{"product_id":"starizona-sct-corrector-adapter-for-55mm-backfocus","title":"Starizona SCT Corrector - Adapter for 55mm Backfocus","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003eReduces SCT Corrector back focus to a standard 55mm\u003c\/li\u003e\n\u003cli\u003eFunctions as a 35.3mm T-to-T spacer\u003c\/li\u003e\n\u003cli\u003eFeatures M42 female to M42 male threads\u003c\/li\u003e\n\u003cli\u003eAvailable in versions for older (I\/II) and newer (III\/IV) correctors\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c!-- more --\u003e\n\u003cul class=\"tabs\"\u003e\n\u003cli class=\"active\"\u003eDescription\u003c\/li\u003e\n\u003cli\u003eFAQ\u003c\/li\u003e\n\u003cli\u003eSpecifications\u003c\/li\u003e\n\u003cli\u003eIn the Box\u003c\/li\u003e\n\u003cli\u003eWarranty\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul class=\"tabs-content\"\u003e\n\u003cli class=\"active\"\u003e\n\u003cdiv\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section-center\"\u003e\n\u003ch2\u003eSCT Corrector - Adapter for 55mm Backfocus\u003c\/h2\u003e\n\u003cp\u003eThis Starizona SCT Corrector Adapter is a precision T-to-T spacer designed to achieve the industry-standard 55mm back focus for your imaging train. By occupying 35.3mm of the Starizona SCT Corrector's native 90.3mm back focus, this adapter leaves exactly 55mm of spacing for your camera and accessories. This simplifies your setup and ensures correct spacing for optimal optical performance.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eAchieving Standard 55mm Back Focus\u003c\/h3\u003e\n\u003cp\u003eThis 35.3mm adapter simplifies imaging train calculations by converting the Starizona SCT corrector's 90.3mm back focus to the common 55mm standard used by most DSLR cameras with T-rings and many dedicated astronomy cameras. For example, it provides the correct spacing for ZWO cooled cameras when using their stock 16.5mm and 21mm adapters. It is critical to select the correct version for your corrector: the \"Older\" adapter is for Corrector versions I and II, while the \"Newer\" adapter is for versions III and IV. Note that this adapter is included with the purchase of a new Starizona SCT Corrector IV 0.63x Reducer\/Coma Corrector.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\n\u003cli\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat is the purpose of the Starizona SCT Corrector Adapter?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eIt is a \u003cstrong\u003e35.3mm spacer\u003c\/strong\u003e with M42 threads that reduces the 90.3mm back focus of a Starizona SCT Corrector to the standard 55mm required by most cameras and imaging accessories. This ensures your camera sensor is placed at the optimal distance for a sharp, corrected field.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow do I choose between the 'Newer' and 'Older' versions of this adapter?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYou must match the adapter to your specific Starizona SCT Corrector.\n\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eChoose the \u003cstrong\u003eOlder (Corrector II)\u003c\/strong\u003e version if you have a Starizona SCT Corrector Version I or II.\u003c\/li\u003e\n\u003cli\u003eChoose the \u003cstrong\u003eNewer (Corrector IV)\u003c\/strong\u003e version if you have a Starizona SCT Corrector Version III or IV.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eDo I need to buy this adapter if I am buying the Starizona SCT Corrector IV?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eNo. If you are purchasing the Starizona SCT Corrector IV 0.63x Reducer\/ Coma Corrector, this adapter is already included with your purchase and does not need to be bought separately.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\n\u003cli\u003e\n\u003ctable class=\"DAV-specifications\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eFunction\u003c\/td\u003e\n\u003ctd\u003eBack Focus Adapter\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eLength\u003c\/td\u003e\n\u003ctd\u003e35.3mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInitial Back Focus\u003c\/td\u003e\n\u003ctd\u003e90.3mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eResulting Back Focus\u003c\/td\u003e\n\u003ctd\u003e55mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eThreads\u003c\/td\u003e\n\u003ctd\u003eM42 Female to M42 Male (T-to-T)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCompatibility Options\u003c\/td\u003e\n\u003ctd\u003eOlder (For Corrector I\/II), Newer (For Corrector III\/IV)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/li\u003e\n\n\u003cli\u003e\n\u003cul class=\"DAV-grid\"\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eSCT Corrector Adapter for 55mm Backfocus\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\n\u003cli\u003e\n\u003ca href=\"https:\/\/davidastro.com\/pages\/starizona-warranty-policy\" rel=\"noopener\" target=\"_blank\"\u003eStarizona Warranty\u003c\/a\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Starizona","offers":[{"title":"Newer (Corrector IV)","offer_id":68033922728221,"sku":"STZ-ADP-SCTCORR-V4","price":40.0,"currency_code":"USD","in_stock":true},{"title":"Older (Corrector II)","offer_id":68033922760989,"sku":"STZ-ADP-SCTCORR-V2","price":40.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Starizona-SCT-Corrector-Adapter-for-55mm-Backfocus-1_e6868ddf-d277-4eb0-af8e-1aa73b477be6.jpg?v=1794375582","url":"https:\/\/davidastro.com\/en-int\/products\/starizona-sct-corrector-adapter-for-55mm-backfocus","provider":"David Astro","version":"1.0","type":"link"}