{"title":"Adaptateurs Orion Optics UK","description":"\u003cp\u003eLes adaptateurs Orion Optics UK relient caméras, correcteurs et oculaires aux télescopes Orion Optics UK au bon backfocus. La gamme comprend des bagues fixes 85mm vers filetages M54x0.75, M42, 2\" et AP 2.7\" ou en coulant 1.25\" et 3\", des adaptateurs Atlas ZTA et des adaptateurs Wynne AG pour M42x0.75, M48x0.75 et caméras QSI.\u003c\/p\u003e\u003cp\u003eChaque fiche indique le backfocus utilisé, souvent avec quelques millimètres de réglage, pour s'adapter à votre caméra et à votre roue à filtres.\u003c\/p\u003e","products":[{"product_id":"orion-optics-uk-ag-wynne-adpt-for-m42x0-75-t-thread-uses-24mm-bfd-4mm","title":"Orion Optics UK AG Wynne adpt for M42x0.75 T thread uses 24mm BFD+- 4mm","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003eMachined to fit M42x0.75 T thread\u003c\/li\u003e\n\u003cli\u003e24mm back focal distance\u003c\/li\u003e\n\u003cli\u003eMounting adaptor only, no lens\u003c\/li\u003e\n\u003cli\u003eIndividually machined to order in the UK\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\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\u003eAG Wynne Corrector Adaptor -- M42x0.75 T thread\u003c\/h2\u003e\n\u003cp\u003eA mounting adaptor for Orion Optics UK's AG Wynne corrector, machined to fit M42x0.75 T thread, with a back focal distance of 24mm.\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\u003eMounting Only, No Lens\u003c\/h3\u003e\n\u003cp\u003eThis adaptor carries no lens of its own -- it mounts an AG Wynne corrector already fitted to an AG Astrograph.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ctable class=\"DAV-specifications\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eFits\u003c\/td\u003e\n\u003ctd\u003eM42x0.75 T thread\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBack focal distance\u003c\/td\u003e\n\u003ctd\u003e24mm (±4mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/li\u003e\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\"\u003eAG Wynne Corrector Adaptor -- M42x0.75 T thread\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\u003cli\u003e\n\u003ca href=\"https:\/\/davidastro.com\/pages\/orion-optics-uk-warranty-policy\" rel=\"noopener\" target=\"_blank\"\u003eOrion Optics UK 1-Year Warranty\u003c\/a\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Orion Optics UK","offers":[{"title":"Default Title","offer_id":52942383907101,"sku":"OOUK-AG-WYNNE-ADPT-M42X0-75","price":416.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Orion-Optics-UK-Logo_b6ca303b-77c9-485d-a128-c02d893add89.jpg?v=1789607392"},{"product_id":"orion-optics-uk-ag-wynne-adpt-for-m42x0-75-t-thread-uses-39mm-bfd-4mm","title":"Orion Optics UK AG Wynne adpt for M42x0.75 T thread uses 39mm BFD +-4mm","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003eMachined to fit M42x0.75 T thread\u003c\/li\u003e\n\u003cli\u003e39mm back focal distance\u003c\/li\u003e\n\u003cli\u003eMounting adaptor only, no lens\u003c\/li\u003e\n\u003cli\u003eIndividually machined to order in the UK\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\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\u003eAG Wynne Corrector Adaptor -- M42x0.75 T thread\u003c\/h2\u003e\n\u003cp\u003eA mounting adaptor for Orion Optics UK's AG Wynne corrector, machined to fit M42x0.75 T thread, with a back focal distance of 39mm.\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\u003eMounting Only, No Lens\u003c\/h3\u003e\n\u003cp\u003eThis adaptor carries no lens of its own -- it mounts an AG Wynne corrector already fitted to an AG Astrograph.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ctable class=\"DAV-specifications\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eFits\u003c\/td\u003e\n\u003ctd\u003eM42x0.75 T thread\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBack focal distance\u003c\/td\u003e\n\u003ctd\u003e39mm (±4mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/li\u003e\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\"\u003eAG Wynne Corrector Adaptor -- M42x0.75 T thread\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\u003cli\u003e\n\u003ca href=\"https:\/\/davidastro.com\/pages\/orion-optics-uk-warranty-policy\" rel=\"noopener\" target=\"_blank\"\u003eOrion Optics UK 1-Year Warranty\u003c\/a\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Orion Optics UK","offers":[{"title":"Default Title","offer_id":52942384070941,"sku":"OOUK-AG-WYNNE-ADPT-M42X0-75-2","price":416.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Orion-Optics-UK-Logo_f4ab4e79-44b3-4a83-bfbd-fca2f22d0eba.jpg?v=1789607400"},{"product_id":"orion-optics-uk-ag-wynne-adpt-for-qsi-m42x0-75-t-thread-50mmbfd-4mm","title":"Orion Optics UK AG Wynne adpt for QSI M42x0.75 T thread 50mmBFD +-4mm","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003eMachined to fit QSI M42x0.75 T thread\u003c\/li\u003e\n\u003cli\u003e50mm back focal distance\u003c\/li\u003e\n\u003cli\u003eMounting adaptor only, no lens\u003c\/li\u003e\n\u003cli\u003eIndividually machined to order in the UK\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\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\u003eAG Wynne Corrector Adaptor -- QSI M42x0.75 T thread\u003c\/h2\u003e\n\u003cp\u003eA mounting adaptor for Orion Optics UK's AG Wynne corrector, machined to fit QSI M42x0.75 T thread, with a back focal distance of 50mm.\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\u003eMounting Only, No Lens\u003c\/h3\u003e\n\u003cp\u003eThis adaptor carries no lens of its own -- it mounts an AG Wynne corrector already fitted to an AG Astrograph.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ctable class=\"DAV-specifications\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eFits\u003c\/td\u003e\n\u003ctd\u003eQSI M42x0.75 T thread\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBack focal distance\u003c\/td\u003e\n\u003ctd\u003e50mm (±4mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/li\u003e\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\"\u003eAG Wynne Corrector Adaptor -- QSI M42x0.75 T thread\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\u003cli\u003e\n\u003ca href=\"https:\/\/davidastro.com\/pages\/orion-optics-uk-warranty-policy\" rel=\"noopener\" target=\"_blank\"\u003eOrion Optics UK 1-Year Warranty\u003c\/a\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Orion Optics UK","offers":[{"title":"Default Title","offer_id":52942384169245,"sku":"OOUK-AG-WYNNE-ADPT-QSI-M42X0","price":416.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Orion-Optics-UK-Logo_8fca7c33-1666-4519-b17e-f55160fd92d4.jpg?v=1789607408"},{"product_id":"orion-optics-uk-ag-wynne-adpt-for-qsi-m42x0-75-t-thread-64mmbfd-4m","title":"Orion Optics UK AG Wynne adpt for QSI M42x0.75 T thread 64mmBFD +-4m","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003eMachined to fit QSI M42x0.75 T thread\u003c\/li\u003e\n\u003cli\u003e64mm back focal distance\u003c\/li\u003e\n\u003cli\u003eMounting adaptor only, no lens\u003c\/li\u003e\n\u003cli\u003eIndividually machined to order in the UK\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\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\u003eAG Wynne Corrector Adaptor -- QSI M42x0.75 T thread\u003c\/h2\u003e\n\u003cp\u003eA mounting adaptor for Orion Optics UK's AG Wynne corrector, machined to fit QSI M42x0.75 T thread, with a back focal distance of 64mm.\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\u003eMounting Only, No Lens\u003c\/h3\u003e\n\u003cp\u003eThis adaptor carries no lens of its own -- it mounts an AG Wynne corrector already fitted to an AG Astrograph.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ctable class=\"DAV-specifications\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eFits\u003c\/td\u003e\n\u003ctd\u003eQSI M42x0.75 T thread\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBack focal distance\u003c\/td\u003e\n\u003ctd\u003e64mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/li\u003e\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\"\u003eAG Wynne Corrector Adaptor -- QSI M42x0.75 T thread\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\u003cli\u003e\n\u003ca href=\"https:\/\/davidastro.com\/pages\/orion-optics-uk-warranty-policy\" rel=\"noopener\" target=\"_blank\"\u003eOrion Optics UK 1-Year Warranty\u003c\/a\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Orion Optics UK","offers":[{"title":"Default Title","offer_id":52942384365853,"sku":"OOUK-AG-WYNNE-ADPT-QSI-M42X0-2","price":416.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Orion-Optics-UK-Logo_0d9623b7-102b-4a1e-bb25-d5fb422e39da.jpg?v=1789607416"},{"product_id":"orion-optics-uk-ag-wynne-adpt-for-qsiwsg-m42x0-75-t-thread-29mmbfd-4mmadj","title":"Orion Optics UK AG Wynne adpt for QSIwsg M42x0.75 T thread 29mmBFD +4mmadj","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003eMachined to fit QSIwsg M42x0.75 T thread\u003c\/li\u003e\n\u003cli\u003e29mm back focal distance\u003c\/li\u003e\n\u003cli\u003eMounting adaptor only, no lens\u003c\/li\u003e\n\u003cli\u003eIndividually machined to order in the UK\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\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\u003eAG Wynne Corrector Adaptor -- QSIwsg M42x0.75 T thread\u003c\/h2\u003e\n\u003cp\u003eA mounting adaptor for Orion Optics UK's AG Wynne corrector, machined to fit QSIwsg M42x0.75 T thread, with a back focal distance of 29mm.\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\u003eMounting Only, No Lens\u003c\/h3\u003e\n\u003cp\u003eThis adaptor carries no lens of its own -- it mounts an AG Wynne corrector already fitted to an AG Astrograph.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ctable class=\"DAV-specifications\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eFits\u003c\/td\u003e\n\u003ctd\u003eQSIwsg M42x0.75 T thread\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBack focal distance\u003c\/td\u003e\n\u003ctd\u003e29mm (±4mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/li\u003e\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\"\u003eAG Wynne Corrector Adaptor -- QSIwsg M42x0.75 T thread\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\u003cli\u003e\n\u003ca href=\"https:\/\/davidastro.com\/pages\/orion-optics-uk-warranty-policy\" rel=\"noopener\" target=\"_blank\"\u003eOrion Optics UK 1-Year Warranty\u003c\/a\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Orion Optics UK","offers":[{"title":"Default Title","offer_id":52942384693533,"sku":"OOUK-AG-WYNNE-ADPT-QSIWSG-M42X0","price":416.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Orion-Optics-UK-Logo_4e5b04fb-58f2-4836-ab12-3d311fc7ac80.jpg?v=1789607424"},{"product_id":"orion-optics-uk-ag-wynne-adpt-for-qsiwsg-with-2-156-male-thread-using-25mm-bfd","title":"Orion Optics UK AG Wynne adpt for QSIwsg with 2.156\" male thread using 25mm BFD","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003eMachined to fit QSIwsg\u003c\/li\u003e\n\u003cli\u003e25mm back focal distance\u003c\/li\u003e\n\u003cli\u003eMounting adaptor only, no lens\u003c\/li\u003e\n\u003cli\u003eIndividually machined to order in the UK\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\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\u003eAG Wynne Corrector Adaptor -- QSIwsg\u003c\/h2\u003e\n\u003cp\u003eA mounting adaptor for Orion Optics UK's AG Wynne corrector, machined to fit QSIwsg, with a back focal distance of 25mm.\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\u003eMounting Only, No Lens\u003c\/h3\u003e\n\u003cp\u003eThis adaptor carries no lens of its own -- it mounts an AG Wynne corrector already fitted to an AG Astrograph.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ctable class=\"DAV-specifications\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eFits\u003c\/td\u003e\n\u003ctd\u003eQSIwsg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBack focal distance\u003c\/td\u003e\n\u003ctd\u003e25mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/li\u003e\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\"\u003eAG Wynne Corrector Adaptor -- QSIwsg\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\u003cli\u003e\n\u003ca href=\"https:\/\/davidastro.com\/pages\/orion-optics-uk-warranty-policy\" rel=\"noopener\" target=\"_blank\"\u003eOrion Optics UK 1-Year Warranty\u003c\/a\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Orion Optics UK","offers":[{"title":"Default Title","offer_id":52942385774877,"sku":"OOUK-AG-WYNNE-ADPT-QSIWSG-2","price":416.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Orion-Optics-UK-Logo_7bf87748-3d54-4b1b-9cec-c3b1349825a0.jpg?v=1789607432"},{"product_id":"orion-optics-uk-ag-wynne-visual-adp-screw-thread-to-focus-eyepieces","title":"Orion Optics UK AG Wynne VISUAL ADP. Screw thread to focus eyepieces.","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003eScrew-thread eyepiece adaptor\u003c\/li\u003e\n\u003cli\u003eFor visual use with the AG Wynne corrector\u003c\/li\u003e\n\u003cli\u003eIndividually machined to order in the UK\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\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\u003eAG Wynne Visual Adaptor\u003c\/h2\u003e\n\u003cp\u003eA visual adaptor for Orion Optics UK's AG Wynne corrector, with a screw thread for fitting eyepieces directly for visual use.