/optcorp.com\/products\/radian-telescopes-pre-shifted-triad-ultra-2\" title='Radian Triad Ultra Narrowband Filter 2\"- For Fast Telescopes'\u003e\u003c\/a\u003e\u003c\/strong\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cul class=\"tab-list\"\u003e\n\u003cli id=\"description\"\u003e\n\u003cdiv class=\"description bottom clearfix\"\u003e\n\u003cdiv data-region=\"main\" data-shogun-variant-id=\"5e6bc15ee7b3c3004fb128f0\" data-shogun-platform-type=\"shopify\" data-shogun-page-version-id=\"5e6bc15ee7b3c3004fb128ec\" data-shogun-page-id=\"5e6bc15ee7b3c3004fb128ed\" data-shogun-site-id=\"bd1fd2cb-e6af-4d61-87c2-c0deac50e2c0\" data-shogun-id=\"5e6bc15ee7b3c3004fb128ed\" class=\"shogun-root\"\u003e\n\u003cdiv class=\"shg-c\" id=\"s-a62a7ac9-00e4-4376-9900-998ca96ff499\"\u003e\n\u003cdiv data-region=\"main\" data-shogun-variant-id=\"5e6bbfa15c3bbe00511a783f\" data-shogun-platform-type=\"shopify\" data-shogun-page-version-id=\"5e6bbfa15c3bbe00511a783b\" data-shogun-page-id=\"5e6bbfa15c3bbe00511a783c\" data-shogun-site-id=\"bd1fd2cb-e6af-4d61-87c2-c0deac50e2c0\" data-shogun-id=\"5e6bbfa15c3bbe00511a783c\" class=\"shogun-root\"\u003e\n\u003ch2\u003eUnmatched Multi-Narrowband Performance\u003c\/h2\u003e\n\u003cp\u003eThe Triad Ultra filter stands alone in its class as a filter with four ultra-narrow bandpasses that cover Hydrogen alpha, Hydrogen beta, Sulfur II, and Oxygen III wavelengths - the four most common wavelengths for narrowband astrophotography. As a multi-narrowband filter, the Triad Ultra is designed to photograph emission nebulae, planetary nebulae, and supernova remnants, and excels at doing so from light pollution. However, we recommend you try it from dark skies as well - the narrow bandpasses will give you tighter stars and more pronounced nebulosity.\u003c\/p\u003e\n\u003ctable class=\"center\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth\u003e\u003c\/th\u003e\n\u003cth\u003eHydrogen-beta\u003c\/th\u003e\n\u003cth\u003eOxygen III\u003c\/th\u003e\n\u003cth\u003eHydrogen-alpha\u003c\/th\u003e\n\u003cth\u003eSulfur II\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFWHM\u003c\/td\u003e\n\u003ctd\u003e5nm\u003c\/td\u003e\n\u003ctd\u003e4nm\u003c\/td\u003e\n\u003ctd\u003e4nm\u003c\/td\u003e\n\u003ctd\u003e4nm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePeak Transmission\u003c\/td\u003e\n\u003ctd\u003e79%\u003c\/td\u003e\n\u003ctd\u003e97%\u003c\/td\u003e\n\u003ctd\u003e87%\u003c\/td\u003e\n\u003ctd\u003e90%\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cbr\u003e\n\u003ch2\u003eUse Case for Monochrome Cameras\u003c\/h2\u003e\n\u003cp\u003eYou might think that the Triad Ultra is only designed for color cameras, but it actually works great on monochrome cameras too! A traditional luminance filter has a broad bandpass that lets light in from around 400 to 700nm. This works well for broadband imaging of galaxies and reflection nebulae, for example, but will be affected heavily by light pollution with such a broad bandpass. With the Triad Ultra, you can gather luminance data in all four major wavelengths while simultaneously cutting out light pollution and you get the added benefit of keeping the stars tight and small. Think of it as the ultimate luminance filter for your monochrome camera!\u003c\/p\u003e\n\u003ch2\u003eAmerican Made\u003c\/h2\u003e\n\u003ccenter\u003e\n\u003cp\u003e\u003cspan\u003eThe Triad Ultra is 100% American made and uses advanced multi-coatings and extreme tolerance glass, to ensure it is always consistent and accurate. Filter thickness is 3mm.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003eBelow you'll see an incredible image of the Rosette Nebula taken by\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eJason Guenzel\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eusing the Triad Ultra:\u003c\/p\u003e\n\u003cdiv\u003e\u003cimg alt=\"Jason Guenzel Nebula with RASA and Triad Ultra\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1594\/4815\/files\/Jason_Guenzel_-_NGC2238_-_The_Rosette_-_RASA8_Triad_Ultra_ASI533MC_600x600.jpg?v=1582742980\"\u003e\u003c\/div\u003e\n\u003cp\u003eThe Triad 2-inch filter is housed in a 7mm tall ring, with 5mm height above the threads. The ring wall thickness is between 1.3 and 2.58mm - depending on production batch. Please double check to make sure this will fit your filter wheel or accessories\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003eSpecifications\u003c\/p\u003e\n\u003c\/center\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"specs-table\"\u003e\n\u003ctable class=\"specifications\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd class=\"left\"\u003eFilter Shape\u003c\/td\u003e\n\u003ctd class=\"right\"\u003eRound\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"left\"\u003eFilter Thickness\u003c\/td\u003e\n\u003ctd class=\"right\"\u003e3mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"left\"\u003eFilter Type\u003c\/td\u003e\n\u003ctd class=\"right\"\u003eLight Pollution\/City Light Suppression\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"left\"\u003eFilter Type\u003c\/td\u003e\n\u003ctd class=\"right\"\u003eTriad\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"left\"\u003eFree Shipping\u003c\/td\u003e\n\u003ctd class=\"right\"\u003eYes\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"left\"\u003eSize\u003c\/td\u003e\n\u003ctd class=\"right\"\u003e2\"\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cdiv class=\"clearfix\"\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cp class=\"heading capitalize\"\u003eIncluded items\u003c\/p\u003e\n\u003cdiv class=\"section clearfix\"\u003e\n\u003cdiv class=\"description\"\u003e\n\u003cul\u003e\n\u003cli\u003e2-Inch Triad Ultra Quad-Band Filter\u003c\/li\u003e\n\u003cli\u003eFilter case\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"Radian","offers":[{"title":"Default Title","offer_id":48070620283139,"sku":"U2604-GF-RT-TRIAD-ULT2","price":600.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/cf93bc27-e3ef-4a44-aa64-84ae81e457c7.jpg?v=1778093630"},{"product_id":"used-meade-series-4000-1-25-plossl-eyepiece-and-filter-set-2","title":"Used Meade Series 4000 1.25” Plössl Eyepiece and Filter Set","description":"\u003cdiv\u003eThis is a used Meade Plossl eyepiece kit in excellent condition. \u003cmeta charset=\"utf-8\"\u003eThe glass is clean and clear, and the bodies of the eyepieces\/filters are unmarked.  It comes in its original foam-lined aluminum case and includes its original box.  \u003c\/div\u003e\n\u003cdiv\u003e\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cstrong\u003eAs a bonus\u003c\/strong\u003e, this includes a number of \u003cstrong\u003eadditional items\u003c\/strong\u003e: \u003c\/div\u003e\n\u003cul\u003e\u003c\/ul\u003e\n\u003cul\u003e\n\u003cli\u003eSIX Plossls instead of the usual 5:  6mm, 9mm, 9.7mm, 13mm, 18mm, and 32mm;\u003c\/li\u003e\n\u003cli\u003ethe Meade 2x Barlow;\u003c\/li\u003e\n\u003cli\u003eSIX colored filters instead of the usual 5:  Wratten numbers 8, 12, 23A, 58A, 38A, and 80A;\u003c\/li\u003e\n\u003cli\u003ean ND96 Moon Filter to reduce glare and increase clarity when observing the Moon.\u003cmeta charset=\"utf-8\"\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003eMeade Series 4000 Eyepiece and Filter Set #607001. Complete set of the most popular accessories for your Meade telescope. This comprehensive kit makes accessorizing a snap.\u003c\/p\u003e\n\u003cp\u003eIncludes SIX Meade Series 4000 Plossl Eyepieces in focal lengths of 6mm, 9mm, 9.7mm, 13mm, 18mm, and 32mm. All eyepieces feature a standard 1.25\" barrel size, with a 52° field of view (except for the 32mm - 49 degrees) and are of a 4-element design with premium optical glass. All additionally feature fully-coated optics for great contrast and light transmission. Each also features has a soft rubber eye guard for comfort. This complete kit additionally includes a Meade 2x Barlow lens to double the power of any of the included (or any other 1.25\") eyepieces.\u003c\/p\u003e\n\u003cp\u003eIn addition, this kit contains SIX colored filters: Wratten numbers \u003cmeta charset=\"utf-8\"\u003e8, 12, 23A, 58A, 38A, and 80A. There is also a Series 4000 ND96 Moon Filter to reduce glare and increase clarity when observing the Moon.\u003c\/p\u003e\n\u003cp\u003eFinally, all items come in a very nice aluminum carrying case to keep it all clean and organized. This is truly an instant observing kit, and represents an incredible value over buying even a few of the items individually.\u003c\/p\u003e","brand":"Meade","offers":[{"title":"Default Title","offer_id":48070963233027,"sku":"U2603-CP-607001","price":160.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/b1026247-666a-45d7-9799-74bbba5b678b.jpg?v=1778099905"},{"product_id":"used-generic-lunar-and-planetary-filter-set-1-26","title":"Used Generic Lunar and Planetary Filter Set, 1.25\" - 7 filters","description":"\u003ch4\u003eCondition:\u003c\/h4\u003e\n\u003cp\u003eThis is a set of generic lunar planetary filters in excellent condition with clean optics.  There is a total of 7 filters in this set:  82A, 56, 23A, 21, 12, a polarizing filter 3 (one piece), and a green lunar filter.  This includes a jewel case and cardboard sleeve for each filter except the green lunar filter, which comes in its own cardboard box.  \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch4\u003eDescription:\u003cmeta charset=\"utf-8\"\u003e \u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003eA nice beginner’s set of 1.25” planetary filters for any telescope.\u003c\/li\u003e\n\u003cli\u003eSee features on the Moon \u0026amp; planets in a whole new light.\u003c\/li\u003e\n\u003cli\u003eThe aluminum cell is threaded on top and bottom for stacking.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch5\u003eFeatures\u003c\/h5\u003e\n\u003cp\u003eColored filters can be used to bring out details on a planet’s surface or its cloud structure. All of the planetary filters included in the Celestron Lunar and Planetary Filter Set can be used on any 1.25” eyepiece with the proper filter threads, so they are very versatile. Just screw one onto the eyepiece of choice and slide it into the focuser.\u003c\/p\u003e\n\u003cp\u003eThis filter set includes the following colors:\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e23A Light Red\u003c\/strong\u003e - useful when observing Mercury and Venus during the day and at twilight and when observing Mars, Jupiter, and Saturn with telescopes 4\" in aperture and larger.  \u003cstrong\u003eMoon -\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eSomewhat useful for improving contrast between lunar features in scopes 8\" and larger.  \u003cstrong\u003eMercury -\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eImproves observations at twilight, when the planet is near the horizon. Reduces brightness of terrestrial sky to enhance daylight observing. \u003cstrong\u003eVenus -\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eReduces brightness of terrestrial sky in daylight observing, allowing occasional terminator deformations to be seen.  \u003cstrong\u003eMars -\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eFilters out scattered blue light in the Martian atmosphere to Increase the contrast and definition of polar caps, frost areas, low clouds, and dust storms against the ochre deserts, particularly when Mars is close to Earth's horizon, as the red light it passes is the least refracted by air currents in our atmosphere. Reduces light from blue and green areas which darkens the maria, oases, and canal markings, while lightening the orange-hued desert regions. Sharpens the boundaries of yellow dust clouds.  \u003cstrong\u003eJupiter -\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eBrings out structure in the belts and enhances festoons and polar regions.  \u003cstrong\u003eSaturn -\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eUseful on Saturn for studying the bluer cloud bands and polar regions.  \u003cstrong\u003eComets -\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eEnhances the definition of comet dust tails in 10\" and larger scopes.  \u003cstrong\u003e\u003c\/strong\u003e\u003cstrong\u003e25% transmission\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cmeta charset=\"utf-8\"\u003e\u003cstrong\u003e56 Light Green - Moon -\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eUseful for enhancing the contrast of lunar features in scopes 6\" and smaller. \u003cstrong\u003eVenus -\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eUseful for Venusian cloud pattern studies and to reduce the brightness of the terrestrial sky during daylight observing of Venus (an excellent time to observe this planet, as the high contrast of Venus against the dark night sky often makes for uncomfortable and unsatisfactory observing, while during the day the contrast range is not nearly as great, irradiation within your eye is reduced, and subtle Venusian features are sometimes more visible). \u003cstrong\u003eMars -\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eExcellent for increasing contrast of Martian polar caps and surface frosts with scopes 6\" and smaller. \u003cstrong\u003eJupiter -\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eIncreases the visibility of the Great Red Spot (which is more like a Faint Red Spot at the present time) with scopes 6\" and smaller. Useful for observing the low-contrast hues of red and blue visible in the Jovian atmosphere. Enhances white features in the planetary atmosphere. \u003cstrong\u003eSaturn -\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eEnhances white features in the planetary atmosphere. \u003cstrong\u003e53% transmission.  \u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe \u003cstrong\u003e#21 Orange filter\u003c\/strong\u003e sharpens the boundaries along the plains of Mars due to the reduction of blue\/green transmissions. Use on Jupiter and Saturn to enhance detail in the belts and polar regions.\u003c\/p\u003e\n\u003cp\u003e\u003cspan style=\"font-family: -apple-system, BlinkMacSystemFont, 'San Francisco', 'Segoe UI', Roboto, 'Helvetica Neue', sans-serif; font-size: 0.875rem;\"\u003eThe \u003c\/span\u003e\u003cstrong style=\"font-family: -apple-system, BlinkMacSystemFont, 'San Francisco', 'Segoe UI', Roboto, 'Helvetica Neue', sans-serif; font-size: 0.875rem;\"\u003e#12 Yellow Filter\u003c\/strong\u003e\u003cspan style=\"font-family: -apple-system, BlinkMacSystemFont, 'San Francisco', 'Segoe UI', Roboto, 'Helvetica Neue', sans-serif; font-size: 0.875rem;\"\u003e increases the contrast of blue and green areas on Mars, thus darkening the Maria, oases and canal markings, while lightening the orange-hued desert regions. It sharpens boundaries of yellow dust clouds and the blue clouds in the Martian atmosphere and is thus a favorite for viewing the red planet.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan style=\"font-family: -apple-system, BlinkMacSystemFont, 'San Francisco', 'Segoe UI', Roboto, 'Helvetica Neue', sans-serif; font-size: 0.875rem;\"\u003e\u003cmeta charset=\"utf-8\"\u003e \u003cspan data-subtree=\"aimfl,mfl\" data-processed=\"true\" data-copy-service-computed-style='font-family: \"Google Sans\", Roboto, Arial, sans-serif; font-size: 16px; font-weight: 400; margin: 0px; text-decoration: none solid rgb(10, 10, 10); border-bottom: 0px none rgb(10, 10, 10);'\u003eThe \u003cstrong\u003e#82A Light Blue filter \u003c\/strong\u003eenhances low-contrast details on the Moon, Mars, Jupiter, and Saturn without significantly dimming the image. It works by increasing contrast in atmospheric features and cloud belts and is often used by observers to highlight subtle surface details on Jupiter and Saturn.  \u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003eThis set also includes a filter labelled \"polarizing filter #3\" (which is one piece), and a filter labelled \"BG Moon Filter\", which is light green.  \u003c\/p\u003e\n\u003cp\u003e\u003cspan style=\"font-family: -apple-system, BlinkMacSystemFont, 'San Francisco', 'Segoe UI', Roboto, 'Helvetica Neue', sans-serif; font-size: 0.875rem;\"\u003e\u003cmeta charset=\"utf-8\"\u003eEach 1.25” filter has 26 mm of clear aperture, and is mounted in a black anodized aluminum cell that is threaded on both sides. Double threads allow the user to stack different filters together to create a custom color or affect the transmission percentage. Special coatings on each filter protect against reflections, ghosting, and scratches. A plastic case is included to keep your filters safe when not in use.\u003c\/span\u003e\u003c\/p\u003e","brand":"Generic","offers":[{"title":"Default Title","offer_id":48138151035139,"sku":"U2604-GM-LPFILTERSET","price":40.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/fdba4bba-715d-4fa7-9309-34d0b9d4781f.jpg?v=1778788085"},{"product_id":"used-generic-1-25-plossl-eyepiece-and-filter-set","title":"Used Generic 1.25” Plössl Eyepiece and Filter Set","description":"\u003cdiv\u003eThis is a generic Plossl eyepiece and filter kit in excellent condition.  \u003cmeta charset=\"utf-8\"\u003eIt is labelled as a CelticBird kit, but let's just call it a generic kit.  The glass is clean and clear, and the bodies of the eyepieces\/filters are unmarked.  It comes in its original foam-lined aluminum case.  \u003c\/div\u003e\n\u003cdiv\u003e\n\u003cstrong\u003e\u003c\/strong\u003e\u003cbr\u003e\n\u003c\/div\u003e\n\u003cdiv\u003eThis includes the following:  \u003c\/div\u003e\n\u003cul\u003e\n\u003cli\u003eFive Plossl eyepieces:  40mm, 20mm, 12.5mm, 8mm, 6mm;\u003c\/li\u003e\n\u003cli\u003ea 2x Barlow;\u003c\/li\u003e\n\u003cli\u003eFive colored filters:  Wratten numbers 12, 21, 23A, 56, and 82A;\u003c\/li\u003e\n\u003cli\u003ea Moon and Skyglow filter for helping to reduce the effects of light pollution; \u003c\/li\u003e\n\u003cli\u003eand an ND96 Moon Filter to reduce glare and increase clarity when observing the Moon.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eNormally, the Celestron version of this kit would cost $239.95.  This is almost TWO-THIRDS off!  Enjoy.  \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003eComplete set of the most popular accessories for your telescope. This comprehensive kit makes accessorizing a snap.\u003c\/p\u003e\n\u003cp\u003eIncludes FIVE Plossl Eyepieces in focal lengths of 6mm, 8mm, 12.5mm, 20mm, and 40mm. All eyepieces feature a standard 1.25\" barrel size, with a 52° field of view (except for the 40mm - 42 degrees) and are of a 4-element design with premium optical glass. All additionally feature fully-coated optics for great contrast and light transmission. Each also features has a soft rubber eye guard for comfort. This complete kit additionally includes a fully multi-coated 2x Barlow lens to double the power of any of the included (or any other 1.25\") eyepieces.\u003c\/p\u003e\n\u003cp\u003eIn addition, this kit contains FIVE colored filters: Wratten numbers 12, 21, 23A, 56, and 82A. There is also a Series 4000 ND96 Moon Filter to reduce glare and increase clarity when observing the Moon, as well as a Moon \u0026amp; SkyGlow filter for reducing the effects of light pollution on your observing.\u003c\/p\u003e\n\u003cp\u003eFinally, all items come in a very nice aluminum carrying case to keep it all clean and organized. This is truly an instant observing kit, and represents an incredible value over buying even a few of the items individually.\u003c\/p\u003e","brand":"Generic","offers":[{"title":"Default Title","offer_id":48258870935811,"sku":"U2605-CD-607001","price":100.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/ddabd516-a4f0-4bb2-b4b7-0a1b6a3ec07b.jpg?v=1779834694"},{"product_id":"used-baader-1-25-lrgb-filter-set","title":"Used Baader 1.25\" LRGB Filter Set","description":"\u003cp\u003eThis is a used Baader 1.25\" LRGB filter set in excellent condition. All of the optics are clean and so are the bodies. Each comes in their own jewel case. The Baader luminance filter is their UV\/IR cut filter and it is not in its original jewel case. \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch2\u003eBaader 1.25\" CMOS Optimized LRGB Filter Set\u003c\/h2\u003e\n\u003cp\u003eAstro-imaging with modern CMOS cameras using Baader 1.25\" LRGB Bandpass color filters is achievable for nearly all telescopes independent of optical speed. In fact, these filters are compatible with any telescope that has a focal ratio between f\/15 and f\/1.8. Notable features include a balanced design, steep slopes at all transmission curves, blackened lens edges with telescope-sided black outer rim around the entire circumference. Highly coveted 1:1:1 subframe exposures, a must for automated imaging, are realized due to this filter's balanced design. Remarkably low levels of stray light and reflections, as well as peak color contrast that matches regular CMOS QE and s\/n ratio, are both attainable through steep transmission curve slopes. Finally, unwanted reflections are lessened even further thanks to blackened lens edges with black outer rim on the telescope side that serve as a filter-lead-side-indicator.\u003c\/p\u003e\n\u003cp\u003eEnjoy 98% transmittance for emissions within the visual spectrum (420 nm to 685 nm) along with the simultaneous complete restriction of any UV or IR light on the outskirts of this range with the CMOS optimized Luminance “L” filter from the Baader LRGB filter set. This includes potentially damaging thermal radiation in the infrared. Astrophotographers using red-sensitive digital, CCD, or CMOS cameras will greatly appreciate the sharper star images they are able to obtain thanks to this filter.\u003c\/p\u003e\n\u003cp\u003eThe majority of filters available from other manufacturers, especially those of the more moderately priced variety, are cut from a larger glass plate. As a result, they form micro-cracks around all edges that make them vulnerable to depreciation through the moisture accumulation, thus causing premature aging. This is not the case, however, with these 1.25\" LRGB filters from Baader. Each individual filter in this set contains scratch-resistant Reflex-Blocker™ hard coatings as well as Life-Coat™ sealed coating edges to insulate them from the external environment. The quality of these filters will not diminish no matter how many times you clean them or how long you own them. Filter thickness matches current standards with particular concern for parfocality.\u003c\/p\u003e\n\u003ch3\u003eBaader CMOS Optimized LRGB Filter Set Highlights\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eCMOS optimized 1.25\" LRGB (Luminance\/Red\/Green\/Blue) Bandpass Filter Set from Baader designed for use with between f\/15 and f\/1.8 focal ratio telescopes.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul\u003e\n\u003cli\u003eBoth stray light and reflections are minimized to a previously unthinkable level via the exceptionally high transmittance of each filter's individual color channel.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul\u003e\n\u003cli\u003eBalanced 1:1:1 subframe exposures, vitally important for performing automated imaging tasks, can be captured by using these filters.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul\u003e\n\u003cli\u003eTransmission curves on all three color filters have steep slopes to increase contrast.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul\u003e\n\u003cli\u003eSeparately coated rather than carved out of a larger glass plate, these Baader LRGB filters are all planeoptically polished with Reflex-Blocker™ hard coatings and Life-Coat™ sealed coating edges.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul\u003e\n\u003cli\u003eThese parfocal filters meet the current standards for filter thickness.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul\u003e\n\u003cli\u003eThe entire circumference contains blackened edges with black outer rim on the telescope side that acts as a filter-lead-side-indicator to prevent reflections resulting from light emissions spilling onto the edge of the filter.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul\u003e\n\u003cli\u003eLuminance \"L\" filters allow up to 98% transmission of visible light (420 to 685 nm) while completely cutting off any emissions from the UV or IR ends of the spectrum, including dangerous thermal radiation in the infrared.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul\u003e\n\u003cli\u003eUsing the \"L\" filter with red-sensitive digital and CMOS\/CCD cameras makes stars seem a lot less blurry.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul\u003e\n\u003cli\u003eUsing the \"B\" and \"G\" filters together doubles the energy emitted from the O-III line, leading to the utmost peak transmission for the best possible deep sky S\/N yield.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul\u003e\n\u003cli\u003eSimultaneously suppress infrared and near infrared emissions from 680 nm up to 1200 nm, while enhancing light from H-Alpha and SII emitting objects with the \"R\" filter.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul\u003e\n\u003cli\u003eSources of inconvenient light, such as that from Mercury and Sodium vapor street lamps at 580 nm, are totally neutralized via the use of \"G\" and \"R\" filters, resulting in a darker background sky and color balance and separation that is without equal.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul\u003e\n\u003cli\u003eSuitable for use with older CCD cameras despite being designed specifically with modern CMOS technology in mind.