{"product_id":"starizona-sct-corrector-iv-0-63x-reducer-coma-corrector-sctcorr-4","title":"Starizona SCT Corrector IV - 0.63X Reducer \/ Coma Corrector (SCTCORR-4)","description":"\u003ch2\u003eStarizona SCT Corrector IV 0.63X Reducer \/ Coma Corrector\u003c\/h2\u003e\n\u003cp\u003e\u003cb\u003ePerformance\u003c\/b\u003e\u003c\/p\u003e\n\u003cdiv\u003e\u003cimg height=\"200\" width=\"319\" alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0327\/2569\/6648\/files\/C11_f6pt3_Spot_Comparison.jpg?v=1612490687\"\u003e\u003c\/div\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003eThe diagram above shows how the SCT Corrector improves the off-axis spot size on a Celestron 11\" SCT. Performance is similar on other size telescopes.\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eFocal Length\u003c\/b\u003e\u003c\/p\u003e\n\u003cp\u003eThe exact focal length of the reducer\/telescope combo depends slightly on where in the optical path the SCT Corrector lens is placed. Nominally it will be within a few mm of the rear threads on the telescope. Changing this distance should only affect the focal length, not the optical quality. Listed below are the nominal focal lengths for the various sizes of Celestron SCTs*. The SCT Corrector works great on standard f\/10 Meade SCTs as well, we just didn't have exact data for the nominal designs of those telescopes.\u003c\/p\u003e\n\u003ctable\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd width=\"100\"\u003e\u003cb\u003eTelescope\u003c\/b\u003e\u003c\/td\u003e\n\u003ctd width=\"100\"\u003e\u003cb\u003eFocal Length\u003c\/b\u003e\u003c\/td\u003e\n\u003ctd width=\"100\"\u003e\u003cb\u003eFocal Ratio\u003c\/b\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eC6\u003c\/td\u003e\n\u003ctd\u003e1220mm\u003c\/td\u003e\n\u003ctd\u003ef\/8\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eC8\u003c\/td\u003e\n\u003ctd\u003e1450mm\u003c\/td\u003e\n\u003ctd\u003ef\/7.1\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eC9.25\u003c\/td\u003e\n\u003ctd\u003e1525mm\u003c\/td\u003e\n\u003ctd\u003ef\/6.5\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eC11\u003c\/td\u003e\n\u003ctd\u003e1760mm\u003c\/td\u003e\n\u003ctd\u003ef\/6.3\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eC14\u003c\/td\u003e\n\u003ctd\u003e2365mm\u003c\/td\u003e\n\u003ctd\u003ef\/6.7\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e\u003ci\u003e* The SCT Corrector has a reduction factor of 0.63x, but the C6 and C8 are actually closer to f\/11 natively, and they have a shorter backfocus compared to the larger scopes so the reduction is a bit less.  The C14 is f\/11 natively.\u003cbr\u003e\u003c\/i\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eCamera Adapters\u003c\/b\u003e\u003c\/p\u003e\n\u003cp\u003eThe SCT Corrector IV has a nominal image circle of 27mm, accommodating most popular CCDs and DSLRs. For larger format cameras, check out our\u003cspan\u003e \u003c\/span\u003e\u003ca href=\"https:\/\/starizona.com\/products\/starizona-sct-corrector-lf-large-format-reducer-coma-corrector\"\u003eSCT Corrector LF.\u003c\/a\u003e\u003c\/p\u003e\n\u003cp\u003eBecause the backfocus of the SCT Corrector IV is fairly critical, for best performance Starizona makes a variety of camera adapters, and custom adapters are also easy to make for less-common camera setups.\u003c\/p\u003e\n\u003cp\u003eThe nominal backfocus is 90.3mm from the base of the threads on the camera side of the SCT Corrector IV. For the largest compatible cameras, this should be kept within +\/-2mm, while smaller format cameras may work fine at slightly larger tolerances. If we do not have the correct length or style adapter you need, we can gladly make the correct part to get the best performance from your setup. Please contact with any questions on making your camera configuration work.\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eTelescope Adapters\u003c\/b\u003e\u003c\/p\u003e\n\u003cp\u003eThe SCT Corrector IV, like the original SCT Corrector, has a 2\" barrel that allows it to fit into a 2\" visual back or 2\" focuser. If your telescope does not have such an adapter, we recommend our\u003cspan\u003e \u003c\/span\u003e\u003ca href=\"https:\/\/starizona.com\/products\/virtual-view-2-rotating-visual-back-standard-sct-threads?