\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\u003eVisual Use on the AG Range\u003c\/h3\u003e\n\u003cp\u003eFits an eyepiece directly to an AG Astrograph already carrying a Wynne corrector, for visual observing between imaging sessions.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ctable class=\"DAV-specifications\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eFits\u003c\/td\u003e\n\u003ctd\u003eAG Wynne corrector, eyepiece screw thread\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/li\u003e\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\"\u003eAG Wynne Visual Adaptor\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\u003cli\u003e\n\u003ca href=\"https:\/\/davidastro.com\/pages\/orion-optics-uk-warranty-policy\" rel=\"noopener\" target=\"_blank\"\u003eOrion Optics UK 1-Year Warranty\u003c\/a\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Orion Optics UK","offers":[{"title":"Default Title","offer_id":52942385873181,"sku":"OOUK-AG-WYNNE-VISUAL-ADP-SCREW","price":416.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Orion-Optics-UK-Logo_658c707a-ad9a-4ff8-9fef-c9437224a746.jpg?v=1789607441"},{"product_id":"orion-optics-uk-ag-wynne-adpt-for-m42x0-75-t-thread-uses-18mmbfd-with-4mm-adj","title":"Orion Optics UK AG Wynne adpt for M42x0.75 T thread uses 18mmBFD with +-4mm adj","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003eMachined to fit M42x0.75 T thread\u003c\/li\u003e\n\u003cli\u003e18mm back focal distance\u003c\/li\u003e\n\u003cli\u003eMounting adaptor only, no lens\u003c\/li\u003e\n\u003cli\u003eIndividually machined to order in the UK\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\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\u003eAG Wynne Corrector Adaptor -- M42x0.75 T thread\u003c\/h2\u003e\n\u003cp\u003eA mounting adaptor for Orion Optics UK's AG Wynne corrector, machined to fit M42x0.75 T thread, with a back focal distance of 18mm.\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\u003eMounting Only, No Lens\u003c\/h3\u003e\n\u003cp\u003eThis adaptor carries no lens of its own -- it mounts an AG Wynne corrector already fitted to an AG Astrograph.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ctable class=\"DAV-specifications\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eFits\u003c\/td\u003e\n\u003ctd\u003eM42x0.75 T thread\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBack focal distance\u003c\/td\u003e\n\u003ctd\u003e18mm (±4mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/li\u003e\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\"\u003eAG Wynne Corrector Adaptor -- M42x0.75 T thread\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\u003cli\u003e\n\u003ca href=\"https:\/\/davidastro.com\/pages\/orion-optics-uk-warranty-policy\" rel=\"noopener\" target=\"_blank\"\u003eOrion Optics UK 1-Year Warranty\u003c\/a\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Orion Optics UK","offers":[{"title":"Default Title","offer_id":52942386004253,"sku":"OOUK-AG-WYNNE-ADPT-M42X0-75-3","price":416.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Orion-Optics-UK-Logo_d6c88234-70ba-4022-b70d-fe92bb5efb59.jpg?v=1789607449"},{"product_id":"orion-optics-uk-ag-wynne-adpt-for-m42x0-75-t-thread-uses-61mmbfd-4mm-adj","title":"Orion Optics UK AG Wynne adpt for M42x0.75 T thread uses 61mmBFD +-4mm adj","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003eMachined to fit M42x0.75 T thread\u003c\/li\u003e\n\u003cli\u003e61mm back focal distance\u003c\/li\u003e\n\u003cli\u003eMounting adaptor only, no lens\u003c\/li\u003e\n\u003cli\u003eIndividually machined to order in the UK\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\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\u003eAG Wynne Corrector Adaptor -- M42x0.75 T thread\u003c\/h2\u003e\n\u003cp\u003eA mounting adaptor for Orion Optics UK's AG Wynne corrector, machined to fit M42x0.75 T thread, with a back focal distance of 61mm.\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\u003eMounting Only, No Lens\u003c\/h3\u003e\n\u003cp\u003eThis adaptor carries no lens of its own -- it mounts an AG Wynne corrector already fitted to an AG Astrograph.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ctable class=\"DAV-specifications\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eFits\u003c\/td\u003e\n\u003ctd\u003eM42x0.75 T thread\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBack focal distance\u003c\/td\u003e\n\u003ctd\u003e61mm (±4mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/li\u003e\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\"\u003eAG Wynne Corrector Adaptor -- M42x0.75 T thread\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\u003cli\u003e\n\u003ca href=\"https:\/\/davidastro.com\/pages\/orion-optics-uk-warranty-policy\" rel=\"noopener\" target=\"_blank\"\u003eOrion Optics UK 1-Year Warranty\u003c\/a\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Orion Optics UK","offers":[{"title":"Default Title","offer_id":52942386102557,"sku":"OOUK-AG-WYNNE-ADPT-M42X0-75-4","price":416.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Orion-Optics-UK-Logo_62cae312-0572-47fa-9439-57760a1be34a.jpg?v=1789607457"},{"product_id":"orion-optics-uk-ag-wynne-adpt-for-m42x0-75-t-thread-uses-25mm-bfd-with-4mm-adj","title":"Orion Optics UK AG Wynne Adapter for M42 T-Thread","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003eDesigned for Orion Optics UK AG Wynne Correctors\u003c\/li\u003e\n\u003cli\u003eSets a Nominal 25mm Back Focus Distance\u003c\/li\u003e\n\u003cli\u003eProvides ±4mm of Fine Adjustment (21mm to 29mm Range)\u003c\/li\u003e\n\u003cli\u003eConnects to Cameras via a Standard M42x0.75 T-Thread\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\u003eOrion Optics UK AG Wynne Adapter for M42 T-Thread\u003c\/h2\u003e\n\u003cp\u003eThe Orion Optics UK AG Wynne Adapter for M42x0.75 T-thread cameras establishes a precise 25mm back focus distance, with a critical ±4mm adjustment range to achieve a perfectly flat field with fast astrograph optics.\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\u003ePrecision Back Focus Control: 25mm BFD with ±4mm Adjustment\u003c\/h3\u003e\n\u003cp\u003eHigh-performance Wynne correctors require exact sensor spacing to deliver their designed image quality. This adapter sets the nominal back focus at 25mm and provides a ±4mm adjustment range, allowing you to dial in the perfect distance from 21mm to 29mm. This fine control is essential for compensating for variations in filter wheels, off-axis guiders, and camera sensor depths, ensuring sharp stars across the entire image field.\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\u003eM42x0.75 T-Thread Interface: Secure Connection for Imaging Trains\u003c\/h3\u003e\n\u003cp\u003eThe output features a standard M42x0.75 male T-thread, ensuring direct, secure compatibility with the vast majority of dedicated astronomy cameras and DSLR\/mirrorless T-rings. This rigid, threaded connection prevents tilt and flexure within the imaging train, preserving the precise optical alignment demanded by fast astrograph systems from Orion Optics UK.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat is the primary purpose of the Orion Optics UK AG Wynne Adapter?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThis adapter is designed to connect an astronomy camera with standard M42x0.75 T-threads to an Orion Optics UK AG Wynne corrector. Its main function is to set the precise back focus distance required for optimal optical correction, which is nominally \u003cstrong\u003e25mm\u003c\/strong\u003e, and allow for fine-tuning.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhy is the ±4mm adjustment on the AG Wynne Adapter so important?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe \u003cstrong\u003e±4mm adjustment range\u003c\/strong\u003e is critical for achieving a perfectly flat field. Every component in your imaging train (filters, off-axis guiders, sensor covers) affects the optical path length. This adjustment allows you to compensate for these differences and dial in the exact sensor-to-corrector spacing for the sharpest possible stars from edge to edge.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat cameras are compatible with the AG Wynne Adapter's M42x0.75 T-thread?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe M42x0.75 T-thread is the industry standard for most dedicated astronomy cameras from brands like ZWO, QHY, Atik, and others. It is also compatible with DSLR and mirrorless cameras when they are fitted with a corresponding M42 T-ring.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eIf I use a ZWO camera with a 17.5mm back focus and a 5mm filter, can I use the AG Wynne Adapter?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes. Your required back focus would be approximately 17.5mm + 5mm = 22.5mm. The Orion Optics UK AG Wynne Adapter has an adjustment range from 21mm (25mm - 4mm) to 29mm (25mm + 4mm), which comfortably includes the 22.5mm distance you need.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow do I set the 25mm back focus precisely with the AG Wynne Adapter?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe adapter is designed around a nominal 25mm distance. You would start by setting it to the midpoint of its adjustment. Then, take test exposures and analyze the star shapes in the corners of your image. Adjust the spacing in small increments using the ±4mm range until the corner stars are as round and sharp as the stars in the center.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eIs this AG Wynne Adapter compatible with correctors from other brands?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThis adapter is specifically engineered for the optical and mechanical requirements of \u003cstrong\u003eOrion Optics UK AG Wynne correctors\u003c\/strong\u003e. While the threads may be physically compatible with other components, using it with a different corrector is not recommended, as it may not provide the correct back focus or mechanical stability for that specific optical design.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ctable class=\"DAV-specifications\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eProduct Type\u003c\/td\u003e\n\u003ctd\u003eWynne Corrector Adapter\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTarget Back Focus\u003c\/td\u003e\n\u003ctd\u003e25mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAdjustment Range\u003c\/td\u003e\n\u003ctd\u003e±4mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCamera Connection\u003c\/td\u003e\n\u003ctd\u003eM42x0.75 T-Thread (Male)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCompatibility\u003c\/td\u003e\n\u003ctd\u003eOrion Optics UK AG Astrographs with Wynne Correctors\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/li\u003e\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\"\u003eAG Wynne adapter for M42x0.75 T thread\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\u003cli\u003e\u003ca href=\"https:\/\/davidastro.com\/pages\/orion-optics-uk-warranty-policy\" rel=\"noopener\" target=\"_blank\"\u003eOrion Optics UK 1-Year Warranty\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Orion Optics UK","offers":[{"title":"Default Title","offer_id":52942386200861,"sku":"OOUK-AG-WYNNE-ADPT-M42X0-75-5","price":416.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Orion-Optics-UK-Logo_63ab6427-bcf4-4448-90ed-78433722099f.jpg?v=1789607465"},{"product_id":"orion-optics-uk-ag-wynne-adt-2-part-m48x0-75-37mm-and-17mmbfd-4mm-adj","title":"Orion Optics UK AG Wynne adt 2 part M48x0.75 (37mm and 17mmBFD) 4mm adj","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003eTwo-part mounting adaptor\u003c\/li\u003e\n\u003cli\u003eM48x0.75 thread\u003c\/li\u003e\n\u003cli\u003e37mm and 17mm BFD stages\u003c\/li\u003e\n\u003cli\u003eIndividually machined to order in the UK\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\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\u003eAG Wynne Corrector Adaptor -- M48x0.75, 2-Part\u003c\/h2\u003e\n\u003cp\u003eA two-part mounting adaptor for Orion Optics UK's AG Wynne corrector, machined to fit M48x0.75 thread.\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\u003eMounting Only, No Lens\u003c\/h3\u003e\n\u003cp\u003eThis adaptor carries no lens of its own -- it mounts an AG Wynne corrector already fitted to an AG Astrograph.