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eAbout the Luminance \"L\" Filter\u003c\/h3\u003e\n\u003cp\u003eThe obstruction of UV and IR light originating from the extreme non-visible ends of the spectrum is the main purpose of the Baader Luminance \"L\" Filter. This includes complete blockage of damaging thermal radiation in the infrared, as well as the prevention of blurry stars when working with digital or CCD\/CMOS red-sensitive cameras. Meanwhile, all visible spectral areas between 420 nm and 685 nm are allowed to pass at a 98% transmission rate.\u003c\/p\u003e\n\u003ch3\u003eAbout the Red \"R\" Filter\u003c\/h3\u003e\n\u003cp\u003eWith the Red \"R\" Filter, only transmissions from 595 nm to 690 nm wavelengths are permitted to pass, including those of deep sky objects in the H-Alpha line. While there is an intentional overlap between the \"G\" and \"B\" filters in terms of spectral emissions allowed to pass, a purposeful gap between the shortest part of the \"R\" region and the longest part of the \"G\" region results in the exclusion of a wide range of unwanted light emissions from street lamps and other terrestrial sources. Red \"R\" filters fully obstruct the NIR and IR from 680 nm up to 1200 nm while keeping maximum transmission of H-Alpha and SII emissions extremely high.\u003c\/p\u003e\n\u003ch3\u003eAbout the Green \"G\" Filter\u003c\/h3\u003e\n\u003cp\u003eBest suited for imaging O-III emission line objects using CMOS monochrome cameras, Green \"G\" filters transmit wavelengths between 490 nm and 580 nm. Despite the previously mentioned \"G\" and \"B\" filter overlap, the crucial H-Beta and O-III emission lines are clearly independent from one another. Although there are no critically important emission lines to be found in the vicinity of 580 nm, Mercury and Sodium vapor street lights do emit from this region. However, thanks to Baader's RGB filter design, these unfavorable emissions are cut off almost entirely, resulting in a darker sky background as well as better color balance and separation.\u003c\/p\u003e\n\u003ch3\u003eAbout the Blue \"B\" Filter\u003c\/h3\u003e\n\u003cp\u003eOf the three Baader RGB filters, The Blue \"B\" Filter allows the transmittance of the shortest wavelengths (400 nm to 510 nm). This is especially useful for applications involving objects emitting from the H-Beta line (486 nm) such as the Horsehead nebula. Like the \"G\" filter, the \"B\" filter also passes O-III emissions (501 nm). When used in combination, these two filters provide double the O-III line energy for unmatched deep sky S\/N via extremely high peak transmission.\u003c\/p\u003e","brand":"Baader","offers":[{"title":"Default Title","offer_id":48431587393795,"sku":"U2606-MK-Baad-LRGB","price":125.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/original-720.jpg?v=1781725474"},{"product_id":"used-baader-1-25-sho-narrowband-filter-set-sii-ha-oiii-7-8-5-nm","title":"Used Baader 1.25\" SHO Narrowband Filter Set (SII\/Ha\/OIII) 7-8.5 nm","description":"\u003cp\u003eThis is a used Baader 1.25\" SHO narrowband filter set in excellent condition. All of the optics are clean and bodies are unmarked. Includes their original jewel cases. \u003c\/p\u003e\n\u003cp\u003eSII: 8nm \u003c\/p\u003e\n\u003cp\u003eHa: 7nm \u003c\/p\u003e\n\u003cp\u003eOIII: 8.5nm \u003c\/p\u003e\n\u003cp\u003eCCD imagers will find Baader's Premium Narrowband CCD passfilters to deliver the absolute highest contrast deep sky images in H-Alpha, H-Beta, Oxygen III, and Sulfur-II, with the shortest exposures possible. Their ultra-narrow bandwidths have extremely high transmissions, while completely rejecting light pollution as well as the important blocking of longer wavelengths.\u003c\/p\u003e\n\u003cp\u003eThe high optical quality of the Baader narrowband filters guarantees no loss in sharpness or contrast. Each substrate is fine-optically polished plane parallel to deliver a smooth and accurate 1\/4 wavefront over the entire surface. This special custom polishing operation sets Baader filters apart from the standard commercially precision polished filter substrates used by most other filter manufacturers.\u003c\/p\u003e\n\u003cp\u003eIn addition to their transmission properties, the Baader coatings were developed with another key goal in mind - eliminate the annoying reflections present in other narrowband astro-filters. To achieve this freedom from reflections, along with excellent out of band blocking, required careful design and testing of the coating stacks.\u003c\/p\u003e\n\u003cp\u003eCoatings are professionally applied in Germany by the most sophisticated equipment available today, ensuring high consistency for bandpass centering, transmission, and out of band blocking. The anti-reflection coatings are designed to prevent halos and balanced to prevent physical deformation of the optically flat substrates. The ultra-hard ionbeam deposition ensures the coatings will never degrade from use or normal cleaning. Each filter is coated individually, permanently sealing the coating edges, in order to guarantee lifetime coating durability and uniformity. Baader mil-spec coatings won't degrade, peel or flake off, unlike the coatings of filters that have been simply cut out of pre-coated sheets of glass. This cutting operation leaves the coating edges rough and torn which enables penetration of moisture between the coatings and substrate.\u003c\/p\u003e","brand":"Baader","offers":[{"title":"Default Title","offer_id":48431706571011,"sku":"U2606-MK-Baad-SHO","price":250.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/original-729.jpg?v=1781726038"},{"product_id":"used-baader-solar-continuum-filter-1-25-10nm","title":"Used Baader Solar Continuum Filter 1.25\" 10nm","description":"\u003cp\u003eThis is a used Baader solar continuum filter 10 nm in good condition. The optics are a little scratched and the body is unmarked which can be seen in the provided photos. This includes the original jewel case. \u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eNote: \u003c\/strong\u003eThe 10 nm filter is an older version that has now been superseded by the 7.5 nm filter which is what is described below. \u003c\/p\u003e\n\u003cdiv class=\"text-2xl text-darkBlue font-bold mb-5 s1600:text-xl\"\u003eKey Features\u003c\/div\u003e\n\u003cul\u003e\n\u003cli\u003e7.5 nm Solar Continuum 2\" Filter, CWL 540nm with 2\" screw-in thread\u003c\/li\u003e\n\u003cli\u003eA must for owners of achromatic refractors. This narrowband-filter cuts the spectral range where lens optics draw sharpest and contrastiest. The Solar Continuum Filter brings power back to you.\u003c\/li\u003e\n\u003cli\u003eEnhances contrast and reduces the effect of atmospheric turbulence (in combination with white light solar filters)\u003c\/li\u003e\n\u003cli\u003eEnormous contrast gain in monochrome photography even on pure color systems\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eImportant note:\u003c\/strong\u003e The Solar Continuum Filter must be used for purely VISUAL solar observation ONLY with additional filtering (e.g. Baader Herschel prism or AstroSolar Safety Film) \u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eThe Solar Continuum Filter is practically a narrow band photosphere filter for solar observation in white light. It provides the highest contrast in the photosphere of the sun. The filter works as a monochromator: suppressing the effects of the atmospheric turbulence and delivering images that are significantly sharper.\u003c\/p\u003e\n\u003cp\u003eLens systems - including those of apochromats, catadiopters or eyepieces - are traditionally optimized for the spectral range around 540nm, since this is where our eye has the highest sensitivity. This narrowband filter therefore blocks everthing with the exception of the spectral range in which a lens optic works most sharply and with the highest contrast. The effect is greatest on achromatic lens telescopes; but there is also an effect on apochromatic telescopes, catadioptric systems, and even pure mirror systems by reducing air turbulence.\u003c\/p\u003e\n\u003cp\u003eAs a monochromatic filter, it is ideal for use on monochromatic cameras and can even provide a tremendous gain on pure color systems.\u003c\/p\u003e\n\u003cp\u003eWith a colour camera, as with deep-sky narrow-band photography, it is less effective as only the green pixels are used. Thus, although you still benefit from the improved image sharpness of the telescope that is optimised for green wavelengths (and the reduction of the influences of air turbulence), with a colour camera you cannot fully exploit the better image quality compared to monochrome cameras, as you are effectively working with reduced camera resolution.\u003c\/p\u003e\n\u003cp\u003eCompared to the previous model with a 10nm half-band-width, this filter has a half-band-width of only 7.5nm, which increases the contrast even more. It thus replaces both the previous Baader 10nm Solar Continuum filter and the stacked 1 ¼\" filter #2458392. The single filter is so good that stacking is no longer necessary - the contrast gain of a single 7.5nm filter makes stacking unnecessary, and this performance is now also available in 2\".\u003c\/p\u003e\n\u003cp\u003eThe Baader 7.5 nm Solar Continuum also offers all the advantages of the CMOS-optimized Baader filters:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eIncreased contrast, matched for typical CMOS quantum efficiency and s\/n ratio\u003c\/li\u003e\n\u003cli\u003eReflex-Blocker™ coatings, for largest ever freedom from halos, even under most adverse conditions concerning aux-optics\u003c\/li\u003e\n\u003cli\u003eIdentical filter thickness to existing standards, with utmost care for parfocality\u003c\/li\u003e\n\u003cli\u003eBlackened edges all around, with filter-lead-side-indicator in the form of a black frontside outer rim, to additionally eliminate any reflection due to light falling onto the edge of a filter\u003c\/li\u003e\n\u003cli\u003eEach filter coated individually, with sealed coating edge (NOT cut out of a larger plate with coatings left exposed)\u003c\/li\u003e\n\u003cli\u003eLife-Coat™: evermore hard coatings to enable a non-aging coating for life – even in a most adverse environment\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eSpecifications:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eManufacturer: Baader Planetarium\u003c\/li\u003e\n\u003cli\u003eNet Weight (kg): 0.067\u003c\/li\u003e\n\u003cli\u003eTransmission Range: 535 – 545 nm\u003c\/li\u003e\n\u003cli\u003eFilter Thickness (Without cell): 2 mm\u003c\/li\u003e\n\u003cli\u003eHBW (Halfbandwith): 7.5 nm\u003c\/li\u003e\n\u003cli\u003eCWL (Central Wavelength): 540 nm\u003c\/li\u003e\n\u003cli\u003eAR-Coating: Reflex-Blocker™ hard coated, planeoptically polished\u003c\/li\u003e\n\u003cli\u003eFilter Size: 2 inch\u003c\/li\u003e\n\u003cli\u003eFilter Usage: CMOS, Contrast Enhancement, Solar\u003c\/li\u003e\n\u003cli\u003eFilter Mounted: Mounted (LPFC 6mm)\u003c\/li\u003e\n\u003cli\u003eType of Filter: Narrowband\u003c\/li\u003e\n\u003cli\u003eSingle or Set: Single Filter\u003c\/li\u003e\n\u003cli\u003eFilter Shape: round\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eManufacturer part number: 2961581 or FSOL-2N\u003c\/p\u003e","brand":"Baader","offers":[{"title":"Default Title","offer_id":48431932768515,"sku":"U2606-MK-Baad-Solar","price":60.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/original-736.jpg?v=1781729539"},{"product_id":"like-new-zwo-lrgb-filters-1-25","title":"Like New ZWO 31mm Unmounted LRGB Filters","description":"\u003cp class=\"has-luminous-vivid-amber-color has-text-color wp-block-heading\"\u003e\u003cspan\u003eThis is a like new set of 31mm unmounted ZWO LRGB filters in excellent condition, completely clean, and unopened.  Comes in its original jewel case and no box.  \u003c\/span\u003e\u003c\/p\u003e\n\u003ch1 class=\"has-luminous-vivid-amber-color has-text-color wp-block-heading\"\u003e\u003cspan\u003e\u003c\/span\u003e\u003c\/h1\u003e\n\u003cdiv class=\"text-2xl text-darkBlue font-bold mb-5 s1600:text-xl\"\u003eKey Features\u003c\/div\u003e\n\u003cdiv class=\"value\"\u003e\n\u003cdiv class=\"product attribute short_description\"\u003e\n\u003cdiv class=\"value\"\u003e\n\u003cul\u003e\n\u003cli\u003ePremium 31mm unmounted round LRGB filter set for use with monochrome astronomy cameras\u003c\/li\u003e\n\u003cli\u003ePrecision passbands partially block light pollution from sodium lamps while passing OIII emission from nebulae for a more natural image color\u003c\/li\u003e\n\u003cli\u003eIR blocking from 700nm to 1100nm to eliminate need for a separate IR-cut filter \u0026gt;92% transmittance, polished to ¼-wave, and fully multicoated to ensure optimum images\u003c\/li\u003e\n\u003cli\u003eIdeal for use in ZWO manual and electronic filter wheels \u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003eThe ZWO LRGB-31 Filter Set includes four unmounted 31mm round astrophotography filters that pass red, green, and blue bands of light as well the full luminance spectrum across the visible band. By taking individual images with each of these filters and a monochrome astronomy camera and combining the separate images with standard processing techniques, you can create beautiful correct-color images of planets and deep-sky objects.