_pos=1\u0026amp;_sid=0c2397a02\u0026amp;_ss=r\"\u003eVirtual View\u003c\/a\u003e\u003cspan\u003e \u003c\/span\u003erotating visual back, which allows for easily changing the camera orientation without loosening any lock screws.\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eFilters\u003c\/b\u003e\u003c\/p\u003e\n\u003cp\u003eThe front (telescope side) of the SCT Corrector IV is threaded to accept standard 2\" (48mm) filters.\u003c\/p\u003e\n\u003cp align=\"center\"\u003e\u003cb\u003eGallery of Images from the Original f\/7.5 SCT Corrector\u003c\/b\u003e\u003c\/p\u003e\n\u003cp align=\"center\"\u003eImages by Kfir Simon with a Meade 12\" LX200 and SBIG ST-8300M camera: \u003c\/p\u003e\n\u003cdiv style=\"text-align: center;\"\u003e\u003ca href=\"https:\/\/starizona.com\/store\/images\/products\/sctcorr\/bubble_kfir_simon_1200.jpg\"\u003e\u003cimg style=\"float: none;\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0327\/2569\/6648\/files\/bubble_kfir_simon_300.jpg?v=1612490646\"\u003e\u003c\/a\u003e\u003c\/div\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cdiv style=\"text-align: center;\"\u003e\u003ca href=\"https:\/\/starizona.com\/store\/images\/products\/sctcorr\/m101_kfir_simon_1200.jpg\"\u003e\u003cimg style=\"float: none;\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0327\/2569\/6648\/files\/m101_kfir_simon_300.jpg?v=1612490646\"\u003e\u003c\/a\u003e\u003c\/div\u003e\n\u003cdiv style=\"text-align: center;\"\u003e\u003c\/div\u003e\n\u003cdiv style=\"text-align: center;\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0327\/2569\/6648\/files\/crescent_kfir_simon_300.jpg?v=1612490646\"\u003e\u003c\/div\u003e\n\u003cdiv style=\"text-align: center;\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0327\/2569\/6648\/files\/ring_kfir_simon_300.jpg?v=1612490646\"\u003e\u003c\/div\u003e\n\u003cdiv style=\"text-align: center;\"\u003e\u003c\/div\u003e\n\u003cdiv style=\"text-align: left;\"\u003e\n\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e0.63x focal reduction factor\u003c\/li\u003e\n\u003cli\u003e2.5x faster than SCT's native f\/10\u003c\/li\u003e\n\u003cli\u003e1.4x faster than original f\/7.5 SCT Corrector design\u003c\/li\u003e\n\u003cli\u003e27mm image circle\u003c\/li\u003e\n\u003cli\u003e2\" barrel diameter\u003c\/li\u003e\n\u003cli\u003e2.5\" length excluding threads\u003c\/li\u003e\n\u003cli\u003eThreaded for 48mm filters\u003c\/li\u003e\n\u003cli\u003eSCT Corrector Top Thread: M42 x 0.75mm T-thread\u003c\/li\u003e\n\u003cli\u003eMechanical Backfocus (thread shelf to focal plane): 90.3mm (3.56”)\u003c\/li\u003e\n\u003cli\u003eBlack anodized, machined aluminum housing\u003c\/li\u003e\n\u003cli\u003eFully multi-coated optics\u003c\/li\u003e\n\u003cli\u003e5-element optical design with extra-low dispersion (ED) glass\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eIn the Box\u003c\/h3\u003e\n\u003cp\u003eCorrector 0.63X\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003eCaps\u003c\/p\u003e\n\u003ch3\u003eManual \u0026amp; Warranty\u003c\/h3\u003e\n\u003cp\u003eStarizona 1-Year Warranty\u003c\/p\u003e\n\u003cp\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/Starizona-SCT-Corrector-III-0.63x-Manual.pdf?v=1669832244\" target=\"_blank\"\u003eStarizona SCT Corrector IV 0.63x Manual\u003c\/a\u003e\u003c\/p\u003e\n\u003c\/div\u003e","brand":"Starizona","offers":[{"title":"Default Title","offer_id":43125736505573,"sku":"SZA-SCTCORR-4","price":559.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/starizona-sct-corrector-iv-0-63x-reducer-coma-corrector-sctcorr-4-astronomy-plus-1_59288164-5337-4dc3-aea5-7240310a93dc.png?v=1690484387","url":"https:\/\/istronomyplus.com\/products\/starizona-sct-corrector-iv-0-63x-reducer-coma-corrector-sctcorr-4","provider":"Astronomy Plus – Telescopes \u0026 Astrophotography Canada","version":"1.0","type":"link"}