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ctable class=\"DAV-specifications\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eThread\u003c\/td\u003e\n\u003ctd\u003eM48x0.75\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStages\u003c\/td\u003e\n\u003ctd\u003e37mm and 17mm BFD\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAdjustment\u003c\/td\u003e\n\u003ctd\u003e±4mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/li\u003e\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\"\u003eAG Wynne 2-Part Adaptor\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\u003cli\u003e\n\u003ca href=\"https:\/\/davidastro.com\/pages\/orion-optics-uk-warranty-policy\" rel=\"noopener\" target=\"_blank\"\u003eOrion Optics UK 1-Year Warranty\u003c\/a\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Orion Optics UK","offers":[{"title":"Default Title","offer_id":52942386299165,"sku":"OOUK-AG-WYNNE-ADT-2-PART","price":416.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Orion-Optics-UK-Logo_37f5b3ef-8e42-4321-a889-0824ab817de8.jpg?v=1789607473"},{"product_id":"orion-optics-uk-atlas-zta-to-corr-locking-device-using-65mm-bfd","title":"Orion Optics UK Atlas ZTA to Corr locking device using 65mm BFD","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003eMachined to fit Corr locking device\u003c\/li\u003e\n\u003cli\u003e65mm back focal distance\u003c\/li\u003e\n\u003cli\u003eFor the FLI Atlas focuser system\u003c\/li\u003e\n\u003cli\u003eIndividually machined to order in the UK\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\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\u003eAtlas ZTA Adaptor -- Corr locking device\u003c\/h2\u003e\n\u003cp\u003eAn Atlas ZTA adaptor machined to fit Corr locking device, with a back focal distance of 65mm.\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\u003ePart of the Atlas Focuser System\u003c\/h3\u003e\n\u003cp\u003eOrion Optics UK's range of camera and focuser adaptors for the FLI Atlas focuser used on the AG Astrograph range.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ctable class=\"DAV-specifications\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eFits\u003c\/td\u003e\n\u003ctd\u003eCorr locking device\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBack focal distance\u003c\/td\u003e\n\u003ctd\u003e65mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/li\u003e\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\"\u003eAtlas ZTA Adaptor -- Corr locking device\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\u003cli\u003e\n\u003ca href=\"https:\/\/davidastro.com\/pages\/orion-optics-uk-warranty-policy\" rel=\"noopener\" target=\"_blank\"\u003eOrion Optics UK 1-Year Warranty\u003c\/a\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Orion Optics UK","offers":[{"title":"Default Title","offer_id":52942389379357,"sku":"OOUK-ATLAS-ZTA-CORR-LOCKING-DEVICE","price":715.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Orion-Optics-UK-Logo_19c604d6-3069-45e1-9ada-79981a7a6dd8.jpg?v=1789607481"},{"product_id":"orion-optics-uk-atlas-zta-to-2-7-24-tpi-astro-physics-using-5mm-bfd","title":"Orion Optics UK Atlas ZTA to 2.7\" 24 TPI Astro Physics using 5mm BFD","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003eMachined to fit 2.7\" 24 TPI Astro Physics\u003c\/li\u003e\n\u003cli\u003e5mm back focal distance\u003c\/li\u003e\n\u003cli\u003eFor the FLI Atlas focuser system\u003c\/li\u003e\n\u003cli\u003eIndividually machined to order in the UK\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\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\u003eAtlas ZTA Adaptor -- 2.7\" 24 TPI Astro Physics\u003c\/h2\u003e\n\u003cp\u003eAn Atlas ZTA adaptor machined to fit 2.7\" 24 TPI Astro Physics, with a back focal distance of 5mm.\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\u003ePart of the Atlas Focuser System\u003c\/h3\u003e\n\u003cp\u003eOrion Optics UK's range of camera and focuser adaptors for the FLI Atlas focuser used on the AG Astrograph range.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ctable class=\"DAV-specifications\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eFits\u003c\/td\u003e\n\u003ctd\u003e2.7\" 24 TPI Astro Physics\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBack focal distance\u003c\/td\u003e\n\u003ctd\u003e5mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/li\u003e\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\"\u003eAtlas ZTA Adaptor -- 2.7\" 24 TPI Astro Physics\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\u003cli\u003e\n\u003ca href=\"https:\/\/davidastro.com\/pages\/orion-optics-uk-warranty-policy\" rel=\"noopener\" target=\"_blank\"\u003eOrion Optics UK 1-Year Warranty\u003c\/a\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Orion Optics UK","offers":[{"title":"Default Title","offer_id":52942393606429,"sku":"OOUK-ATLAS-ZTA-2-7-24","price":322.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Orion-Optics-UK-Logo_354ee0d5-fe4e-4381-960c-4ad5e448b1b7.jpg?v=1789607490"},{"product_id":"orion-optics-uk-atlas-zta-to-far-85-using-5mm-bfd","title":"Orion Optics UK Atlas ZTA to FAR 85 using 5mm BFD","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003eMachined to fit FAR 85\u003c\/li\u003e\n\u003cli\u003e5mm back focal distance\u003c\/li\u003e\n\u003cli\u003eFor the FLI Atlas focuser system\u003c\/li\u003e\n\u003cli\u003eIndividually machined to order in the UK\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\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\u003eAtlas ZTA Adaptor -- FAR 85\u003c\/h2\u003e\n\u003cp\u003eAn Atlas ZTA adaptor machined to fit FAR 85, with a back focal distance of 5mm.\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\u003ePart of the Atlas Focuser System\u003c\/h3\u003e\n\u003cp\u003eOrion Optics UK's range of camera and focuser adaptors for the FLI Atlas focuser used on the AG Astrograph range.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ctable class=\"DAV-specifications\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eFits\u003c\/td\u003e\n\u003ctd\u003eFAR 85\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBack focal distance\u003c\/td\u003e\n\u003ctd\u003e5mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/li\u003e\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\"\u003eAtlas ZTA Adaptor -- FAR 85\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\u003cli\u003e\n\u003ca href=\"https:\/\/davidastro.com\/pages\/orion-optics-uk-warranty-policy\" rel=\"noopener\" target=\"_blank\"\u003eOrion Optics UK 1-Year Warranty\u003c\/a\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Orion Optics UK","offers":[{"title":"Default Title","offer_id":52942398226717,"sku":"OOUK-ATLAS-ZTA-FAR-85-5MM","price":322.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Orion-Optics-UK-Logo_70c9da07-8bb6-4a42-8d3d-e5ac87d01f62.jpg?v=1789607501"},{"product_id":"orion-optics-uk-85mm-fixed-adaptor-ring-10mm-bfd","title":"Orion Optics UK 85mm Fixed Adaptor Ring - 10mm BFD","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003eDesigned for 85mm optical trains\u003c\/li\u003e\n\u003cli\u003eProvides a fixed 10mm of back focus distance (BFD)\u003c\/li\u003e\n\u003cli\u003eEnsures rigid, non-flexing spacing for astrophotography\u003c\/li\u003e\n\u003cli\u003eMachined for precise component alignment\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\u003eOrion Optics UK 85mm Fixed Adaptor Ring - 10mm BFD\u003c\/h2\u003e\n\u003cp\u003eThe Orion Optics UK 85mm Fixed Adaptor Ring provides a precise 10mm of back focus distance (BFD), a critical component for achieving the exact spacing required by field flatteners and coma correctors in an 85mm optical train. This ring ensures your camera sensor is placed at the optimal focal plane, a non-negotiable requirement for sharp, aberration-free stars across the entire field of view.\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\u003ePrecision 10mm Spacing for 85mm Imaging Systems\u003c\/h3\u003e\n\u003cp\u003eIn astrophotography, back focus is not an approximation. This fixed 10mm adaptor provides a solid, non-flexing extension to guarantee that the distance from your corrector to your sensor is exact. Unlike variable or sliding adapters, this solid ring eliminates a potential source of tilt, ensuring your optical components remain perfectly parallel to the sensor.\u003c\/p\u003e\n\u003cp\u003eEngineered by Orion Optics UK for their high-end imaging systems, this 85mm ring is the solution for building a rigid and reliable optical train. It is an essential part for imagers who need repeatable, perfect spacing session after session without the uncertainty of adjustable components.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat is the purpose of the Orion Optics UK 85mm Fixed Adaptor Ring?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThis adaptor ring serves one critical function: to add exactly \u003cstrong\u003e10mm of spacing\u003c\/strong\u003e into an \u003cstrong\u003e85mm\u003c\/strong\u003e-threaded optical train. This is most often required to achieve the precise back focus distance specified by a coma corrector or field flattener to ensure a flat, sharp field of view for astrophotography.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow do I know if I need the 10mm BFD adaptor ring for my setup?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYou need this 10mm ring if the total back focus requirement of your corrector (e.g., 55mm) minus the back focus of your camera and other accessories (like a filter wheel or off-axis guider) leaves a 10mm gap. Always calculate the total spacing of your existing components first to determine the exact extension length you need.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat is the advantage of a fixed 10mm ring over a variable spacer?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eA fixed ring like this Orion Optics UK 85mm adaptor offers superior \u003cstrong\u003erigidity and stability\u003c\/strong\u003e. Variable spacers can introduce flex or tilt into the imaging train, which can ruin an image by causing elongated stars in the corners. A fixed, solid ring ensures all components are held perfectly parallel, which is crucial for high-resolution imaging.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWill the 85mm fixed adaptor ring introduce tilt in my imaging train?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eNo, the primary benefit of a high-quality fixed adaptor is its ability to \u003cstrong\u003eprevent tilt\u003c\/strong\u003e. It is machined to tight tolerances to ensure flat, parallel faces. This provides a much more secure and orthogonal connection between optical components than adjustable or multi-part solutions, preserving the alignment of your imaging system.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eI'm using an Orion Optics UK ODK telescope. Is the 10mm BFD ring the right part to achieve focus with my camera?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eIt depends entirely on your specific corrector and camera combination. Orion Optics UK systems have precise back focus requirements. You must consult the documentation for your specific corrector (e.g., the Optimized Dall-Kirkham's corrector) to find its required back focus distance, then measure the back focus of your camera and any other accessories. This 10mm ring is the correct choice only if your calculation reveals a 10mm spacing deficit.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eIs this 85mm adaptor ring compatible with accessories from other brands?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eWhile designed by Orion Optics UK, this adaptor should be compatible with any component that uses a standard 85mm thread. However, it is crucial to verify the thread pitch and type (e.g., M85x1) of your existing components to ensure a proper fit. Compatibility is based on matching mechanical dimensions, not brand names.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ctable class=\"DAV-specifications\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eAdaptor Diameter\u003c\/td\u003e\n\u003ctd\u003e85mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSpacing Provided\u003c\/td\u003e\n\u003ctd\u003e10mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cul class=\"DAV-grid\"\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"https:\/\/davidastro.com\/pages\/orion-optics-uk-warranty-policy\" rel=\"noopener\" target=\"_blank\"\u003eOrion Optics UK 1-Year Warranty\u003c\/a\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Orion Optics UK","offers":[{"title":"Default Title","offer_id":52942408974621,"sku":"OOUK-85MM-FIXED-ADAPTOR-RING-10MM","price":198.