\u003c\/p\u003e\n\u003cp\u003eThis premium filter set is designed to approximately equalize the sensor response of the ASI1600 monochrome camera, and the RGB color combination is weighted to approximately 1:1:1 for accurate color rendering. The ZWO LRGB-31 filter set is ideal for use in the ZWO EFW Mini or EFW8 electronic filter wheels with monochrome ZWO cameras.\u003c\/p\u003e\n\u003cp\u003eThe precision passbands of the LRGB filters include a gap between red and green to improve color balance and partially block the sodium line at 589nm to suppress light pollution from low and high pressure sodium lamps. The blue and green filter passbands overlap slightly to include emission from OIII to help achieve a more natural color when imaging nebulae. The ZWO LRGB filters also block infrared wavelengths from 700nm to 1100nm which means a separate IR-cut filter is not required. Each filter has a transmittance of at least 92% in band, and each is optically polished to ¼ wave to help you get superior images. All surfaces have multi-layer antireflection coatings for increased transmittance and elimination of ghost reflections. The filters have a thickness of 1.9mm.\u003c\/p\u003e\n\u003cp\u003eThis set is not suitable for imaging with DSLRs or one-shot color astronomy cameras because they include a Bayer array to achieve color images intrinsically.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"ZWO","offers":[{"title":"Default Title","offer_id":48432276308227,"sku":"LN2606-RM-ZWO-LRGB31mm","price":125.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/original-748.jpg?v=1781733702"},{"product_id":"used-astrozap-baader-astrosolar-filter","title":"Used Astrozap Baader AstroSolar Filter","description":"\u003cp\u003eThis is a used 259mm-269mm AstroSolar filter in good condition. The foil is intact, and includes a cardboard Bahtinov mask. \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ccenter\u003e\n\u003ch2\u003eAstroZap Baader Solar Filter for 259 mm - 269 mm OD Telescopes\u003c\/h2\u003e\n\u003c\/center\u003e\n\u003cul\u003e\n\u003cli\u003eAstroSolar has been thoroughly tested for eye safety and has been approved by the National Bureau of Standards in Germany.\u003c\/li\u003e\n\u003cli\u003eAstroSolar is essentially free from pinholes.\u003c\/li\u003e\n\u003cli\u003eAstroSolar is constructed of lightweight 18Ga aluminum and powder coated white.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eThis specific solar filter fits telescopes with an outside diameter between 259 mm and 269 mm.\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eBaader AstroSolar is unlike any other solar filter on the market! The sun appears in neutral white when using AstroSolar providing and exceptional observing experience. Other films and some glass filters produce blurry reddish or bluish Solar images which in turn cuts part of the spectrum. Faculae regions, which are visible mostly in the blue wing of the spectrum, are very hard to see with an orange sun. Because of the neutral color balance of AstroSolar, you can use various color (or interference) filters. This allows observers to focus on certain spectral passbands for investigations of different layers within the solar \"atmosphere\".\u003c\/p\u003e\n\u003cp\u003eThe uniqueness of Baader AstroSolar is not only in its ability to observe the sun using one of the best filters out there but also because of the dedication in making it one of the safest filters around. All processes in correlation to this product have been carefully tested and coatings are continuously inspected for consistency to ensure your eye safety. Further more, the National Bureau of Standards in Germany, the PTB has approved Baader AstroSolar for eye safety.\u003c\/p\u003e\n\u003cp\u003eAstroSolar is essentially free from pinholes. Because of the coating on both sides, the probability of two pinholes overlapping each other is tremendously faint. There can be a time when pinholes do appear but to 1 out of 1000 only in optical density 2.5! Baader AstroSolar film Filter cell is constructed of lightweight 18Ga. aluminum and powder coated white. To ensure a secure fit, the Filter cell has heavy duty threaded inserts and nylon thumbscrews.\u003c\/p\u003e\n\u003ccenter\u003e\n\u003ch2\u003eWhat About Your Finderscope?\u003c\/h2\u003e\n\u003c\/center\u003e\n\u003cp\u003eAdding this solar filter to your telescope will adequately filter the light coming through your focuser, but have you considered what you’ll do about your finder scope?\u003c\/p\u003e\n\u003cp\u003eHere are some suggestions for dealing with your finder that will assure you do not damage your eyes (or anyone else’s) by looking at the Sun through your telescope’s unfiltered finder:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eRemove Your Finder.\u003c\/strong\u003e Ditching your finderscope when solar viewing will remove the possibility of someone accidentally looking through it to spot the Sun. Of course, not having a finder makes centering the Sun in your eyepiece more difficult, but with practice, it can be done. Set the mount down so the telescope is pointing in the direction of the Sun. Put the main solar filter on so you can check your progress, and then move the telescope around until it casts a shadow that produces a nice, sharp silhouette of the scope. The OTA will look circular. Now move your telescope up or down with your hand controller, slow motion controls, or very carefully by hand if required while looking through the eyepiece. You will not get a warning when you are close, but you should be able to align with the Sun using this method. Practice ahead of time before any big event, like an eclipse, to make sure you’ve got the process down.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFilter Your Optical Finder.\u003c\/strong\u003e \u003cem\u003eThis solution is not recommended for a reflex or red dot finder since it is too easy to accidentally look around the window. If you have one of these finders we recommend you either remove it or replace it with a dedicated solar finder (see below).\u003c\/em\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003eTo make your optical finderscope safe for solar viewing you’ll need to buy a piece of \u003ca href=\"https:\/\/www.highpointscientific.com\/search?q=solar+film\" target=\"_blank\"\u003eBaader Solar Film for Visual Use\u003c\/a\u003e. This film comes in different size sheets and cuts easily with scissors, allowing you to make your own filter. You can go super low-tech and use a rubber band to hold a piece of the film firmly around the finder or you can get fancy and build your own slip-on solar filter. However you attach the solar film, you need to make sure there are no light leaks at all and that it doesn’t accidentally fall off when you move your telescope around. Any unused film can store flat between two pieces of cardboard and will keep for years. It is nice to have around, just in case of a solar emergency :-)\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBuy a Dedicated Solar Finder.\u003c\/strong\u003e Check out the \u003ca href=\"https:\/\/www.highpointscientific.com\/tele-vue-sol-searcher-solar-finder-ssf-1006\" target=\"_blank\"\u003eTele Vue Sol-Searcher Solar Finder\u003c\/a\u003e. This special finder can only be used when observing the Sun, but it works very well. The Sol-Searcher is reasonably priced and can be attached to your telescope with Velcro or with #10-32 screws (user supplied).\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Astrozap","offers":[{"title":"Default Title","offer_id":48432430317827,"sku":"U2606-MK-AZP-AZ1005","price":50.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/original-749.jpg?v=1781738151"},{"product_id":"used-optolong-l-pro-light-pollution-broadband-filter-9","title":"Used Optolong L-Pro Light Pollution Broadband Filter 2\"","description":"\u003cp\u003e\u003cstrong\u003eCondition\u003c\/strong\u003e:\u003c\/p\u003e\n\u003cp\u003eThis is a used Optolong 2\" L-Pro filter in excellent condition. There are no sleeks, dings, or marks, and the optics are completely clean. It comes in its original jewel case and box.\u003c\/p\u003e\n\u003cp\u003e\u003cem\u003e(Any dust you see in the photos is easily removable - it seems that these filters develop an electrostatic charge such that the dust in the air is just attracted to the filter.)  \u003c\/em\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch5\u003eDescription\u003c\/h5\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eThe L-Pro (L-Professional) filter is the \u003c\/span\u003e\u003cspan\u003ebest light pollution filter with multi-bandpass filter which offers better color balance by maximizing the transmission band b\u003c\/span\u003e\u003cspan\u003ey selectively reducing the transmission of wavelengths of light pollutants.  Specifically, those produced by artificial lighting, including mercury vapor lamps, both high \u0026amp; low pressure sodium vapor lights and the unwanted natural light caused by neutral oxygen emission in our atmosphere (i.e. skyglow).\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eThe L-Pro filter enhances highly transparent main nebula emission lines at OIII (496nm and 500nm), H-beta (486nm), NII (654nm and 658nm). It enhances the contrast and details \u003c\/span\u003efor both visual and photographic purposes in areas with heavy light pollution.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhich to Choose?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eL-Pro provides the broadest spectrum and most natural color. Suitable for imaging nebula, galaxy, star cluster, and comet targets.\u003c\/li\u003e\n\u003cli\u003eUHC is not as broad spectrum, less natural color, but will block more stray light and skyglow than the L-Pro. Best suited to nebula targets, not broad spectrum targets like galaxies, clusters, or comets.\u003c\/li\u003e\n\u003cli\u003eL-Enhance is a narrow tri-band filter. Best suited to capturing dim nebula targets. Will decrease brightness of surrounding stars, allowing for more faint detail. \u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eIf you plan to use the filter to image a wide range of targets, the L-Pro is the most versatile. The L-Enhance will provide the most faint detail on emission nebula, and the UHC is a budget option in the middle.\u003c\/p\u003e\n\u003cp\u003e\u003cspan style=\"color: #ff2a00;\"\u003e\u003cstrong\u003eIMPORTANT Limitation of the EOS-R Filter\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eDue to the particularity of Canon R series micro-single optical path, aperture design and light incident Angle, slight dark angle interference will occur when using an interference filter such as the L-Pro clip filter for imaging. \u003c\/span\u003e\u003cbr\u003e\u003cspan\u003eThere are two solutions to solve peripheral interference phenomenon： 1. Cut out the interference areas of picture. 2.By post processing via RAW (video tutorials: \u003c\/span\u003e\u003ca href=\"https:\/\/youtu.be\/aDqCN5lu9PM\"\u003ehttps:\/\/youtu.be\/aDqCN5lu9PM\u003c\/a\u003e\u003cspan\u003e).\u003c\/span\u003e\u003c\/p\u003e\n\u003ch5\u003eSpecifications\u003c\/h5\u003e\n\u003cp\u003e\u003cstrong\u003eTechnical Data\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eTpeak: T\u0026gt;90%\u003c\/li\u003e\n\u003cli\u003eSpectrum: 380-750nm\u003c\/li\u003e\n\u003cli\u003eOptical Density:  Light pollution emission is blocked 90%\u003c\/li\u003e\n\u003cli\u003eSurface Quality: 60\/40\u003c\/li\u003e\n\u003cli\u003eTransmitted Wavefront RMS: 1\/4\u003c\/li\u003e\n\u003cli\u003eParallelism (arcsec): 30s\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cstrong\u003eTechnical Data\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eSchott substrate material\u003c\/li\u003e\n\u003cli\u003eThickness 2.0mm\u003c\/li\u003e\n\u003cli\u003eSurface Quality: 60\/40 (Refer to MIL-O-13830)\u003c\/li\u003e\n\u003cli\u003eOptically polished to ensure accurate 1\/4 wavefront and \u0026lt;30 seconds parallelism over the both surfaces\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eCoating Parameter\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eNon-cemented optical substrate coating\u003c\/li\u003e\n\u003cli\u003eElectron-beam gun evaporation with Ion-assisted deposition coating technology for durability and resistance to scratching, as well as stability on CWL (central wavelength); no deviation affected by temperature change\u003c\/li\u003e\n\u003cli\u003ePlanetary rotation system offers precision and homogeneity of coatings ensuring high value on transmission of pass-band and Optical density of off-band\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cbr\u003e\u003cstrong\u003eFilter Cell\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eUltra-thin filter cell minimizes vignetting by maximizing possible clear aperture (clear aperture is 26mm for 1.25”; 45mm for 2”)\u003c\/li\u003e\n\u003cli\u003eAerometal Material\u003c\/li\u003e\n\u003cli\u003ePrecise CNC Machining\u003c\/li\u003e\n\u003cli\u003eSand Blasting Process\u003c\/li\u003e\n\u003cli\u003eBlack Anodized Finish\u003c\/li\u003e\n\u003cli\u003eExtinction Treatment to Prevent Reflection\u003c\/li\u003e\n\u003cli\u003eLaser Engraving No Fading\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003ePackage\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003ePlastic PP Case\u003c\/li\u003e\n\u003cli\u003eImported High Pressure EVA Case Lining\u003c\/li\u003e\n\u003cli\u003eSilver Cardboard Box\u003c\/li\u003e\n\u003cli\u003eHigh Density Sponge Carton Lining\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eSizes\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eStandard 1.25”\u003c\/li\u003e\n\u003cli\u003eStandard 2”\u003c\/li\u003e\n\u003cli\u003eClip Filters for crop sensors and full frame sensors\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Optolong","offers":[{"title":"Default Title","offer_id":48441790628099,"sku":"U2606-BB-10202","price":125.