{"product_id":"flat61-1x-flattener-for-zenithstar-61","title":"FLAT61 1x FLATTENER FOR ZENITHSTAR 61","description":"\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003eThe William Optics Flat61 is an apochromatic 1x field flattener for the \u003cstrong\u003eZenithstar 61\u003c\/strong\u003e. The \u003cstrong\u003e43mm image circle\u003c\/strong\u003e makes it a good match for \u003cstrong\u003efull-frame sensors\u003c\/strong\u003e. \u003c\/p\u003e\n\u003cp\u003eThe \u003cspan data-mce-fragment=\"1\"\u003eFlat\u003c\/span\u003e\u003cspan data-mce-fragment=\"1\"\u003e61\u003c\/span\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003efeatures \u003cstrong\u003eadjustable spacing\u003c\/strong\u003e for use with a range of cameras and imaging systems. The \u003cspan data-mce-fragment=\"1\"\u003eFlat\u003c\/span\u003e\u003cspan data-mce-fragment=\"1\"\u003e61\u003c\/span\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003eincludes an \u003cstrong\u003eM48 filter thread\u003c\/strong\u003e which will hold any standard 2\" mounted filter. It also includes a handy camera rotator for precise framing of targets.\u003c\/p\u003e\n\u003cp\u003eCompatible with \u003cstrong\u003eWilliam Optics Z61\u003c\/strong\u003e which has an \u003cstrong\u003eM54 x 0.75\u003c\/strong\u003e thread. On the camera side there is an \u003cstrong\u003eM48 x 0.75\u003c\/strong\u003e male thread, which will accept any wide T-ring (sold separately).\u003c\/p\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cstrong\u003eNote: As this is an adjustable flattener, you must adjust the distance for your specific telescope. See the Instructions tab above.\u003c\/strong\u003e\u003c\/p\u003e\n\u003ch5\u003eSpecifications\u003c\/h5\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ctable class=\"specificationTable\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth style=\"text-align: left;\"\u003eReduction factor\u003c\/th\u003e\n\u003ctd\u003e1.0 x\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth style=\"text-align: left;\"\u003eTelescope connection\u003c\/th\u003e\n\u003ctd\u003eM54 x 0.75\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth style=\"text-align: left;\"\u003eCamera connection\u003c\/th\u003e\n\u003ctd\u003eM48 x 0.75\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth style=\"text-align: left;\"\u003eImage circle\u003c\/th\u003e\n\u003ctd\u003e43 mm\u003cbr\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth style=\"text-align: left;\"\u003eBackfocus distance\u003c\/th\u003e\n\u003ctd\u003e55 mm + 12.7 mm adjustment from rear section of flattener\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth style=\"text-align: left;\"\u003eSKU\u003c\/th\u003e\n\u003ctd\u003eWO-P-FLAT61A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cdiv style=\"text-align: center;\"\u003e\u003cimg style=\"float: none;\" alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0071\/4935\/5059\/files\/P-FLAT-61-and-73-Backfocus-and-Dimension_800.png?v=1625814401\"\u003e\u003c\/div\u003e\n\u003ch5\u003eInstructions\u003c\/h5\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eNote: Once you have unscrewed the rear adapter to the appropriate value in the table below, the remaining backfocus distance to make up will be 55mm from the rear M48 thread.\u003c\/strong\u003e  \u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eDistance adjustment needed for correct backfocus\u003c\/strong\u003e\u003c\/p\u003e\n\u003ctable class=\"specificationTable\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth style=\"text-align: left;\"\u003e\u003cspan\u003eZenithstar 61\u003c\/span\u003e\u003c\/th\u003e\n\u003ctd\u003e\u003cspan\u003e12.9 mm\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth style=\"text-align: left;\"\u003e\u003cspan\u003eGuidestar 61\u003c\/span\u003e\u003c\/th\u003e\n\u003ctd\u003e\u003cspan\u003e12.9 mm\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cdiv style=\"text-align: center;\"\u003e\u003cimg style=\"float: none;\" alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0071\/4935\/5059\/files\/WO_Flat_Step1_800.jpg?v=1679974152\"\u003e\u003c\/div\u003e\n\u003cdiv style=\"text-align: center;\"\u003e\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0071\/4935\/5059\/files\/WO_Flat_Step2_800_3302fb8f-1820-4c7e-b390-86be0d3c3190.jpg?v=1679983936\"\u003e\u003c\/div\u003e\n\u003cdiv style=\"text-align: center;\"\u003e\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0071\/4935\/5059\/files\/WO_Flat_Step3_800.jpg?v=1679974177\"\u003e\u003c\/div\u003e\n\u003cdiv style=\"text-align: center;\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0071\/4935\/5059\/files\/instructions2_800_dcc1d7be-783e-4466-87f7-174f5f28b054.jpg?v=1679976110\" alt=\"\"\u003e\u003c\/div\u003e","brand":"Testar Australia","offers":[{"title":"Default Title","offer_id":40108515983552,"sku":"WO-P-FLAT61A","price":379.0,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0071\/4935\/5059\/products\/img_3270_1000.jpg?v=1625883807","url":"https:\/\/www.testar.com.au\/products\/flat61-1x-flattener-for-zenithstar-61","provider":"Testar Australia","version":"1.0","type":"link"}