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Orion-Optics-UK-Logo_630036c9-fcc9-4e6f-827c-2632c5b1318e.jpg?v=1789607525"},{"product_id":"orion-optics-uk-85mm-fixed-adaptor-ring-15mm-bfd","title":"Orion Optics UK 85mm Fixed Adaptor Ring - 15mm BFD","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003e85mm Connection Diameter\u003c\/li\u003e\n\u003cli\u003eProvides 15mm of Fixed Back Focus\u003c\/li\u003e\n\u003cli\u003eCNC-Machined for Rigidity\u003c\/li\u003e\n\u003cli\u003eDesigned for Orion Optics UK Imaging Trains\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\u003eOrion Optics UK 85mm Fixed Adaptor Ring - 15mm BFD\u003c\/h2\u003e\n\u003cp\u003eThe Orion Optics UK 85mm fixed adaptor ring is a precision-machined component that establishes a rigid 15mm back focus distance (BFD) in your imaging train. This single-piece solution is engineered to eliminate the potential for tilt and flexure common with stacked or adjustable spacers, ensuring your camera sensor is perfectly orthogonal to the optical axis.\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\u003ePrecise 15mm Spacing for Correctors and Imagers\u003c\/h3\u003e\n\u003cp\u003eAchieving the exact back focus specified by a field flattener or coma corrector is critical for sharp, round stars across the entire image frame. This 85mm fixed adaptor creates exactly 15mm of spacing, removing the guesswork from your setup. It provides a solid, repeatable connection between your Orion Optics UK corrector and your imaging camera for consistent, high-fidelity results.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat is the purpose of the Orion Optics UK 85mm fixed adaptor ring?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThis adaptor sets a precise, fixed spacing of \u003cstrong\u003e15mm\u003c\/strong\u003e between two components in an optical train, typically a coma corrector or field flattener and an imaging camera. Using a fixed spacer is essential for achieving the optimal performance from your telescope's optics.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat does \"15mm BFD\" mean for this adaptor?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003e\u003cstrong\u003eBFD\u003c\/strong\u003e stands for Back Focus Distance. This adaptor provides a fixed mechanical spacing of exactly 15mm, contributing to the total back focus requirement of your specific optical system.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhy use this fixed 15mm BFD adaptor instead of an adjustable one?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eFixed adaptors offer superior rigidity and repeatability. They eliminate the possibility of tilt or flexure that can occur with adjustable spacers, ensuring a perfectly solid and orthogonal connection that maintains collimation and optical alignment.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWill this 85mm adaptor fit my telescope's focuser?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe \u003cstrong\u003e85mm\u003c\/strong\u003e dimension refers to the specific thread or flange diameter this ring is designed to connect with, which is common on certain large-format Orion Optics UK focusers and correctors. You must verify that the components you intend to connect have a matching 85mm interface before purchasing.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eMy corrector needs 55mm of back focus. Can I use this Orion Optics UK 15mm adaptor?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes, but only as part of a complete spacing solution. This ring provides exactly 15mm of the total 55mm required. You would need to combine it with other spacers (e.g., a 40mm spacer) to achieve the full distance from the corrector's flange to the camera sensor.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eIs this Orion Optics UK adaptor threaded?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes, as a dedicated adaptor ring, it is designed to thread securely onto other components. However, the specific thread pitch (e.g., M85x1) is not specified, so you should confirm compatibility with the Orion Optics UK components you intend to use it with.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ctable class=\"DAV-specifications\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eAdapter Type\u003c\/td\u003e\n\u003ctd\u003eFixed Spacer Ring\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInterface Diameter\u003c\/td\u003e\n\u003ctd\u003e85mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eProvided Back Focus\u003c\/td\u003e\n\u003ctd\u003e15mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eManufacturer\u003c\/td\u003e\n\u003ctd\u003eOrion Optics UK\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/li\u003e\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\"\u003e85mm Fixed Adaptor Ring (15mm BFD)\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\u003cli\u003e\n\u003ca href=\"https:\/\/davidastro.com\/pages\/orion-optics-uk-warranty-policy\" rel=\"noopener\" target=\"_blank\"\u003eOrion Optics UK 1-Year Warranty\u003c\/a\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Orion Optics UK","offers":[{"title":"Default Title","offer_id":52942412808477,"sku":"OOUK-85MM-FIXED-ADAPTOR-RING-15MM","price":198.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Orion-Optics-UK-Logo_8571e988-2f1b-4418-8f01-58cd3cfdb82b.jpg?v=1789607534"},{"product_id":"orion-optics-uk-85mm-fixed-adaptor-ring-1-1-4-push-fit-with-15mm-bfd","title":"Orion Optics UK 85mm fixed adaptor ring - 1 1\/4\" push fit with 15mm BFD","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003eFits 1 1\/4\" push fit with\u003c\/li\u003e\n\u003cli\u003e15mm back focal distance\u003c\/li\u003e\n\u003cli\u003eFor AG and ODK telescopes\u003c\/li\u003e\n\u003cli\u003eIndividually machined to order in the UK\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\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\u003e85mm Fixed Adaptor Ring -- 1 1\/4\" push fit with\u003c\/h2\u003e\n\u003cp\u003eAn 85mm fixed adaptor ring machined to fit 1 1\/4\" push fit with with a back focal distance of 15mm.\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\u003eMounting Cameras and Accessories\u003c\/h3\u003e\n\u003cp\u003eFor mounting cameras and accessories to Orion Optics UK's AG and ODK telescopes at the fixed 85mm ring interface.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ctable class=\"DAV-specifications\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eFits\u003c\/td\u003e\n\u003ctd\u003e1 1\/4\" push fit with\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBack focal distance\u003c\/td\u003e\n\u003ctd\u003e15mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/li\u003e\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\"\u003e85mm Fixed Adaptor Ring\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\u003cli\u003e\n\u003ca href=\"https:\/\/davidastro.com\/pages\/orion-optics-uk-warranty-policy\" rel=\"noopener\" target=\"_blank\"\u003eOrion Optics UK 1-Year Warranty\u003c\/a\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Orion Optics UK","offers":[{"title":"Default Title","offer_id":52942416478493,"sku":"OOUK-85MM-FIXED-ADAPTOR-RING-1","price":322.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Orion-Optics-UK-Logo_689752ca-aa8b-441a-b4d1-d7a4c5a669a3.jpg?v=1789607542"},{"product_id":"orion-optics-uk-85mm-fixed-adaptor-ring-2-push-fit-with-15mm-bfd","title":"Orion Optics UK 85mm fixed adaptor ring - 2\" push fit with 15mm BFD","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003eFits 2\" push fit with\u003c\/li\u003e\n\u003cli\u003e15mm back focal distance\u003c\/li\u003e\n\u003cli\u003eFor AG and ODK telescopes\u003c\/li\u003e\n\u003cli\u003eIndividually machined to order in the UK\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\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\u003e85mm Fixed Adaptor Ring -- 2\" push fit with\u003c\/h2\u003e\n\u003cp\u003eAn 85mm fixed adaptor ring machined to fit 2\" push fit with with a back focal distance of 15mm.\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\u003eMounting Cameras and Accessories\u003c\/h3\u003e\n\u003cp\u003eFor mounting cameras and accessories to Orion Optics UK's AG and ODK telescopes at the fixed 85mm ring interface.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ctable class=\"DAV-specifications\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eFits\u003c\/td\u003e\n\u003ctd\u003e2\" push fit with\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBack focal distance\u003c\/td\u003e\n\u003ctd\u003e15mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/li\u003e\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\"\u003e85mm Fixed Adaptor Ring\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\u003cli\u003e\n\u003ca href=\"https:\/\/davidastro.com\/pages\/orion-optics-uk-warranty-policy\" rel=\"noopener\" target=\"_blank\"\u003eOrion Optics UK 1-Year Warranty\u003c\/a\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Orion Optics UK","offers":[{"title":"Default Title","offer_id":52942420377885,"sku":"OOUK-85MM-FIXED-ADAPTOR-RING-2","price":311.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Orion-Optics-UK-Logo_6b6c4d08-b466-4639-b3bc-5c010e82a122.jpg?v=1789607551"},{"product_id":"orion-optics-uk-85mm-fixed-adaptor-ring-2-push-fit-with-35mm-bfd-4mm","title":"Orion Optics UK 85mm fixed adaptor ring - 2\" push fit with 35mm bfd+-4mm","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003eFits 2\" push fit with\u003c\/li\u003e\n\u003cli\u003e35mm back focal distance\u003c\/li\u003e\n\u003cli\u003eFor AG and ODK telescopes\u003c\/li\u003e\n\u003cli\u003eIndividually machined to order in the UK\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\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\u003e85mm Fixed Adaptor Ring -- 2\" push fit with\u003c\/h2\u003e\n\u003cp\u003eAn 85mm fixed adaptor ring machined to fit 2\" push fit with with a back focal distance of 35mm.\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\u003eMounting Cameras and Accessories\u003c\/h3\u003e\n\u003cp\u003eFor mounting cameras and accessories to Orion Optics UK's AG and ODK telescopes at the fixed 85mm ring interface.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ctable class=\"DAV-specifications\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eFits\u003c\/td\u003e\n\u003ctd\u003e2\" push fit with\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBack focal distance\u003c\/td\u003e\n\u003ctd\u003e35mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/li\u003e\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\"\u003e85mm Fixed Adaptor Ring\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\u003cli\u003e\n\u003ca href=\"https:\/\/davidastro.com\/pages\/orion-optics-uk-warranty-policy\" rel=\"noopener\" target=\"_blank\"\u003eOrion Optics UK 1-Year Warranty\u003c\/a\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Orion Optics UK","offers":[{"title":"Default Title","offer_id":52942424244509,"sku":"OOUK-85MM-FIXED-ADAPTOR-RING-2-2","price":311.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Orion-Optics-UK-Logo_eef81597-248c-427d-abc6-2168cb00c320.jpg?v=1789607559"},{"product_id":"orion-optics-uk-85mm-fixed-adaptor-ring-2-push-fit-with-49mm-bfd-4mm","title":"Orion Optics UK 85mm fixed adaptor ring - 2\" push fit with 49mm bfd+-4mm","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003eFits 2\" push fit with\u003c\/li\u003e\n\u003cli\u003e49mm back focal distance\u003c\/li\u003e\n\u003cli\u003eFor AG and ODK telescopes\u003c\/li\u003e\n\u003cli\u003eIndividually machined to order in the UK\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\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\u003e85mm Fixed Adaptor Ring -- 2\" push fit with\u003c\/h2\u003e\n\u003cp\u003eAn 85mm fixed adaptor ring machined to fit 2\" push fit with with a back focal distance of 49mm.\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\u003eMounting Cameras and Accessories\u003c\/h3\u003e\n\u003cp\u003eFor mounting cameras and accessories to Orion Optics UK's AG and ODK telescopes at the fixed 85mm ring interface.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ctable class=\"DAV-specifications\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eFits\u003c\/td\u003e\n\u003ctd\u003e2\" push fit with\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBack focal distance\u003c\/td\u003e\n\u003ctd\u003e49mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/li\u003e\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\"\u003e85mm Fixed Adaptor Ring\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\u003cli\u003e\n\u003ca href=\"https:\/\/davidastro.com\/pages\/orion-optics-uk-warranty-policy\" rel=\"noopener\" target=\"_blank\"\u003eOrion Optics UK 1-Year Warranty\u003c\/a\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Orion Optics UK","offers":[{"title":"Default Title","offer_id":52942427029789,"sku":"OOUK-85MM-FIXED-ADAPTOR-RING-2-3","price":311.