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/8fdcd7ea-3aaa-4acd-8c43-ccb43b3923ab.jpg?v=1781985168"},{"product_id":"used-vaonis-vespera-dual-band-filter-3","title":"Used Vaonis Vespera Dual-Band Filter","description":"\u003cp\u003e\u003cmeta charset=\"utf-8\"\u003eThis is a Vespera Dual-Band filter from a trade-in of a Vespera.  It is in only \u003cspan style=\"text-decoration: underline;\"\u003efair to good\u003c\/span\u003e condition, as it does have some significant spotting and dust that we can't seem to remove.  See the photos. We have taken this issue condition into account in the pricing.  You save \u003cstrong\u003eHALF OFF\u003c\/strong\u003e the new price!    \u003c\/p\u003e\n\u003cp\u003eIt comes in a jewel case (not its original) but does not include a box.  \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003eThe Vespera Dual Band Filter is a dual narrowband interference filter that will significantly improve your photo quality whether you are viewing from an urban or natural environment.\u003c\/p\u003e\n\u003cp\u003eBy selecting very precisely the wavelengths of Hydrogen Alpha (H-alpha) and Oxygen III (O-III), found mainly in nebulae, the filter will increase the contrast between the Stellar object and the sky background. Thus, its use makes it possible to obtain a higher-quality image, with sharper stars and finer details.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eSignificantly improves photo quality\u003c\/li\u003e\n\u003cli\u003eIdeal for nebula photography\u003c\/li\u003e\n\u003cli\u003eIncreases the contrast between the sky background and the stellar object\u003c\/li\u003e\n\u003cli\u003eRefines stars and details\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cspan\u003eThe Vespera Dual Band Filter is a dual narrowband interference filter that will significantly improve your photo quality whether you are viewing from an urban or natural environment.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003eBy selecting very precisely the wavelengths of Hydrogen Alpha (H-alpha) and Oxygen III (O-III), found mainly in nebulae, the filter will increase the contrast between the Stellar object and the sky background. Thus, its use makes it possible to obtain a higher-quality image, with sharper stars and finer details.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003ciframe class=\"juxtapose\" src=\"https:\/\/cdn.knightlab.com\/libs\/juxtapose\/latest\/embed\/index.html?uid=65473a78-7a1e-11ed-b5bd-6595d9b17862\" width=\"70%\" height=\"480\"\u003e\u003c\/iframe\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eKeep only the essential\u003c\/b\u003e\u003c\/p\u003e\n\u003cp\u003eThe Dual Band filter has been designed to allow only two particular wavelengths to pass through to the Vespera sensor:\u003cbr\u003e– O-III\u003cbr\u003e– H-alpha\u003c\/p\u003e\n\u003cp\u003eDue to the filtered wavelengths, it is particularly effective for photographing nebulae in emission (e.g.: Orion nebula M42, Heart nebula IC 1805 …), dark nebulae endowed with hydrogen (e.g.: Horsehead or Elephant’s Trunk nebula…), planetary nebulae (e.g.: Owl nebula M97, Dumbbell nebula M27…), supernova remnants (e.g.: Veil nebula, Crab Nebula M1…).\u003c\/p\u003e\n\u003cp\u003eFor globular clusters (e.g.: Hercules cluster M13, cluster M92…), the selectivity of the Dual Band filter will help you to obtain sharper stars.\u003c\/p\u003e\n\u003cp\u003e\u003ciframe class=\"juxtapose\" src=\"https:\/\/cdn.knightlab.com\/libs\/juxtapose\/latest\/embed\/index.html?uid=3ccbf9e2-7a25-11ed-b5bd-6595d9b17862\" width=\"70%\" height=\"480\"\u003e\u003c\/iframe\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eA filter specifically studied for Vespera\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eThe optical quality of the Dual Band filter has been specifically studied by our engineers to offer use at full aperture, without any impact on the optical diameter of the instrument. The lens ring is equipped with an electronic micro-card that allows Vespera to detect the Dual Band filter and adapt its observation and image processing parameters.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eTransmission curve\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eThe filter features 12nm of bandwidth in each wavelength (O-III = 500.7nm, H-alpha = 656.3nm).\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003ca href=\"https:\/\/vaonis.com\/wp-content\/uploads\/2022\/12\/Vaonis-Graphique-Dual-Band.jpg\" data-rel=\"lightbox-image-0\" data-rl_title=\"\" data-rl_caption=\"\" title=\"\" class=\"swipebox\"\u003e\u003cimg class=\"alignnone wp-image-22062 size-full\" src=\"https:\/\/vaonis.com\/wp-content\/uploads\/2022\/12\/Vaonis-Graphique-Dual-Band.jpg\" alt=\"\" width=\"777\" height=\"300\"\u003e\u003c\/a\u003e\u003c\/p\u003e","brand":"Vaonis","offers":[{"title":"Default Title","offer_id":48557849379075,"sku":"U2606-DR-AC022","price":200.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/34ecaea6-e2c1-42f7-9e30-7c524c4d89f8.jpg?v=1782508801"},{"product_id":"used-vaonis-vespera-light-pollution-cls-filter","title":"Used Vaonis Vespera Light Pollution (CLS) Filter","description":"\u003cp\u003eThis is a Vespera light pollution filter in very good condition, with only a small amount of dust specks.  \u003cmeta charset=\"utf-8\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eAny dust you see in the photos is removable - it seems that these filters develop an electrostatic charge such that the dust in the air is just attracted to the filter.  \u003c\/span\u003eWe have taken this minor issue condition into account in the pricing.  You save big!  \u003c\/p\u003e\n\u003cp\u003eIt comes in a jewel case (not its original one) but does not include a box.  \u003c\/p\u003e\n\u003cp\u003e   \u003c\/p\u003e\n\u003cp\u003e   \u003c\/p\u003e\n\u003cp\u003e   \u003c\/p\u003e\n\u003cp\u003eThe Vespera light pollution filter or CLS (City Light Suppression) filter allows you to improve the quality of your photos when observing in the city or suburbs. It attenuates the effects of light pollution and thus increases the contrast between the celestial object being photographed and the background sky.\u003c\/p\u003e\n\u003cp\u003eThe broadband filter blocks wavelengths mainly emitted by urban night lighting or undesirable natural light, while allowing the main wavelengths from celestial objects.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eEssential for observing from an environment where light pollution is very present (urban and peri-urban environment, residential lighting, etc.)\u003c\/li\u003e\n\u003cli\u003eImproves the quality of nebula photography\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eThe Vespera light pollution filter or CLS (City Light Suppression) filter allows you to improve the quality of your photos when observing in the city or suburbs. It attenuates the effects of light pollution and thus increases the contrast between the celestial object being photographed and the background sky.\u003c\/p\u003e\n\u003cp\u003e \u003cmeta charset=\"utf-8\"\u003e\u003c\/p\u003e\n\u003ch2\u003eDescription\u003c\/h2\u003e\n\u003cp\u003eThe Vespera light pollution filter or CLS (City Light Suppression) filter allows you to improve the quality of your photos when observing in the city or suburbs. It attenuates the effects of light pollution and thus increases the contrast between the celestial object being photographed and the background sky.\u003c\/p\u003e\n\u003cp\u003eThe broadband filter blocks Na (sodium) and Hg (mercury) wavelengths mainly emitted by urban night lighting or undesirable natural light (atmospheric oxygen radiation, etc.), while allowing the main wavelengths from celestial objects.\u003c\/p\u003e\n\u003cp\u003eThe anti-light pollution filter is particularly useful for improving the brightness of deep sky objects: nebulae, star clusters, galaxies, etc. It is especially effective on emission nebulae because of the filtered wavelengths.\u003c\/p\u003e\n\u003cp\u003e\u003cu\u003eExamples of emission nebulae\u003c\/u\u003e: Bubble (NGC 7635), Crescent (NGC 6888), Eagle (M16), Elephant’s Trunk (IC 1396), Flame (NGC 2024), Lagoon (M8), North America (NGC 7000), Omega (M17), Orion (M42), Pacman (NGC 281), Rosette (NGC 2237), Tarantula (NGC 2070), Thor’s Helmet (NGC 2359), Trifid (M20), Tulip (Sh2-101).\u003c\/p\u003e\n\u003cp\u003eDesigned specifically for the Vespera lens, it fits easily and discreetly into the optical arm. The lens ring that holds the CLS filter is equipped with an electronic card that allows Vespera to detect it.\u003c\/p\u003e\n\u003cp\u003eThe filter is delivered in a transparent storage box.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eTransmission curve\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003ca href=\"https:\/\/vaonis.com\/wp-content\/uploads\/2022\/07\/Courbe-filtre-cls.png\" data-rel=\"lightbox-image-0\" data-rl_title=\"\" data-rl_caption=\"\" title=\"\" class=\"swipebox\"\u003e\u003cimg class=\"alignnone wp-image-24263 size-full\" src=\"https:\/\/vaonis.com\/wp-content\/uploads\/2022\/07\/Courbe-filtre-cls.png\" alt=\"Vespera light pollution filter transmission curve\" width=\"777\" height=\"300\"\u003e\u003c\/a\u003e\u003c\/p\u003e","brand":"Vaonis","offers":[{"title":"Default Title","offer_id":48558973124867,"sku":"U2606-DR-AC023","price":149.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/9e414900-c672-4e1a-a8e2-895a25057015.jpg?v=1782509320"},{"product_id":"used-celestron-filter-set-2","title":"Used Celestron Filter Set, 2\"","description":"\u003ch4\u003eCondition:\u003c\/h4\u003e\n\u003cp\u003eThis is a Celestron planetary filter set in the 2\" size. These are in excellent condition with clean optics. This includes the original jewel cases for each filter, but no box. \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch4\u003eDescription:\u003c\/h4\u003e\n\u003ccenter\u003e\n\u003cp style=\"text-align: left;\"\u003e\u003cstrong\u003eCelestron Color Four Filter Set for 2-Inch Eyepieces: \u003c\/strong\u003ePlanetary and lunar observation is almost always improved by the use of color filters. (ORGB) They bring out subtle details by selectively increasing the contrast among markings of different hues, and by reducing irradiation, the smudging of the boundaries between light and dark regions due primarily to turbulence in the Earth's atmosphere. \u003c\/p\u003e\n\u003c\/center\u003e\n\u003cp\u003e\u003cbr\u003e\u003cspan\u003eWith the right color filter, suddenly the indistinct, pale bands of Jupiter resolve into loops and festoons. Delicate markings appear on Saturn's globe, and the Cassini and crepe divisions darken and solidify. Mars' polar caps stand out like tiny pearls, and vague lunar rilles acquire greater depth and contrast. Bad seeing becomes acceptable; good seeing becomes superb!\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003c\/span\u003eBecause many planets have a characteristic color (e.g., Mars is reddish), a color filter will reduce the predominant hues to enhance contrast and uncover hidden surface markings. That's why the Red Planet is most effectively enhanced with a green filter!