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Orion-Optics-UK-Logo_7fb91f11-90dc-4969-8b32-f49ab6a57409.jpg?v=1789607567"},{"product_id":"orion-optics-uk-85mm-fixed-adaptor-ring-to-ap2-7-female-thread-12mm-bfd","title":"Orion Optics UK 85mm fixed adaptor ring to AP2.7\" female thread 12mm BFD","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003eFits AP2.7\" female thread\u003c\/li\u003e\n\u003cli\u003e12mm back focal distance\u003c\/li\u003e\n\u003cli\u003eFor AG and ODK telescopes\u003c\/li\u003e\n\u003cli\u003eIndividually machined to order in the UK\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\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\u003e85mm Fixed Adaptor Ring -- AP2.7\" female thread\u003c\/h2\u003e\n\u003cp\u003eAn 85mm fixed adaptor ring machined to fit AP2.7\" female thread with a back focal distance of 12mm.\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\u003eMounting Cameras and Accessories\u003c\/h3\u003e\n\u003cp\u003eFor mounting cameras and accessories to Orion Optics UK's AG and ODK telescopes at the fixed 85mm ring interface.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ctable class=\"DAV-specifications\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eFits\u003c\/td\u003e\n\u003ctd\u003eAP2.7\" female thread\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBack focal distance\u003c\/td\u003e\n\u003ctd\u003e12mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/li\u003e\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\"\u003e85mm Fixed Adaptor Ring\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\u003cli\u003e\n\u003ca href=\"https:\/\/davidastro.com\/pages\/orion-optics-uk-warranty-policy\" rel=\"noopener\" target=\"_blank\"\u003eOrion Optics UK 1-Year Warranty\u003c\/a\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Orion Optics UK","offers":[{"title":"Default Title","offer_id":52942430142749,"sku":"OOUK-85MM-FIXED-ADAPTOR-RING-AP2","price":353.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Orion-Optics-UK-Logo_c37c92e2-58ce-4fec-b1cc-d7ceb0fe05f3.jpg?v=1789607576"},{"product_id":"orion-optics-uk-85mm-fixed-adaptor-ring-20mm-bfd","title":"Orion Optics UK 85mm Fixed Adaptor Ring with 20mm BFD","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003eConnects to 85mm threaded correctors and focusers\u003c\/li\u003e\n\u003cli\u003eProvides a fixed 20mm back focus distance (BFD)\u003c\/li\u003e\n\u003cli\u003eEnsures rigid, non-flexing camera connection\u003c\/li\u003e\n\u003cli\u003eDesigned for Orion Optics UK imaging systems\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\u003eOrion Optics UK 85mm Fixed Adaptor Ring with 20mm BFD\u003c\/h2\u003e\n\u003cp\u003eThe Orion Optics UK 85mm Fixed Adaptor Ring is a precision-machined component designed to establish a critical 20mm of back focus distance in an astrophotography imaging train. This single-piece solution provides a rigid, tilt-free connection between large-format correctors and your camera setup.\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 20mm Back Focus with 85mm Threads\u003c\/h3\u003e\n\u003cp\u003eThis fixed adaptor ring is an essential component for connecting imaging cameras to Orion Optics UK correctors that utilize a large 85mm thread. It establishes the exact 20mm back focus distance required for the optical corrector to deliver a flat field, ensuring sharp stars from the center to the edge of your sensor. Machined for a secure, non-flexing connection, this ring eliminates a common source of tilt and spacing errors that can compromise image quality in demanding astrophotography setups.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat is the primary purpose of the Orion Optics UK 85mm fixed adaptor ring?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eIts sole function is to set a precise, rigid \u003cstrong\u003e20mm spacing\u003c\/strong\u003e between an optical corrector with an \u003cstrong\u003e85mm thread\u003c\/strong\u003e and the next component in the imaging train, typically leading to the camera sensor. This spacing is essential for achieving optimal optical correction and a flat field.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eIf my coma corrector requires 55mm of back focus, can I use this 20mm BFD adaptor ring?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eNo. This adaptor provides a fixed 20mm distance. You would need a different combination of spacers that add up to the required 55mm. Using the wrong spacing will result in poor star shapes and field curvature.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eI'm connecting a camera with 17.5mm of back focus to my Orion Optics UK corrector. Will this 20mm adaptor be enough?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThis 20mm ring is just one component in your total back focus calculation. You must account for the distance required by the corrector (e.g., 55mm) and subtract the camera's own back focus (17.5mm) and the spacing this ring provides (20mm) to determine what additional spacers you need. Always calculate the full imaging train distance from the corrector's flange to the sensor.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhy use a fixed 20mm BFD ring instead of a variable spacer?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eA fixed, single-piece adaptor like this 85mm ring provides a more rigid and stable connection than stacking multiple smaller spacers or using a variable extender. This significantly minimizes the risk of tilt, which is critical for achieving a perfectly flat imaging field with large sensors.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eIs the 85mm thread on this adaptor a standard size?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe 85mm thread is specific to certain larger format correctors and focusers, particularly those from Orion Optics UK. It is not a common standard like M42 or M48 threads, so you must confirm your equipment uses an 85mm thread before purchasing.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eMy stars are elongated in the corners. Could this 85mm adaptor ring be the cause?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eIf the adaptor is providing the correct 20mm of spacing as part of a properly calculated back focus distance, it is unlikely to be the cause. Elongated corner stars are the classic sign of incorrect back focus. Double-check the total spacing requirement for your specific corrector and ensure all components in your imaging train add up to that exact distance.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ctable class=\"DAV-specifications\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eAdaptor Thread\u003c\/td\u003e\n\u003ctd\u003e85mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBack Focus Distance (BFD)\u003c\/td\u003e\n\u003ctd\u003e20mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBrand\u003c\/td\u003e\n\u003ctd\u003eOrion Optics UK\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/li\u003e\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\"\u003e85mm fixed adaptor ring 20mm BFD\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\u003cli\u003e\n\u003ca href=\"https:\/\/davidastro.com\/pages\/orion-optics-uk-warranty-policy\" rel=\"noopener\" target=\"_blank\"\u003eOrion Optics UK 1-Year Warranty\u003c\/a\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Orion Optics UK","offers":[{"title":"Default Title","offer_id":52942434533661,"sku":"OOUK-85MM-FIXED-ADAPTOR-RING-20MM","price":198.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Orion-Optics-UK-Logo_bd506535-9b1d-4ab1-8d6f-258eec09f072.jpg?v=1789607585"},{"product_id":"orion-optics-uk-85mm-fixed-adaptor-ring-25mm-bfd","title":"Orion Optics UK 85mm Fixed Adaptor Ring - 25mm BFD","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003eConnects to 85mm threaded correctors and accessories\u003c\/li\u003e\n\u003cli\u003eProvides a fixed 25mm of back focus distance (BFD)\u003c\/li\u003e\n\u003cli\u003eEngineered for Orion Optics UK imaging systems\u003c\/li\u003e\n\u003cli\u003eSolid, single-piece construction prevents flexure and tilt\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\u003eOrion Optics UK 85mm Fixed Adaptor Ring - 25mm BFD\u003c\/h2\u003e\n\u003cp\u003eThe Orion Optics UK 85mm fixed adaptor ring provides a precise 25mm of back focus distance (BFD), an essential component for achieving a perfectly flat field with specific Orion Optics UK correctors and imaging systems. This adapter ensures your camera sensor is placed at the exact focal plane required for sharp, pinpoint stars across the entire frame.\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\u003eThe Orion Optics UK 25mm BFD Adapter for 85mm Correctors\u003c\/h3\u003e\n\u003cp\u003eThis adapter is designed to integrate seamlessly into imaging trains that utilize an 85mm thread, common on larger field flatteners and coma correctors from Orion Optics UK. Achieving the specified 25mm back focus is not optional; it is a critical requirement for the optical system to perform as designed, eliminating field curvature and other aberrations.\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\u003eWhy a Fixed 25mm Spacer Beats Adjustable Rings\u003c\/h3\u003e\n\u003cp\u003eWhile adjustable spacers offer flexibility, this fixed 25mm adapter provides absolute rigidity. Its single-piece metal construction eliminates the possibility of tilt or flexure that can occur in adjustable, multi-part extension tubes, especially under the load of a heavy astronomy camera. For serious astrophotography, this mechanical stability is key to consistent, high-quality data.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat is the purpose of the Orion Optics UK 85mm fixed adaptor ring?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThis ring is a precision spacer. Its sole function is to connect to an \u003cstrong\u003e85mm threaded component\u003c\/strong\u003e in your optical train and provide exactly \u003cstrong\u003e25mm of back focus distance\u003c\/strong\u003e. This ensures your camera's sensor is positioned at the precise distance required by your telescope's field flattener or coma corrector for optimal performance.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow do I know if I need exactly 25mm of back focus for my Orion Optics UK telescope?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe required back focus distance is determined by the specific corrector or flattener you are using, not the telescope itself. You should consult the technical documentation for your Orion Optics UK corrector to confirm if it requires a 25mm spacing for your imaging setup.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eCan I use this 85mm adapter with other brands of telescopes or correctors?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eWhile it may be physically compatible with any system that uses an 85mm thread, this adapter is specifically machined to provide the 25mm back focus required by certain Orion Optics UK components. Using it with other systems may not place your sensor at the correct distance, potentially degrading image quality.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhy is this Orion Optics UK adapter a fixed 25mm length instead of being adjustable?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eA fixed-length adapter offers superior mechanical stability. Unlike adjustable spacers, which can introduce sag or tilt from their multiple threaded parts, a single-piece fixed adapter ensures a rigid, perfectly aligned connection. This is critical for preventing misshapen stars, especially with heavier cameras.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWill this 85mm adapter introduce any tilt into my imaging train?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eNo. This adapter is precision-machined as a single, solid component to prevent tilt. Its primary advantage over adjustable or stacked solutions is the guarantee of a square, rigid connection between your corrector and the next element in your imaging train.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat imaging setup would require a 25mm spacer like this one?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eAn example setup would be connecting an Orion Optics UK coma corrector with an 85mm output thread to an off-axis guider or filter wheel that leaves a remaining 25mm distance requirement to reach the camera sensor's focal plane. This adapter fills that specific gap precisely.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ctable class=\"DAV-specifications\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eAdapter Type\u003c\/td\u003e\n\u003ctd\u003eFixed Adaptor Ring \/ Spacer\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eConnection Diameter\u003c\/td\u003e\n\u003ctd\u003e85mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBack Focus Provided\u003c\/td\u003e\n\u003ctd\u003e25mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBrand\u003c\/td\u003e\n\u003ctd\u003eOrion Optics UK\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/li\u003e\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\"\u003e85mm fixed adaptor ring (25mm BFD)\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\u003cli\u003e\n\u003ca href=\"https:\/\/davidastro.com\/pages\/orion-optics-uk-warranty-policy\" rel=\"noopener\" target=\"_blank\"\u003eOrion Optics UK 1-Year Warranty\u003c\/a\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Orion Optics UK","offers":[{"title":"Default Title","offer_id":52942437941533,"sku":"OOUK-85MM-FIXED-ADAPTOR-RING-25MM","price":198.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Orion-Optics-UK-Logo_bcbcb78a-51d1-4c59-b783-e00d99d291c7.jpg?v=1789607593"},{"product_id":"orion-optics-uk-85mm-fixed-adaptor-ring-3-push-fit-with-15mm-bfd","title":"Orion Optics UK 85mm fixed adaptor ring - 3\" push fit with 15mm BFD","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003eFits 3\" push fit with\u003c\/li\u003e\n\u003cli\u003e15mm back focal distance\u003c\/li\u003e\n\u003cli\u003eFor AG and ODK telescopes\u003c\/li\u003e\n\u003cli\u003eIndividually machined to order in the UK\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\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\u003e85mm Fixed Adaptor Ring -- 3\" push fit with\u003c\/h2\u003e\n\u003cp\u003eAn 85mm fixed adaptor ring machined to fit 3\" push fit with with a back focal distance of 15mm.\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\u003eMounting Cameras and Accessories\u003c\/h3\u003e\n\u003cp\u003eFor mounting cameras and accessories to Orion Optics UK's AG and ODK telescopes at the fixed 85mm ring interface.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ctable class=\"DAV-specifications\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eFits\u003c\/td\u003e\n\u003ctd\u003e3\" push fit with\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBack focal distance\u003c\/td\u003e\n\u003ctd\u003e15mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/li\u003e\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\"\u003e85mm Fixed Adaptor Ring\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\u003cli\u003e\n\u003ca href=\"https:\/\/davidastro.com\/pages\/orion-optics-uk-warranty-policy\" rel=\"noopener\" target=\"_blank\"\u003eOrion Optics UK 1-Year Warranty\u003c\/a\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Orion Optics UK","offers":[{"title":"Default Title","offer_id":52942441185565,"sku":"OOUK-85MM-FIXED-ADAPTOR-RING-3","price":322.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Orion-Optics-UK-Logo_6c04841b-d2e2-4d4d-a28c-7599f94ac738.jpg?v=1789607601"},{"product_id":"orion-optics-uk-85mm-fixed-adaptor-ring-30mm-bfd","title":"Orion Optics UK 85mm Fixed Adaptor Ring with 30mm BFD","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003eProvides a fixed 30mm back focus distance\u003c\/li\u003e\n\u003cli\u003eDesigned for 85mm threaded interfaces\u003c\/li\u003e\n\u003cli\u003eSolid, single-piece construction for maximum rigidity\u003c\/li\u003e\n\u003cli\u003eMachined in the UK by Orion Optics\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\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\u003eOrion Optics UK 85mm Fixed Adaptor Ring with 30mm BFD\u003c\/h2\u003e\n      \u003cp\u003eThe Orion Optics UK 85mm fixed adaptor ring is a precision-machined spacer that provides exactly 30mm of back focus distance (BFD), essential for building a rigid and accurate imaging train for astrophotography.\u003c\/p\u003e\n    \u003c\/div\u003e\n  \u003c\/div\u003e\n\n  \u003cdiv class=\"DAV-bg-light\"\u003e\n    \u003cdiv class=\"DAV-section\"\u003e\n      \u003ch3\u003eAchieving a Fixed 30mm Back Focus with an 85mm Interface\u003c\/h3\u003e\n      \u003cp\u003eIn astrophotography, achieving the precise back focus specified by a field flattener or reducer is critical for sharp stars across the entire frame. This 85mm fixed adaptor ring is engineered to provide exactly 30mm of spacing, eliminating the guesswork and potential flexure of adjustable systems.\u003c\/p\u003e\n      \u003cp\u003eThe single-piece design ensures a perfectly rigid connection between your components, preventing tilt that can ruin an otherwise perfect image. While it lacks the flexibility of variable spacers, its strength and precision make it the ideal choice when your required spacing is exactly 30mm.\u003c\/p\u003e\n      \u003cul\u003e\n        \u003cli\u003e\n\u003cstrong\u003eZero Flexure:\u003c\/strong\u003e The solid, fixed-length construction is inherently more stable than multi-part adjustable spacers, ensuring your camera sensor remains perfectly parallel to the focal plane.\u003c\/li\u003e\n        \u003cli\u003e\n\u003cstrong\u003ePrecise Spacing:\u003c\/strong\u003e Delivers a non-negotiable 30mm of distance, crucial for optical correctors that have strict back focus tolerances for optimal performance.\u003c\/li\u003e\n        \u003cli\u003e\n\u003cstrong\u003eLarge Aperture:\u003c\/strong\u003e The 85mm diameter provides a wide, unvignetted light path suitable for large format sensors when used with a compatible optical system.\u003c\/li\u003e\n      \u003c\/ul\u003e\n    \u003c\/div\u003e\n  \u003c\/div\u003e\n\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 Orion Optics UK 85mm fixed adaptor ring?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003eThis component is a precision spacer. It's designed to establish an exact \u003cstrong\u003e30mm distance\u003c\/strong\u003e between two parts of an optical train that use an \u003cstrong\u003e85mm thread\u003c\/strong\u003e, such as between a focuser and a camera setup. This is critical for achieving the correct back focus distance required by field flatteners or coma correctors.\u003c\/p\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion\"\u003e\n    \u003ch3 class=\"DAV-accordion-Q\"\u003eWhat does \"30mm BFD\" mean for my astrophotography setup?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003eBFD stands for \u003cstrong\u003eBack Focus Distance\u003c\/strong\u003e. Most optical correctors require the imaging sensor to be placed at a very specific distance to deliver sharp, aberration-free stars. This 30mm adaptor ring is used as a component to help achieve that exact total distance.\u003c\/p\u003e\n  \u003c\/div\u003e\n    \u003cdiv class=\"DAV-accordion\"\u003e\n    \u003ch3 class=\"DAV-accordion-Q\"\u003eIs this 85mm adaptor compatible with my specific telescope or camera?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003eCompatibility is determined by the physical threads on your equipment. This adaptor is designed for an \u003cstrong\u003e85mm diameter threaded interface\u003c\/strong\u003e. You must confirm that the components you intend to connect both have matching 85mm threads before purchasing.\u003c\/p\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion\"\u003e\n    \u003ch3 class=\"DAV-accordion-Q\"\u003eWhy should I choose a fixed 30mm adaptor instead of an adjustable spacer?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003eA fixed adaptor like this Orion Optics UK ring offers superior \u003cstrong\u003erigidity and stability\u003c\/strong\u003e. It eliminates the potential for tilt or flexure that can be introduced by adjustable, multi-part spacers, ensuring a solid and square connection. The trade-off is its lack of adjustability; it is only useful when you need exactly 30mm of spacing.\u003c\/p\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion\"\u003e\n    \u003ch3 class=\"DAV-accordion-Q\"\u003eHow do I calculate if the Orion Optics UK 30mm ring is the right spacer for my imaging train?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003eFirst, identify the total back focus requirement of your flattener or reducer (e.g., 55mm is common). Next, add up the back focus contributed by your camera, filter wheel, and any other accessories. If the remaining distance needed is exactly 30mm, this adaptor is the correct component for your setup.\u003c\/p\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion\"\u003e\n    \u003ch3 class=\"DAV-accordion-Q\"\u003eWill this Orion Optics UK 85mm adaptor cause vignetting with my full-frame sensor?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003eThe large \u003cstrong\u003e85mm clear aperture\u003c\/strong\u003e of this ring is generally sufficient to prevent it from being the source of vignetting, even with full-frame sensors. However, vignetting is a property of the entire optical system, so final performance also depends on your telescope's focuser, corrector, and any other adaptors in the light path.\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\u003eInterface Diameter\u003c\/td\u003e\n\u003ctd\u003e85mm\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eBack Focus Provided\u003c\/td\u003e\n\u003ctd\u003e30mm\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eType\u003c\/td\u003e\n\u003ctd\u003eFixed Adaptor Ring \/ Spacer\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eManufacturer\u003c\/td\u003e\n\u003ctd\u003eOrion Optics UK\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\"\u003e85mm fixed adaptor ring (30mm BFD)\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\/orion-optics-uk-warranty-policy\" rel=\"noopener\" target=\"_blank\"\u003eOrion Optics UK 1-Year Warranty\u003c\/a\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Orion Optics UK","offers":[{"title":"Default Title","offer_id":52942444462365,"sku":"OOUK-85MM-FIXED-ADAPTOR-RING-30MM","price":198.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Orion-Optics-UK-Logo_de5a0fcc-efa5-4e9f-9631-1705d8c28210.jpg?v=1789607609"},{"product_id":"orion-optics-uk-85mm-fixed-adaptor-ring-40mm-bfd","title":"Orion Optics UK 85mm fixed adaptor ring 40mm BFD","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003e85mm fixed ring\u003c\/li\u003e\n\u003cli\u003e40mm back focal distance\u003c\/li\u003e\n\u003cli\u003eFor AG and ODK telescopes\u003c\/li\u003e\n\u003cli\u003eIndividually machined to order in the UK\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\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\u003e85mm Fixed Adaptor Ring\u003c\/h2\u003e\n\u003cp\u003eAn 85mm fixed adaptor ring with a back focal distance of 40mm.\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\u003eMounting Cameras and Accessories\u003c\/h3\u003e\n\u003cp\u003eFor mounting cameras and accessories to Orion Optics UK's AG and ODK telescopes at the fixed 85mm ring interface.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ctable class=\"DAV-specifications\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eFits\u003c\/td\u003e\n\u003ctd\u003e85mm ring interface\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBack focal distance\u003c\/td\u003e\n\u003ctd\u003e40mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/li\u003e\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\"\u003e85mm Fixed Adaptor Ring\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\u003cli\u003e\n\u003ca href=\"https:\/\/davidastro.com\/pages\/orion-optics-uk-warranty-policy\" rel=\"noopener\" target=\"_blank\"\u003eOrion Optics UK 1-Year Warranty\u003c\/a\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Orion Optics UK","offers":[{"title":"Default Title","offer_id":52942450983197,"sku":"OOUK-85MM-FIXED-ADAPTOR-RING-40MM","price":198.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Orion-Optics-UK-Logo_5efa9b18-f4e1-4ec9-a2ad-4572dea53c57.jpg?v=1789607625"},{"product_id":"orion-optics-uk-85mm-down-to-m42mm-thread-ao7-atik383l-using-15mm-bfd","title":"Orion Optics UK 85mm down to M42mm thread AO7, ATIK383L using 15mm BFD","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003e85mm down to M42mm thread AO7, ATIK383L\u003c\/li\u003e\n\u003cli\u003e15mm back focal distance\u003c\/li\u003e\n\u003cli\u003eFor AG and ODK telescopes\u003c\/li\u003e\n\u003cli\u003eIndividually machined to order in the UK\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\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\u003e85mm to M42mm thread AO7, ATIK383L Adaptor\u003c\/h2\u003e\n\u003cp\u003eAn 85mm down to M42mm thread AO7, ATIK383L adaptor, back focal distance 15mm.\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\u003eMounting Cameras and Accessories\u003c\/h3\u003e\n\u003cp\u003eFor mounting cameras and accessories to Orion Optics UK's AG and ODK telescopes.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ctable class=\"DAV-specifications\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eFits\u003c\/td\u003e\n\u003ctd\u003e85mm to M42mm thread AO7, ATIK383L\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBack focal distance\u003c\/td\u003e\n\u003ctd\u003e15mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/li\u003e\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\"\u003e85mm to M42mm thread AO7, ATIK383L Adaptor\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\u003cli\u003e\n\u003ca href=\"https:\/\/davidastro.com\/pages\/orion-optics-uk-warranty-policy\" rel=\"noopener\" target=\"_blank\"\u003eOrion Optics UK 1-Year Warranty\u003c\/a\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Orion Optics UK","offers":[{"title":"Default Title","offer_id":52942454227229,"sku":"OOUK-85MM-DOWN-M42MM-THREAD-AO7","price":353.