\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch3\u003e\u003cstrong\u003eAbout Each Filter:\u003c\/strong\u003e\u003c\/h3\u003e\n\u003ch4\u003e\n\u003cmeta charset=\"utf-8\"\u003e\n\u003cb\u003e#21 Orange Planetary Filter:\u003c\/b\u003e\u003cb\u003e\u003c\/b\u003e\n\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cmeta charset=\"utf-8\"\u003e\n\u003cspan\u003esharpens boundaries between yellow-orange areas and blue-green regions on Mars\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003e\u003cmeta charset=\"utf-8\"\u003esharpens contrast and enhance detail in the bands\/belts and polar regions on Jupiter and Saturn and brings out the Great Red Spot\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003eincreases contrast of lunar features\u003c\/li\u003e\n\u003cli\u003elow-contrast cloud detail on Venus\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cb\u003e#25 Red Planetary Filter :\u003c\/b\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eMartian surface details in large scopes\u003c\/li\u003e\n\u003cli\u003ebluish cloud regions on Jupiter and Saturn\u003c\/li\u003e\n\u003cli\u003econtrast of Mercury against blue sky\u003c\/li\u003e\n\u003cli\u003ecloud definition on Venus\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cb\u003e#58 Green Planetary Filter:\u003c\/b\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003econtrast of blue and red structures on Jupiter (including Red Spot)\u003c\/li\u003e\n\u003cli\u003emelt lines around Martian polar ice caps\u003c\/li\u003e\n\u003cli\u003eSaturn's cloud belts\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cb\u003e#80A Medium Blue Planetary Filter:\u003c\/b\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003edetails in Jupiter's cloud belts and Red Spot\u003c\/li\u003e\n\u003cli\u003ehigh clouds and polar caps on Mars\u003c\/li\u003e\n\u003cli\u003elunar surface details\u003c\/li\u003e\n\u003cli\u003eVenus cloud features\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Celestron","offers":[{"title":"Default Title","offer_id":48559667380483,"sku":"U2606-XXX-05513","price":35.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/c2f1c3a9-6b10-4a21-b2f7-ccea86ef6815.jpg?v=1782513333"},{"product_id":"used-idas-lps-p2-48mm-filter-mbt-igad","title":"Used IDAS LPS-P2 48mm filter (MBT \u0026 IGAD)","description":"\u003cp\u003e\u003cstrong\u003eCondition\u003c\/strong\u003e: This is a used IDAS light pollution suppression filter in very good condition. The optics are reasonably clean, with some minor spotting, and it comes in a jewel case. See the photos.  \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eDescription\u003c\/strong\u003e:\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eLight pollution suppression (LPS) filters are designed to suppress the common emission lines generated by artificial lighting, yet allow the important nebula emission lines to pass, thus enhancing the contrast of astronomical objects, particularly emission nebulae.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eUnlike other light pollution suppression filters, IDAS filters are specifically designed for balanced color transmission using the IDAS unique \u003cb\u003eMulti-Bandpass Technology\u003c\/b\u003e (MBT) process. The balanced transmission allows color photographs to be taken with minimal color cast to broadband emission objects such as stars, galaxies and globular clusters. The comparison photos at right demonstrate (qualitatively) that the IDAS filter maintains better color balance than other filters which have been designed for visual use.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eLPS filters utilize the unique IDAS Ion Gun Assisted Deposition (IGAD*) coating technology for superior coating durability (quartz hardness) and safer cleaning. IGAD coatings also improve temperature and humidity stability of the filter performance, reducing spectrum shifts down to +\/-1nm from the +\/-3 or 4nm shift of standard coatings.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eCCD imaging can also benefit, because although CCD imagers can already shoot through light pollution to some extent, including an LPS filter to the setup gives an added (signal-to-noise) edge.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eNote, however, that light pollution suppression filters are \u003c\/span\u003e\u003cspan\u003enot\u003c\/span\u003e\u003cspan\u003e a perfect substitute for dark skies.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eLPS filters are available for 1-1\/4\" and 2\" (48mm) eyepieces, as well as in numerous sizes to accomodate most popular camera lenses. Each filter lot is tested and a plot of the spectral response of the lot is provided with each filter. \u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0869\/6486\/files\/tokai1_large.gif?10873360616383643319\" alt=\"\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e[Above] Spectral response (% transmission vs. wavelength in nanometers) of the IDAS Light Pollution Suppression filter. Major emission lines generated by artificial lighting are also indicated. Note that this plot represents the spec target for LPS filters. The spectral response of each individual filter will vary. This is measured, plotted, and shipped with each filter produced:\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0869\/6486\/files\/idas-p2_1024x1024.gif?7115251255644343845\" alt=\"\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eAbove is a sample of the filter lot data plot which is shipped with each filter.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eThe IDAS production criteria for filters are as follows, arranged from left to right (short to long wavelength) as plotted above:\u003c\/span\u003e\u003c\/p\u003e\n\u003cdiv class=\"scrollable-wrapper\"\u003e\n\u003ctable\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003e\u003cspan size=\"2\" face=\"Arial, Geneva\"\u003eWavelength (nm)\u003c\/span\u003e\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003e\u003cspan size=\"2\" face=\"Arial, Geneva\"\u003e\u003cspan\u003ePass\/Block\u003c\/span\u003e\u003c\/span\u003e\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003e\u003cspan size=\"2\" face=\"Arial, Geneva\"\u003e\u003cspan\u003eTransmission\u003c\/span\u003e\u003c\/span\u003e\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan size=\"2\" face=\"Arial, Geneva\"\u003e365\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan size=\"2\" face=\"Arial, Geneva\"\u003eBlock\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan size=\"2\" face=\"Arial, Geneva\"\u003e6.5% max\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan size=\"2\" face=\"Arial, Geneva\"\u003e405\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan size=\"2\" face=\"Arial, Geneva\"\u003eBlock\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan size=\"2\" face=\"Arial, Geneva\"\u003e6.5% max\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan size=\"2\" face=\"Arial, Geneva\"\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan size=\"2\" face=\"Arial, Geneva\"\u003ePass\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan size=\"2\" face=\"Arial, Geneva\"\u003e60% min (avg)\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan size=\"2\" face=\"Arial, Geneva\"\u003e436\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan size=\"2\" face=\"Arial, Geneva\"\u003eBlock\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan size=\"2\" face=\"Arial, Geneva\"\u003e6.5% max\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan size=\"2\" face=\"Arial, Geneva\"\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan size=\"2\" face=\"Arial, Geneva\"\u003ePass\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan size=\"2\" face=\"Arial, Geneva\"\u003e92% min (avg)\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan size=\"2\" face=\"Arial, Geneva\"\u003e546\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan size=\"2\" face=\"Arial, Geneva\"\u003eBlock\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan size=\"2\" face=\"Arial, Geneva\"\u003e6.5% max\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan size=\"2\" face=\"Arial, Geneva\"\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan size=\"2\" face=\"Arial, Geneva\"\u003ePass\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan size=\"2\" face=\"Arial, Geneva\"\u003e75% min (avg)\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan size=\"2\" face=\"Arial, Geneva\"\u003e590\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan size=\"2\" face=\"Arial, Geneva\"\u003eBlock\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan size=\"2\" face=\"Arial, Geneva\"\u003e6.5% max\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan size=\"2\" face=\"Arial, Geneva\"\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan size=\"2\" face=\"Arial, Geneva\"\u003ePass\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan size=\"2\" face=\"Arial, Geneva\"\u003e75% min (avg)\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan size=\"2\" face=\"Arial, Geneva\"\u003e623\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan size=\"2\" face=\"Arial, Geneva\"\u003eBlock\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan size=\"2\" face=\"Arial, Geneva\"\u003e25% max\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan size=\"2\" face=\"Arial, Geneva\"\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan size=\"2\" face=\"Arial, Geneva\"\u003ePass\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan size=\"2\" face=\"Arial, Geneva\"\u003e80% min (avg)\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cp\u003e\u003cspan\u003e \u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0869\/6486\/files\/tokai2_large.gif?10873360616383643319\" alt=\"\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e[Above] Off-axis spectral response (% transmission vs. wavelength in nanometers) of the IDAS filter.\u003c\/span\u003e\u003c\/p\u003e","brand":"Astro-Hutech","offers":[{"title":"Default Title","offer_id":48570310197507,"sku":"U2606-XXX-LPS-P2","price":75.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/cbd63d97-feb6-41f0-8261-42d3b66a03f1.jpg?v=1782515611"},{"product_id":"used-baader-o-iii-nebula-filter-10nm-2","title":"Used Baader O-III Nebula Visual Filter (10nm), 2\"","description":"\u003ch4\u003eCondition:\u003c\/h4\u003e\n\u003cp\u003eThis is a used Baader O-III 10nm visual filter in very good condition with mostly clean optics.  There is some minor spotting; see the photos.  It comes in its original jewel case. \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch4\u003eDescription:\u003c\/h4\u003e\n\u003cdiv class=\"product info short_description\"\u003e\n\u003ch4\u003eQuick Overview\u003c\/h4\u003e\n\u003cdiv class=\"value\"\u003e\n\u003cdiv class=\"product attribute short_description\"\u003e\n\u003cdiv class=\"value\"\u003e\n\u003cul\u003e\n\u003cli\u003eBaader 2” OIII filter improves contrast of nebulae for visual observation and imaging\u003c\/li\u003e\n\u003cli\u003e10nm passband includes OIII (501nm) and H-Beta (486nm) wavelengths emitted by diffuse and planetary nebulae and supernova remnants\u003c\/li\u003e\n\u003cli\u003eSuperior fine optical substrates for excellent performance, even at high magnifications\u003c\/li\u003e\n\u003cli\u003eHard ion-beam-deposited and scratch-resistant coating for easy, safe cleaning and long life\u003c\/li\u003e\n\u003cli\u003eMounted in spring-loaded optical cell to ensure superior optical performance\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"product info description\"\u003e\n\u003ch4\u003eProduct Details\u003c\/h4\u003e\n\u003cdiv class=\"value\"\u003e\n\u003cdiv class=\"product attribute description\"\u003e\n\u003cdiv class=\"value\"\u003e\n\u003cp\u003e\u003cstrong\u003ePremium OIII Filter for Visual Observation of Nebulae\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eBaader’s 2” OIII filter delivers the absolute highest contrast views of diffuse and planetary nebulae. The filter is ideal for visual observation of nebulae such as The Veil, Lagoon (M8), Swan (M17), Ring (M57) and Dumbbell (M27). In many cases, the Baader O-III filters reveals a level of intricate detail that rivals the best deep sky photographs. With a larger scope, you can even view the famous 'Pillars of Creation' in the Eagle Nebula (M16).\u003c\/p\u003e\n\u003cp\u003eThe Baader O-III perfectly isolates the two doubly ionized oxygen lines (at 496nm and 501nm) emitted by nebulae using a very sharp and narrow bandpass (about 10 nm wide). Unlike other O-III filters, the Baader O-III completely blocks longer and shorter wavelengths (which is why this filter appears a teal color rather than pink) along with common light pollution bands. The result is the highest visual contrast achievable in an O-III filter. When combined with a Baader UV\/IR filter, this O-III also works well for deep-sky imaging.