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Orion-Optics-UK-Logo_027f92a8-bbe0-42c2-8bfe-b773fd6a66c7.jpg?v=1789607633"},{"product_id":"orion-optics-uk-85mm-fixed-adaptor-ring-5mm-bfd","title":"Orion Optics UK 85mm Fixed Adaptor Ring (5mm BFD)","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003e85mm Diameter Adaptor Ring\u003c\/li\u003e\n\u003cli\u003eProvides 5mm of Back Focus Distance (BFD)\u003c\/li\u003e\n\u003cli\u003eFixed, Non-Adjustable Spacer Design\u003c\/li\u003e\n\u003cli\u003eEnsures Rigid, Tilt-Free Connections\u003c\/li\u003e\n\u003cli\u003eManufactured by Orion Optics UK\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\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\u003eOrion Optics UK 85mm Fixed Adaptor Ring (5mm BFD)\u003c\/h2\u003e\n      \u003cp\u003eThe Orion Optics UK 85mm Fixed Adaptor Ring adds a precise 5mm of back focus distance to your imaging train, establishing the critical spacing required by field flatteners and coma correctors. With an inner diameter for 85mm-threaded components, this fixed-length ring provides a solid, non-flexing connection essential for long-exposure astrophotography.\u003c\/p\u003e\n    \u003c\/div\u003e\n  \u003c\/div\u003e\n\n  \u003cdiv class=\"DAV-bg-light\"\u003e\n    \u003cdiv class=\"DAV-section\"\u003e\n      \u003ch3\u003eFixed 5mm Spacer: The Key to Correct Back Focus\u003c\/h3\u003e\n      \u003cp\u003eOptical correctors, such as field flatteners or coma correctors, only work when the camera sensor is placed at an exact distance from their rear lens element. This 5mm fixed ring is a simple, robust solution for closing a small gap in your imaging train to hit that perfect distance. Unlike variable spacers, its fixed 5mm length is absolute, removing any chance of incorrect adjustment or slippage during an imaging run.\u003c\/p\u003e\n    \u003c\/div\u003e\n  \u003c\/div\u003e\n\n  \u003cdiv class=\"DAV-bg-light\"\u003e\n    \u003cdiv class=\"DAV-section\"\u003e\n      \u003ch3\u003e85mm Threaded Connection for Maximum Rigidity\u003c\/h3\u003e\n      \u003cp\u003eFor elite astrophotography, every component in the optical path must be rigidly secured to prevent tilt, which can elongate stars in the corners of your images. This Orion Optics UK 85mm adaptor provides a solid, threaded connection that maintains perfect alignment between your camera and telescope optics. Its precision-machined build ensures that your sensor remains perfectly perpendicular to the light path, preserving the sharpness your telescope is capable of delivering.\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 Orion Optics UK 85mm Fixed Adaptor Ring?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003eThis adaptor ring is a precision spacer designed to add exactly \u003cstrong\u003e5mm of back focus distance\u003c\/strong\u003e to an astrophotography imaging train. It's used to achieve the precise sensor-to-corrector distance required by field flatteners, reducers, or coma correctors for sharp, well-formed stars across the entire image.\u003c\/p\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion\"\u003e\n    \u003ch3 class=\"DAV-accordion-Q\"\u003eWhy should I use the 5mm fixed adaptor instead of an adjustable spacer?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003eA fixed spacer like the Orion Optics UK 5mm ring offers superior \u003cstrong\u003erigidity and reliability\u003c\/strong\u003e. Adjustable spacers can sometimes introduce tilt or slip under the weight of a heavy camera. A fixed ring provides a solid, non-moving connection, ensuring perfect optical alignment is maintained throughout your imaging session.\u003c\/p\u003e\n  \u003c\/div\u003e\n    \u003cdiv class=\"DAV-accordion\"\u003e\n    \u003ch3 class=\"DAV-accordion-Q\"\u003eHow do I know if I need this 5mm BFD adaptor for my setup?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003eCalculate the total back focus of your current imaging train. Start with the back focus requirement of your corrector (e.g., 55mm), then subtract the back focus provided by your camera, off-axis guider, and filter wheel. If the remaining gap is 5mm, this Orion Optics UK 85mm adaptor is the correct part to achieve perfect spacing.\u003c\/p\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion\"\u003e\n    \u003ch3 class=\"DAV-accordion-Q\"\u003eWill the Orion Optics UK 85mm adaptor introduce any tilt into my imaging train?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003eNo. The adaptor is precision-machined by Orion Optics UK to ensure its surfaces are perfectly parallel. When threaded correctly, it maintains the alignment of your optical components and is designed specifically to \u003cstrong\u003eeliminate sources of tilt\u003c\/strong\u003e, not create them.\u003c\/p\u003e\n  \u003c\/div\u003e\n    \u003cdiv class=\"DAV-accordion\"\u003e\n    \u003ch3 class=\"DAV-accordion-Q\"\u003eWill this 85mm adaptor work with my full-frame camera and Orion Optics UK telescope to avoid vignetting?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003eThe large 85mm diameter of this adaptor is designed to provide a wide, clear light path, making it suitable for systems using large correctors and full-frame sensors. It helps ensure that the field illumination from the telescope's optics is not constricted, minimizing vignetting on larger camera sensors.\u003c\/p\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion\"\u003e\n    \u003ch3 class=\"DAV-accordion-Q\"\u003eI'm connecting my AGX Newtonian's coma corrector to a filter wheel. How does the 85mm fixed adaptor help?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003eThe coma corrector on an Orion Optics UK AGX Newtonian has a strict back focus requirement for optimal performance. This 85mm fixed adaptor ring can be used as part of the spacer combination between the corrector and your filter wheel to precisely make up the required distance, ensuring round stars to the edge of the field with your specific setup.\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\u003eAdaptor Type\u003c\/td\u003e\n\u003ctd\u003eFixed Spacer Ring\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eDiameter\u003c\/td\u003e\n\u003ctd\u003e85mm\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eBack Focus Provided\u003c\/td\u003e\n\u003ctd\u003e5mm\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eManufacturer\u003c\/td\u003e\n\u003ctd\u003eOrion Optics UK\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\"\u003e85mm Fixed Adaptor Ring (5mm BFD)\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\/orion-optics-uk-warranty-policy\" rel=\"noopener\" target=\"_blank\"\u003eOrion Optics UK 1-Year Warranty\u003c\/a\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Orion Optics UK","offers":[{"title":"Default Title","offer_id":52942457504029,"sku":"OOUK-85MM-FIXED-ADAPTOR-RING-5MM","price":198.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Orion-Optics-UK-Logo_442a8800-b13b-4691-8467-527f6c9f4aa6.jpg?v=1789607641"},{"product_id":"orion-optics-uk-85mm-fixed-adaptor-ring-50mm-bfd","title":"Orion Optics UK 85mm fixed adaptor ring 50mm BFD","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003e85mm fixed ring\u003c\/li\u003e\n\u003cli\u003e50mm back focal distance\u003c\/li\u003e\n\u003cli\u003eFor AG and ODK telescopes\u003c\/li\u003e\n\u003cli\u003eIndividually machined to order in the UK\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\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\u003e85mm Fixed Adaptor Ring\u003c\/h2\u003e\n\u003cp\u003eAn 85mm fixed adaptor ring with a back focal distance of 50mm.\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\u003eMounting Cameras and Accessories\u003c\/h3\u003e\n\u003cp\u003eFor mounting cameras and accessories to Orion Optics UK's AG and ODK telescopes at the fixed 85mm ring interface.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ctable class=\"DAV-specifications\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eFits\u003c\/td\u003e\n\u003ctd\u003e85mm ring interface\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBack focal distance\u003c\/td\u003e\n\u003ctd\u003e50mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/li\u003e\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\"\u003e85mm Fixed Adaptor Ring\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\u003cli\u003e\n\u003ca href=\"https:\/\/davidastro.com\/pages\/orion-optics-uk-warranty-policy\" rel=\"noopener\" target=\"_blank\"\u003eOrion Optics UK 1-Year Warranty\u003c\/a\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Orion Optics UK","offers":[{"title":"Default Title","offer_id":52942460813597,"sku":"OOUK-85MM-FIXED-ADAPTOR-RING-50MM","price":198.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Orion-Optics-UK-Logo_1af2cec6-e961-4763-a694-e4190ffc9090.jpg?v=1789607649"},{"product_id":"orion-optics-uk-85mm-fixed-adaptor-ring-to-ao8-15mm-bfd","title":"Orion Optics UK 85mm fixed adaptor ring to AO8, 15mm BFD","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003eFits AO8,\u003c\/li\u003e\n\u003cli\u003e15mm back focal distance\u003c\/li\u003e\n\u003cli\u003eFor AG and ODK telescopes\u003c\/li\u003e\n\u003cli\u003eIndividually machined to order in the UK\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\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\u003e85mm Fixed Adaptor Ring -- AO8,\u003c\/h2\u003e\n\u003cp\u003eAn 85mm fixed adaptor ring machined to fit AO8, with a back focal distance of 15mm.\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\u003eMounting Cameras and Accessories\u003c\/h3\u003e\n\u003cp\u003eFor mounting cameras and accessories to Orion Optics UK's AG and ODK telescopes at the fixed 85mm ring interface.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ctable class=\"DAV-specifications\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eFits\u003c\/td\u003e\n\u003ctd\u003eAO8,\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBack focal distance\u003c\/td\u003e\n\u003ctd\u003e15mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/li\u003e\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\"\u003e85mm Fixed Adaptor Ring\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\u003cli\u003e\n\u003ca href=\"https:\/\/davidastro.com\/pages\/orion-optics-uk-warranty-policy\" rel=\"noopener\" target=\"_blank\"\u003eOrion Optics UK 1-Year Warranty\u003c\/a\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Orion Optics UK","offers":[{"title":"Default Title","offer_id":52942464057629,"sku":"OOUK-85MM-FIXED-ADAPTOR-RING-AO8","price":353.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Orion-Optics-UK-Logo_4a9a5d59-9173-40ba-a5b9-ff1837c4bb48.jpg?v=1789607657"},{"product_id":"orion-optics-uk-85mm-fixed-adaptor-ring-to-m54-x-0-75-thread-12mm-bfd","title":"Orion Optics UK 85mm fixed adaptor ring to M54 x 0.75 thread 12mm BFD","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003eFits M54 x 0.75 thread\u003c\/li\u003e\n\u003cli\u003e12mm back focal distance\u003c\/li\u003e\n\u003cli\u003eFor AG and ODK telescopes\u003c\/li\u003e\n\u003cli\u003eIndividually machined to order in the UK\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\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\u003e85mm Fixed Adaptor Ring -- M54 x 0.75 thread\u003c\/h2\u003e\n\u003cp\u003eAn 85mm fixed adaptor ring machined to fit M54 x 0.75 thread with a back focal distance of 12mm.\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\u003eMounting Cameras and Accessories\u003c\/h3\u003e\n\u003cp\u003eFor mounting cameras and accessories to Orion Optics UK's AG and ODK telescopes at the fixed 85mm ring interface.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ctable class=\"DAV-specifications\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eFits\u003c\/td\u003e\n\u003ctd\u003eM54 x 0.75 thread\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBack focal distance\u003c\/td\u003e\n\u003ctd\u003e12mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/li\u003e\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\"\u003e85mm Fixed Adaptor Ring\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\u003cli\u003e\n\u003ca href=\"https:\/\/davidastro.com\/pages\/orion-optics-uk-warranty-policy\" rel=\"noopener\" target=\"_blank\"\u003eOrion Optics UK 1-Year Warranty\u003c\/a\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Orion Optics UK","offers":[{"title":"Default Title","offer_id":52942466089245,"sku":"OOUK-85MM-FIXED-ADAPTOR-RING-M54","price":353.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Orion-Optics-UK-Logo_314a1a90-dfd6-4be9-a9e1-ba596695c0ed.jpg?v=1789607666"},{"product_id":"orion-optics-uk-85mm-fixed-adaptor-ring-to-2-thread-12mm-bfd","title":"Orion Optics UK 85mm fixed adaptor ring to 2\" thread 12mm BFD","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003eFits 2\" thread\u003c\/li\u003e\n\u003cli\u003e12mm back focal distance\u003c\/li\u003e\n\u003cli\u003eFor AG and ODK telescopes\u003c\/li\u003e\n\u003cli\u003eIndividually machined to order in the UK\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\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\u003e85mm Fixed Adaptor Ring -- 2\" thread\u003c\/h2\u003e\n\u003cp\u003eAn 85mm fixed adaptor ring machined to fit 2\" thread with a back focal distance of 12mm.