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eSuperior Optical Quality, Even at High Magnification\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eAt the heart of the Baader OIII filters are their special fine optical substrate polishing process and advanced hard coating design. The result is a filter that imparts virtually no image degradation. Manufacturers of lesser filters, to prevent deterioration from cleaning or exposure to moisture, sometimes resort to sandwiching their delicate coatings between two layers of filter glass, resulting in potential blurred or double images. Unlike these lesser filters, the superior optical quality of the Baader OIII filter allows for use at higher magnifications which are particularly useful for studying fine detail, particularly in brighter diffuse and planetary nebulae. Baader OIII filters can take high magnifications, and stars retain their pinpoint sharpness, even if the filter is used far ahead of the image plane when used for astrophotography or when used ahead of a star diagonal or binoviewer.  Baader filters fulfill the requirements of an ideal optical filter - to perform at highest efficiency without any other detectable effect on the image.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eAdvanced Optical Manufacturing for Long Life and Superior Performance\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eUnlike many budget filters, Baader Planetarium filters are not “biscuit cut” out of larger plates of glass, a process that causes micro-cracks around the filter edges. These cracks can attract moisture between the glass substrate and coating layers via capillary action which causes premature aging and degradation.\u003c\/p\u003e\n\u003cp\u003eBy contrast, each Baader filter is individually cut to size (1¼\", 31mm, 36mm, 2\", 50,4mm, 50x50mm, 65x65mm), then polished flat on both sides to a quarter wavelength to ensure maximum image sharpness and distortion over the entire filter, even when the filter is not close to the focal plane. Then each blank is then individually coated with a hard, ion-beam-deposited scratch-resistant coating. However, the coating is not applied all the way to the edge of the substrate to ensure the filter is sealed against the penetration of moisture, even in very humid conditions. This is especially important in multilayer, narrowband filters where moisture can seep in if the coating is not properly deposited. The hard coatings also mean Baader filters are easier and safer to clean without damage.\u003c\/p\u003e\n\u003cp\u003eBaader filters are also tested repeatedly to comply with MIL-specifications. One common process is to boil the test specimen for one hour in salt water to induced damage. Unlike budget filters cut from larger plates, Baader filters remained completely intact without changes in their transmission characteristics after this rigorous environmental testing.\u003c\/p\u003e\n\u003cp\u003eBaader’s careful engineering and manufacturing mean you need to buy a Baader filter just once and it will last you for a lifetime of astronomical observations.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eAbout Baader Filter Cells\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eMany filter vendors insert their filter blanks into standard tightly-screwed filter cells. Unfortunately, the stress on the filter can result in drastic deformations of the substrate and degradation in optical performance.\u003c\/p\u003e\n\u003cp\u003eThat’s why all Baader filters are no longer tightly fixed but are held spring-loaded in the filter cell. The filter glass may ever so slightly “clatter” in the cell when shaken, but that neither affects the image quality nor results in a displacement in the final image. This “clatter” is not a flaw in the filter cell. It is entirely intentional.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"Baader","offers":[{"title":"Default Title","offer_id":48571459535107,"sku":"U2606-XXX-2458396","price":100.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/030791b4-b55e-4bbc-a818-a43090f5bbed.jpg?v=1782516463"},{"product_id":"used-astronomik-uhc-filter-1-25-round-mounted","title":"Used Astronomik UHC Filter - 1.25\" Round Mounted","description":"\u003cp\u003eThis is an Astronomik UHC filter in good condition.  The optical surfaces are generally, clean, but they do have dust on both sides that we have not been able to clean.  See the photos. We have taken this issue condition into consideration in the pricing - HALF OFF.  \u003c\/p\u003e\n\u003cp\u003e\u003cspan style=\"font-family: -apple-system, BlinkMacSystemFont, 'San Francisco', 'Segoe UI', Roboto, 'Helvetica Neue', sans-serif; font-size: 0.875rem;\"\u003e\u003cspan\u003eThis includes its original jewel case but no box.  \u003c\/span\u003e \u003c\/span\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan style=\"font-family: -apple-system, BlinkMacSystemFont, 'San Francisco', 'Segoe UI', Roboto, 'Helvetica Neue', sans-serif; font-size: 0.875rem;\"\u003e\u003cspan\u003e \u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan style=\"font-family: -apple-system, BlinkMacSystemFont, 'San Francisco', 'Segoe UI', Roboto, 'Helvetica Neue', sans-serif; font-size: 0.875rem;\"\u003e\u003cspan\u003e \u003cmeta charset=\"utf-8\"\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003ch2 data-eapps-font-size=\"24\" data-eapps-line-height=\"36\"\u003eAstronomik UHC Filter - 1.25\" Round Mounted\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eThis Astronomik UHC Filter, a great visual filter designed for broadband deep sky observing, is mounted in a 1.25\" machined cell\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul\u003e\n\u003cli\u003eMade to the highest technical standards to supply the high optical performance you want and need for observing deep sky objects\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul\u003e\n\u003cli\u003eWith a high transmission of nearly 100% of H-Beta and OIII lines, you will see lots of extra detail in gas and planetary nebulae\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul\u003e\n\u003cli\u003eAll Astronomik filters feature multi-layer coatings to protect them from blemishes caused by scratching, aging, and humidity\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul\u003e\n\u003cli\u003evMade in Germany, a country known for producing optics of supreme quality!\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 data-eapps-font-size=\"18\" data-eapps-line-height=\"27\"\u003eMore About the Astronomik 1.25\" Round Mounted UHC Filter\u003c\/h3\u003e\n\u003cp data-eapps-font-size=\"16\" data-eapps-line-height=\"24\"\u003eThis Astronomik UHC Filter is made for visual deep sky observation. It allows almost 100% of radiation from both OIII and H-beta lines to pass through. Additionally, a second bandpass for the H-alpha line makes sure that this radiation also reaches the eye. Meanwhile, scattered light from other wavelength ranges is filtered out. Due to the strong reduction of the sky background, gas and planetary nebulae are visible with an unexpected abundance of detail. The Astronomik UHC Filter provides enough light to successfully observe deep sky objects with smaller telescopes because of its high transmission.\u003c\/p\u003e\n\u003cp data-eapps-font-size=\"16\" data-eapps-line-height=\"24\"\u003eOptimized for use with telescopes that have focal ratios of f\/4 to f\/15. Unlike other filters on the market, loss of transmission and color displacement only occurs with this filter when extremely fast focal ratios of f\/3 or less are involved. The UHC filters work with 2\" aperture instruments and above but work particularly well with 5\" apertures and larger. Compared to UHC filters sold by other manufacturers, the Astronomik UHC filter shows you more stars along with more nebula detail, and because of the high quality of the glass, you will be able to see stars as small pinpoints.\u003c\/p\u003e\n\u003cp data-eapps-font-size=\"16\" data-eapps-line-height=\"24\"\u003eThe coatings are completely sealed and immune to moisture. They do not change with time, keeping their transmission characteristics indefinitely. Astronomik UHC filter coatings are so tough that it is impossible to scratch them by mistake. To get even the finest of scratches, you would have to rub them with sandpaper! Astronomik filters include a high quality, long-lasting, plastic storage case.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eAll  Astronomik Filters are perfect for modern cameras, including both CMOS and CCD based cameras, allowing you to capture the very best images possible with your instruments. Sharpness, contrast and the absence of any reflections is guaranteed.\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cbr\u003e\u003cstrong\u003e\u003cspan\u003e\u003c\/span\u003e\u003cspan\u003eEach and every Astronomik filter has to pass a complex quality control process before being suitable for delivery to our customers. Each and every emission line filter is measured with a high-end Perkin-Elmer spectral-photometer to make sure that every single filter is up to the specifications published on our website.\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e","brand":"Astronomik","offers":[{"title":"Default Title","offer_id":48572035694851,"sku":"U2606-XXX-ASF-UHC-1","price":50.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/83c0d8fd-e3f2-4af3-9f08-406102f4ee72.jpg?v=1782516939"},{"product_id":"used-astronomik-uhc-filter-2-round-mounted-copy","title":"Used Astronomik UHC Filter - 2\" Round Mounted","description":"\u003cp\u003eThis is an Astronomik UHC filter in good condition.  The optical surfaces are generally clean, but they do have dust on both sides that we have not been able to clean.  See the photos. We have taken this issue condition into consideration in the pricing - \u003cstrong\u003eHALF OFF.  \u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan style=\"font-family: -apple-system, BlinkMacSystemFont, 'San Francisco', 'Segoe UI', Roboto, 'Helvetica Neue', sans-serif; font-size: 0.875rem;\"\u003e\u003cspan\u003eThis includes its original jewel case but no box.  \u003c\/span\u003e \u003c\/span\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan style=\"font-family: -apple-system, BlinkMacSystemFont, 'San Francisco', 'Segoe UI', Roboto, 'Helvetica Neue', sans-serif; font-size: 0.875rem;\"\u003e\u003cspan\u003e \u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan style=\"font-family: -apple-system, BlinkMacSystemFont, 'San Francisco', 'Segoe UI', Roboto, 'Helvetica Neue', sans-serif; font-size: 0.875rem;\"\u003e\u003cspan\u003e \u003cmeta charset=\"utf-8\"\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003ch2 data-eapps-font-size=\"24\" data-eapps-line-height=\"36\"\u003eAstronomik UHC Filter - 2\" Round Mounted\u003c\/h2\u003e\n\u003cp data-eapps-font-size=\"16\" data-eapps-line-height=\"24\"\u003eIf you want to get the most out of your deep sky observation, the Astronomik UHC Filter (Ultra High Contrast) is what you’ve been needing. This filter will unlock the faint, nebulous detail, allowing you to see high-contrast views of your favorite deep-space nebulae! Isolating specific wavelengths with narrowband filters makes these targets stand out from the black sky and light pollution. Filters aren’t just for imaging, they can also give you a spectacular view when paired with your eyepieces!\u003c\/p\u003e\n\u003cp data-eapps-font-size=\"16\" data-eapps-line-height=\"24\"\u003eThe Astronomik UHC 2\" Filter is designed for a versatile deep sky observation experience. UHC filters are ideal for enhancing deep sky objects by boosting contrast and reducing light pollution, making them a great all-purpose option, especially in suburban skies. Using the UHC filter allows 95% transmission at 486nm (H-beta), 496nm (OIII), 501nm (OIII), and 656nm (H-alpha). This filter is made to Astronomik's exacting standards. While transmission ratings may vary between each filter, you can expect a transmission rating of around 95% for this UHC filter. The specific T-Max will be listed on the filter case. You can rest easy knowing that every unit is thoroughly tested and guaranteed to meet Astronomik's stellar performance benchmark!\u003c\/p\u003e\n\u003cdiv class=\"hero-img-container one-hero\" data-eapps-font-size=\"16\" data-eapps-line-height=\"24\"\u003e\n\u003cdiv class=\"hero-img\" data-eapps-font-size=\"16\" data-eapps-line-height=\"24\"\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\u003ch3 data-eapps-font-size=\"18\" data-eapps-line-height=\"27\"\u003eUnlock Stellar Detail!\u003c\/h3\u003e\n\u003cp data-eapps-font-size=\"16\" data-eapps-line-height=\"24\"\u003eThe Astronomik UHC Filter has been rigorously tested to deliver an optical performance that will elevate your experience. This filter brings out stunning detail in popular targets like the Eagle Nebula, Rosette Nebula, Pleiades cluster, and many more. Learn more about the optics and compatibility below!\u003c\/p\u003e\n\u003cdiv class=\"prod-img-container-outer\" data-eapps-font-size=\"16\" data-eapps-line-height=\"24\"\u003e\n\u003cdiv class=\"prod-img-container\" data-eapps-font-size=\"16\" data-eapps-line-height=\"24\"\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003cspan\u003e \u003c\/span\u003e\n\u003cp data-eapps-font-size=\"16\" data-eapps-line-height=\"24\"\u003e\u003cstrong data-eapps-font-size=\"16\" data-eapps-line-height=\"24\"\u003eCompatibility!\u003c\/strong\u003e\u003cbr\u003eThis filter works best with telescopes at focal ratios between f\/4 and f\/15. Loss of transmission and color displacement, which can be a problem with other filters on the market, only crop up with Astronomik filters when ultra-fast focal ratios of f\/3 or less are in play. Astronomik UHC filters work with 2\" aperture instruments and above, but work particularly well with 5\" apertures and larger. When measured against other available filters, the Astronomik UHC filter displays more stars along with more nebula characteristics, and due to the high quality of the glass, you will get pinpoint stars! This filter is housed in a 2\" round mounted filter cell. You can easily thread it to the eyepiece barrel or any threaded 2\" accessory!\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"prod-img-container-outer\" data-eapps-font-size=\"16\" data-eapps-line-height=\"24\"\u003e\n\u003cdiv class=\"prod-img-container\" data-eapps-font-size=\"16\" data-eapps-line-height=\"24\"\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003cspan\u003e \u003c\/span\u003e\n\u003cp data-eapps-font-size=\"16\" data-eapps-line-height=\"24\"\u003e\u003cstrong data-eapps-font-size=\"16\" data-eapps-line-height=\"24\"\u003eAbout the Coatings!\u003c\/strong\u003e\u003cbr\u003eAstronomik UHC Filter coatings are fully sealed and therefore not affected by moisture. These filters continually maintain their transmission characteristics. Scratching these incredibly tough coatings by accident would be impossible! All Astronomik filters are delivered with a durable plastic storage container of supreme quality.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eAll  Astronomik Filters are perfect for modern cameras, including both CMOS and CCD based cameras, allowing you to capture the very best images possible with your instruments. Sharpness, contrast and the absence of any reflections is guaranteed.\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cbr\u003e\u003cstrong\u003e\u003cspan\u003e\u003c\/span\u003e\u003cspan\u003eEach and every Astronomik filter has to pass a complex quality control process before being suitable for delivery to our customers. Each and every emission line filter is measured with a high-end Perkin-Elmer spectral-photometer to make sure that every single filter is up to the specifications published on our website.\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e","brand":"Astronomik","offers":[{"title":"Default Title","offer_id":48572373401859,"sku":"U2606-XXX-ASF-UHC-2","price":100.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/cd502190-91c5-47a4-8a20-12468fbb8bac.jpg?v=1782517291"},{"product_id":"used-vaonis-vespera-light-pollution-cls-filter-1","title":"Used Vaonis Vespera Light Pollution (CLS) Filter","description":"\u003cp\u003eThis is a returned Vespera light pollution filter in excellent, clean condition.  The only reason we're not listing this as an Open Box is because the previous owner etched \"Light Pollution\" into the plastic jewel box.  Otherwise, the filter itself is practically untouched.  Save \u003cstrong\u003eFIFTY BUCKS\u003c\/strong\u003e off of a brand new one!  \u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eAny dust you may see in the photos is removable - it seems that these filters develop an electrostatic charge such that the dust in the air is just attracted to the filter.  \u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003eIt comes in the etched jewel case and its original box.  \u003c\/p\u003e\n\u003cp\u003e   \u003c\/p\u003e\n\u003cp\u003e   \u003c\/p\u003e\n\u003cp\u003e   \u003c\/p\u003e\n\u003cp\u003eThe Vespera light pollution filter or CLS (City Light Suppression) filter allows you to improve the quality of your photos when observing in the city or suburbs. It attenuates the effects of light pollution and thus increases the contrast between the celestial object being photographed and the background sky.\u003c\/p\u003e\n\u003cp\u003eThe broadband filter blocks wavelengths mainly emitted by urban night lighting or undesirable natural light, while allowing the main wavelengths from celestial objects.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eEssential for observing from an environment where light pollution is very present (urban and peri-urban environment, residential lighting, etc.)\u003c\/li\u003e\n\u003cli\u003eImproves the quality of nebula photography\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eThe Vespera light pollution filter or CLS (City Light Suppression) filter allows you to improve the quality of your photos when observing in the city or suburbs. It attenuates the effects of light pollution and thus increases the contrast between the celestial object being photographed and the background sky.\u003c\/p\u003e\n\u003cp\u003e \u003cmeta charset=\"utf-8\"\u003e\u003c\/p\u003e\n\u003ch2\u003eDescription\u003c\/h2\u003e\n\u003cp\u003eThe Vespera light pollution filter or CLS (City Light Suppression) filter allows you to improve the quality of your photos when observing in the city or suburbs. It attenuates the effects of light pollution and thus increases the contrast between the celestial object being photographed and the background sky.\u003c\/p\u003e\n\u003cp\u003eThe broadband filter blocks Na (sodium) and Hg (mercury) wavelengths mainly emitted by urban night lighting or undesirable natural light (atmospheric oxygen radiation, etc.), while allowing the main wavelengths from celestial objects.\u003c\/p\u003e\n\u003cp\u003eThe anti-light pollution filter is particularly useful for improving the brightness of deep sky objects: nebulae, star clusters, galaxies, etc. It is especially effective on emission nebulae because of the filtered wavelengths.\u003c\/p\u003e\n\u003cp\u003e\u003cu\u003eExamples of emission nebulae\u003c\/u\u003e: Bubble (NGC 7635), Crescent (NGC 6888), Eagle (M16), Elephant’s Trunk (IC 1396), Flame (NGC 2024), Lagoon (M8), North America (NGC 7000), Omega (M17), Orion (M42), Pacman (NGC 281), Rosette (NGC 2237), Tarantula (NGC 2070), Thor’s Helmet (NGC 2359), Trifid (M20), Tulip (Sh2-101).\u003c\/p\u003e\n\u003cp\u003eDesigned specifically for the Vespera lens, it fits easily and discreetly into the optical arm. The lens ring that holds the CLS filter is equipped with an electronic card that allows Vespera to detect it.\u003c\/p\u003e\n\u003cp\u003eThe filter is delivered in a transparent storage box.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eTransmission curve\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003ca class=\"swipebox\" title=\"\" data-rl_caption=\"\" data-rl_title=\"\" data-rel=\"lightbox-image-0\" href=\"https:\/\/vaonis.com\/wp-content\/uploads\/2022\/07\/Courbe-filtre-cls.png\"\u003e\u003cimg height=\"300\" width=\"777\" alt=\"Vespera light pollution filter transmission curve\" src=\"https:\/\/vaonis.com\/wp-content\/uploads\/2022\/07\/Courbe-filtre-cls.png\" class=\"alignnone wp-image-24263 size-full\"\u003e\u003c\/a\u003e\u003c\/p\u003e","brand":"Vaonis","offers":[{"title":"Default Title","offer_id":48696004542723,"sku":"U2606-XXX-AC023","price":180.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/443dd29a-54b4-4f0d-a6e2-b6c511837a7d.jpg?v=1782584815"},{"product_id":"used-vaonis-vespera-dual-band-filter-4","title":"Used Vaonis Vespera Dual-Band Filter","description":"\u003cp\u003eThis is a returned Vespera dual-band filter in excellent, clean condition.  The only reason we're not listing this as an Open Box is because the previous owner etched \"Dual Band\" into the plastic jewel box.  Otherwise, the filter itself is practically untouched.  Save \u003cstrong\u003eFIFTY BUCKS\u003c\/strong\u003e off of a brand new one!  \u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eAny dust you may see in the photos is removable - it seems that these filters develop an electrostatic charge such that the dust in the air is just attracted to the filter.  \u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003eIt comes in the etched jewel case and its original box.  \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cbr\u003e\u003cmeta charset=\"utf-8\"\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003eThe Vespera Dual Band Filter is a dual narrowband interference filter that will significantly improve your photo quality whether you are viewing from an urban or natural environment.\u003c\/p\u003e\n\u003cp\u003eBy selecting very precisely the wavelengths of Hydrogen Alpha (H-alpha) and Oxygen III (O-III), found mainly in nebulae, the filter will increase the contrast between the Stellar object and the sky background. Thus, its use makes it possible to obtain a higher-quality image, with sharper stars and finer details.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eSignificantly improves photo quality\u003c\/li\u003e\n\u003cli\u003eIdeal for nebula photography\u003c\/li\u003e\n\u003cli\u003eIncreases the contrast between the sky background and the stellar object\u003c\/li\u003e\n\u003cli\u003eRefines stars and details\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cspan\u003eThe Vespera Dual Band Filter is a dual narrowband interference filter that will significantly improve your photo quality whether you are viewing from an urban or natural environment.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003eBy selecting very precisely the wavelengths of Hydrogen Alpha (H-alpha) and Oxygen III (O-III), found mainly in nebulae, the filter will increase the contrast between the Stellar object and the sky background. Thus, its use makes it possible to obtain a higher-quality image, with sharper stars and finer details.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003ciframe height=\"480\" width=\"70%\" src=\"https:\/\/cdn.knightlab.com\/libs\/juxtapose\/latest\/embed\/index.html?uid=65473a78-7a1e-11ed-b5bd-6595d9b17862\" class=\"juxtapose\"\u003e\u003c\/iframe\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eKeep only the essential\u003c\/b\u003e\u003c\/p\u003e\n\u003cp\u003eThe Dual Band filter has been designed to allow only two particular wavelengths to pass through to the Vespera sensor:\u003cbr\u003e– O-III\u003cbr\u003e– H-alpha\u003c\/p\u003e\n\u003cp\u003eDue to the filtered wavelengths, it is particularly effective for photographing nebulae in emission (e.g.: Orion nebula M42, Heart nebula IC 1805 …), dark nebulae endowed with hydrogen (e.g.: Horsehead or Elephant’s Trunk nebula…), planetary nebulae (e.g.: Owl nebula M97, Dumbbell nebula M27…), supernova remnants (e.g.: Veil nebula, Crab Nebula M1…).\u003c\/p\u003e\n\u003cp\u003eFor globular clusters (e.g.: Hercules cluster M13, cluster M92…), the selectivity of the Dual Band filter will help you to obtain sharper stars.\u003c\/p\u003e\n\u003cp\u003e\u003ciframe height=\"480\" width=\"70%\" src=\"https:\/\/cdn.knightlab.com\/libs\/juxtapose\/latest\/embed\/index.html?uid=3ccbf9e2-7a25-11ed-b5bd-6595d9b17862\" class=\"juxtapose\"\u003e\u003c\/iframe\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eA filter specifically studied for Vespera\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eThe optical quality of the Dual Band filter has been specifically studied by our engineers to offer use at full aperture, without any impact on the optical diameter of the instrument. The lens ring is equipped with an electronic micro-card that allows Vespera to detect the Dual Band filter and adapt its observation and image processing parameters.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eTransmission curve\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eThe filter features 12nm of bandwidth in each wavelength (O-III = 500.7nm, H-alpha = 656.3nm).\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003ca class=\"swipebox\" title=\"\" data-rl_caption=\"\" data-rl_title=\"\" data-rel=\"lightbox-image-0\" href=\"https:\/\/vaonis.com\/wp-content\/uploads\/2022\/12\/Vaonis-Graphique-Dual-Band.jpg\"\u003e\u003cimg height=\"300\" width=\"777\" alt=\"\" src=\"https:\/\/vaonis.com\/wp-content\/uploads\/2022\/12\/Vaonis-Graphique-Dual-Band.jpg\" class=\"alignnone wp-image-22062 size-full\"\u003e\u003c\/a\u003e\u003c\/p\u003e","brand":"Vaonis","offers":[{"title":"Default Title","offer_id":48696392909059,"sku":"U2606-XXX-AC022","price":350.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/762620f9-e927-4c25-bf50-341e7e5012cc.jpg?v=1782585102"}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/collections\/Used_Filters.jpg?v=1782590604","url":"https:\/\/milehighastro.com\/collections\/used-filters.oembed","provider":"Mile High Astronomy","version":"1.0","type":"link"}