\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\u003eMounting Cameras and Accessories\u003c\/h3\u003e\n\u003cp\u003eFor mounting cameras and accessories to Orion Optics UK's AG and ODK telescopes at the fixed 85mm ring interface.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ctable class=\"DAV-specifications\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eFits\u003c\/td\u003e\n\u003ctd\u003e2\" thread\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBack focal distance\u003c\/td\u003e\n\u003ctd\u003e12mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/li\u003e\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\"\u003e85mm Fixed Adaptor Ring\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\u003cli\u003e\n\u003ca href=\"https:\/\/davidastro.com\/pages\/orion-optics-uk-warranty-policy\" rel=\"noopener\" target=\"_blank\"\u003eOrion Optics UK 1-Year Warranty\u003c\/a\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Orion Optics UK","offers":[{"title":"Default Title","offer_id":52942469726493,"sku":"OOUK-85MM-FIXED-ADAPTOR-RING-2-4","price":353.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Orion-Optics-UK-Logo_3fd03e1b-e95e-44b5-a157-2610d8abbafc.jpg?v=1789607676"},{"product_id":"orion-optics-uk-85mm-fixed-adaptor-ring-to-m92-thread-12mm-bfd","title":"Orion Optics UK 85mm fixed adaptor ring to M92 thread 12mm BFD","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003eFits M92 thread\u003c\/li\u003e\n\u003cli\u003e12mm back focal distance\u003c\/li\u003e\n\u003cli\u003eFor AG and ODK telescopes\u003c\/li\u003e\n\u003cli\u003eIndividually machined to order in the UK\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\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\u003e85mm Fixed Adaptor Ring -- M92 thread\u003c\/h2\u003e\n\u003cp\u003eAn 85mm fixed adaptor ring machined to fit M92 thread with a back focal distance of 12mm.\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\u003eMounting Cameras and Accessories\u003c\/h3\u003e\n\u003cp\u003eFor mounting cameras and accessories to Orion Optics UK's AG and ODK telescopes at the fixed 85mm ring interface.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ctable class=\"DAV-specifications\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eFits\u003c\/td\u003e\n\u003ctd\u003eM92 thread\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBack focal distance\u003c\/td\u003e\n\u003ctd\u003e12mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/li\u003e\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\"\u003e85mm Fixed Adaptor Ring\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\u003cli\u003e\n\u003ca href=\"https:\/\/davidastro.com\/pages\/orion-optics-uk-warranty-policy\" rel=\"noopener\" target=\"_blank\"\u003eOrion Optics UK 1-Year Warranty\u003c\/a\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Orion Optics UK","offers":[{"title":"Default Title","offer_id":52942472511773,"sku":"OOUK-85MM-FIXED-ADAPTOR-RING-M92","price":353.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Orion-Optics-UK-Logo_48c0abb2-7270-4d60-8271-dc34edbd99ee.jpg?v=1789607684"},{"product_id":"orion-optics-uk-85mm-fixed-adaptor-ring-to-fli-3-thread-12mm-bf","title":"Orion Optics UK 85mm fixed adaptor ring to FLI 3\" thread 12mm BF","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003eFits FLI 3\" thread 12mm BF\u003c\/li\u003e\n\u003cli\u003eCustom fit\u003c\/li\u003e\n\u003cli\u003eFor AG and ODK telescopes\u003c\/li\u003e\n\u003cli\u003eIndividually machined to order in the UK\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\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\u003e85mm Fixed Adaptor Ring -- FLI 3\" thread 12mm BF\u003c\/h2\u003e\n\u003cp\u003eAn 85mm fixed adaptor ring machined to fit FLI 3\" thread 12mm BF.\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\u003eMounting Cameras and Accessories\u003c\/h3\u003e\n\u003cp\u003eFor mounting cameras and accessories to Orion Optics UK's AG and ODK telescopes at the fixed 85mm ring interface.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ctable class=\"DAV-specifications\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eFits\u003c\/td\u003e\n\u003ctd\u003eFLI 3\" thread 12mm BF\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/li\u003e\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\"\u003e85mm Fixed Adaptor Ring\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\u003cli\u003e\n\u003ca href=\"https:\/\/davidastro.com\/pages\/orion-optics-uk-warranty-policy\" rel=\"noopener\" target=\"_blank\"\u003eOrion Optics UK 1-Year Warranty\u003c\/a\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Orion Optics UK","offers":[{"title":"Default Title","offer_id":52942476181789,"sku":"OOUK-85MM-FIXED-ADAPTOR-RING-FLI","price":415.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Orion-Optics-UK-Logo_b36b019b-433b-47e7-bf8c-0bf81d7d8cd3.jpg?v=1789607692"},{"product_id":"orion-optics-uk-85mm-fixed-adaptor-ring-optec-2400-dovetail-24-5mm-bfd","title":"Orion Optics UK 85mm fixed adaptor ring OPTEC 2400 dovetail 24.5mm BFD","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003eFits OPTEC 2400 dovetail\u003c\/li\u003e\n\u003cli\u003e24.5mm back focal distance\u003c\/li\u003e\n\u003cli\u003eFor AG and ODK telescopes\u003c\/li\u003e\n\u003cli\u003eIndividually machined to order in the UK\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\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\u003e85mm Fixed Adaptor Ring -- OPTEC 2400 dovetail\u003c\/h2\u003e\n\u003cp\u003eAn 85mm fixed adaptor ring machined to fit OPTEC 2400 dovetail with a back focal distance of 24.5mm.\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\u003eMounting Cameras and Accessories\u003c\/h3\u003e\n\u003cp\u003eFor mounting cameras and accessories to Orion Optics UK's AG and ODK telescopes at the fixed 85mm ring interface.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ctable class=\"DAV-specifications\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eFits\u003c\/td\u003e\n\u003ctd\u003eOPTEC 2400 dovetail\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBack focal distance\u003c\/td\u003e\n\u003ctd\u003e24.5mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/li\u003e\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\"\u003e85mm Fixed Adaptor Ring\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\u003cli\u003e\n\u003ca href=\"https:\/\/davidastro.com\/pages\/orion-optics-uk-warranty-policy\" rel=\"noopener\" target=\"_blank\"\u003eOrion Optics UK 1-Year Warranty\u003c\/a\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Orion Optics UK","offers":[{"title":"Default Title","offer_id":52942479229213,"sku":"OOUK-85MM-FIXED-ADAPTOR-RING-OPTEC","price":353.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Orion-Optics-UK-Logo_d5d795e4-c682-414c-bbe3-b81352eae3c8.jpg?v=1789607700"},{"product_id":"orion-optics-uk-85mm-fixed-adaptor-ring-to-stl-20mm-bfd","title":"Orion Optics UK 85mm fixed adaptor ring to STL 20mm BFD","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003eFits STL\u003c\/li\u003e\n\u003cli\u003e20mm back focal distance\u003c\/li\u003e\n\u003cli\u003eFor AG and ODK telescopes\u003c\/li\u003e\n\u003cli\u003eIndividually machined to order in the UK\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\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\u003e85mm Fixed Adaptor Ring -- STL\u003c\/h2\u003e\n\u003cp\u003eAn 85mm fixed adaptor ring machined to fit STL with a back focal distance of 20mm.\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\u003eMounting Cameras and Accessories\u003c\/h3\u003e\n\u003cp\u003eFor mounting cameras and accessories to Orion Optics UK's AG and ODK telescopes at the fixed 85mm ring interface.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ctable class=\"DAV-specifications\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eFits\u003c\/td\u003e\n\u003ctd\u003eSTL\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBack focal distance\u003c\/td\u003e\n\u003ctd\u003e20mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/li\u003e\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\"\u003e85mm Fixed Adaptor Ring\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\u003cli\u003e\n\u003ca href=\"https:\/\/davidastro.com\/pages\/orion-optics-uk-warranty-policy\" rel=\"noopener\" target=\"_blank\"\u003eOrion Optics UK 1-Year Warranty\u003c\/a\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Orion Optics UK","offers":[{"title":"Default Title","offer_id":52942482112797,"sku":"OOUK-85MM-FIXED-ADAPTOR-RING-STL","price":353.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Orion-Optics-UK-Logo_faed2d57-582c-4a75-9b31-58de1b65a7b0.jpg?v=1789607708"},{"product_id":"orion-optics-uk-85mm-fixed-adaptor-ring-to-t-mount-0-75-12mm-bfd","title":"Orion Optics UK 85mm fixed adaptor ring to T mount 0.75 12mm BFD","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003eFits T mount 0.75\u003c\/li\u003e\n\u003cli\u003e12mm back focal distance\u003c\/li\u003e\n\u003cli\u003eFor AG and ODK telescopes\u003c\/li\u003e\n\u003cli\u003eIndividually machined to order in the UK\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\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\u003e85mm Fixed Adaptor Ring -- T mount 0.75\u003c\/h2\u003e\n\u003cp\u003eAn 85mm fixed adaptor ring machined to fit T mount 0.75 with a back focal distance of 12mm.\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\u003eMounting Cameras and Accessories\u003c\/h3\u003e\n\u003cp\u003eFor mounting cameras and accessories to Orion Optics UK's AG and ODK telescopes at the fixed 85mm ring interface.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ctable class=\"DAV-specifications\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eFits\u003c\/td\u003e\n\u003ctd\u003eT mount 0.75\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBack focal distance\u003c\/td\u003e\n\u003ctd\u003e12mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/li\u003e\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\"\u003e85mm Fixed Adaptor Ring\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\u003cli\u003e\n\u003ca href=\"https:\/\/davidastro.com\/pages\/orion-optics-uk-warranty-policy\" rel=\"noopener\" target=\"_blank\"\u003eOrion Optics UK 1-Year Warranty\u003c\/a\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Orion Optics UK","offers":[{"title":"Default Title","offer_id":52942484898077,"sku":"OOUK-85MM-FIXED-ADAPTOR-RING-T","price":353.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Orion-Optics-UK-Logo_da9d7ff8-fb8a-4c21-8a6d-ba0348558c62.jpg?v=1789607716"},{"product_id":"orion-optics-uk-85mm-fixed-adaptor-ring-to-t-mount-0-75-21mmbfd-to-fit-st-8300","title":"Orion Optics UK 85mm fixed adaptor ring to T mount 0.75 21mmBFD to fit ST-8300","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003eFits T mount 0.75\u003c\/li\u003e\n\u003cli\u003e21mm back focal distance\u003c\/li\u003e\n\u003cli\u003eFor AG and ODK telescopes\u003c\/li\u003e\n\u003cli\u003eIndividually machined to order in the UK\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\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\u003e85mm Fixed Adaptor Ring -- T mount 0.75\u003c\/h2\u003e\n\u003cp\u003eAn 85mm fixed adaptor ring machined to fit T mount 0.75 with a back focal distance of 21mm.\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\u003eMounting Cameras and Accessories\u003c\/h3\u003e\n\u003cp\u003eFor mounting cameras and accessories to Orion Optics UK's AG and ODK telescopes at the fixed 85mm ring interface.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ctable class=\"DAV-specifications\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eFits\u003c\/td\u003e\n\u003ctd\u003eT mount 0.75\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBack focal distance\u003c\/td\u003e\n\u003ctd\u003e21mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/li\u003e\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\"\u003e85mm Fixed Adaptor Ring\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\u003cli\u003e\n\u003ca href=\"https:\/\/davidastro.com\/pages\/orion-optics-uk-warranty-policy\" rel=\"noopener\" target=\"_blank\"\u003eOrion Optics UK 1-Year Warranty\u003c\/a\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Orion Optics UK","offers":[{"title":"Default Title","offer_id":52942487650589,"sku":"OOUK-85MM-FIXED-ADAPTOR-RING-T-2","price":415.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Orion-Optics-UK-Logo_20affc34-120c-410f-94cf-b6d59b3eee87.jpg?v=1789607724"}],"url":"https:\/\/davidastro.com\/fr\/collections\/orion-optics-uk-adapters.oembed?page=2","provider":"David Astro","version":"1.0","type":"link"}