{"product_id":"zwo-ff131-f-7-5-apo-refractor","title":"ZWO FF131 f\/7.5 APO REFRACTOR","description":"\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eThe \u003cstrong\u003eZWO FF131 \u003c\/strong\u003eis an \u003cstrong\u003eapochromatic quadruplet flat-field astrograph \u003c\/strong\u003ethat offers high performance for an exceptionally low price. The quadruplet design makes it perfect for both visual observation and astrophotography. The objective lens features an element of \u003cstrong\u003eextra-low dispersion glass\u003c\/strong\u003e (ED) that minimizes chromatic aberration.\u003c\/span\u003e\u003cspan\u003e \u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cdiv style=\"text-align: center;\"\u003e\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0071\/4935\/5059\/files\/FF131_specs_1000.jpg?v=1781063974\"\u003e\u003c\/div\u003e\n\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003eThe ZWO FF131 is a versatile instrument and excels not just at imaging, but as a grab \u0026amp; go visual telescope (eyepieces \u0026amp; diagonal sold separately).\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0071\/4935\/5059\/files\/FF131_optics_1000.jpg?v=1781063975\"\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003eUnlike traditional refractors, the quadruplet design does \u003cstrong\u003enot require a separate field flattener\u003c\/strong\u003e and you do not need to calculate precise backfocus. With a large image circle of \u003cstrong\u003e44mm\u003c\/strong\u003e, the ZWO FF131 is a highly capable imaging telescope.\u003cimg\u003e\u003cimg\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0071\/4935\/5059\/files\/FF131_main_1000.jpg?v=1781064019\"\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003eThe OTA itself \u003cstrong\u003eweighs just 7.9kg\u003c\/strong\u003e (9.4kg with tube rings and dovetail bar) and has an \u003cstrong\u003eoverall length of 878mm\u003c\/strong\u003e with the dew shield contracted, making it easy to transport.\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eThe \u003cstrong\u003e3\u003c\/strong\u003e\u003c\/span\u003e\u003cstrong\u003e\" dual-speed rack \u0026amp; pinion focuser\u003c\/strong\u003e\u003cspan\u003e is precise and rigid. It is natively compatible with most motorized focusers on the market including the \u003cstrong\u003eZWO EAF\u003c\/strong\u003e. The focuser includes 2\" and 1.25\" visual adapters as well as M48 and M54 camera adapters. On the rear there is a \u003cstrong\u003e360 degree rotator\u003c\/strong\u003e with fine rotation angle markings for precise framing. A 2\" mounted filter can be attached to the rear M48 camera adapter.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0071\/4935\/5059\/files\/FF131_highlights_1000.jpg?v=1781063975\"\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eUnlike most refractors, the FF131 includes \u003cstrong\u003etwo finderscope bases\u003c\/strong\u003e on either side of the focuser, allowing you to attach both a standard guide scope and control unit such as the \u003cstrong\u003eASIAIR\u003c\/strong\u003e without the need for additional accessories. The \u003cstrong\u003ehandlebar\u003c\/strong\u003e also includes a finder-style slot, allowing for even more possibilities.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0071\/4935\/5059\/files\/FF131_lightpath_1000.jpg?v=1781063975\"\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0071\/4935\/5059\/files\/FF131_spots_1000.jpg?v=1781063975\"\u003e\u003c\/p\u003e\n\u003cdiv style=\"text-align: center;\"\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003ch5\u003eSpecifications\u003c\/h5\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ctable border=\"0\" cellpadding=\"0\" style=\"width: 100%;\" class=\"MsoNormalTable\"\u003e\n\u003ctbody\u003e\n\u003ctr style=\"mso-yfti-irow: 1;\"\u003e\n\u003ctd style=\"background: #f1f1f1; padding: 5.5pt; width: 36.0385%;\"\u003e\u003cb\u003eOptical design\u003c\/b\u003e\u003c\/td\u003e\n\u003ctd style=\"background: #f1f1f1; padding: 5.5pt; width: 55.9615%;\"\u003e\n\u003cp style=\"margin-bottom: .0001pt; line-height: normal;\"\u003e\u003cspan\u003eApochromatic air-spaced quadruplet with ED glass\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 5.5pt; width: 36.0385%;\"\u003e\n\u003cp style=\"margin-bottom: .0001pt; line-height: normal;\"\u003e\u003cspan style=\"color: #000000;\"\u003e\u003cb\u003eObjective diameter\u003c\/b\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd style=\"padding: 5.5pt; width: 55.9615%;\"\u003e\n\u003cp style=\"margin-bottom: .0001pt; line-height: normal;\"\u003e131 mm\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"background: #f1f1f1; padding: 5.5pt; width: 36.0385%;\"\u003e\n\u003cp style=\"margin-bottom: .0001pt; line-height: normal;\"\u003e\u003cspan style=\"color: #000000;\"\u003e\u003cb\u003e\u003cspan\u003eFocal \u003c\/span\u003e\u003c\/b\u003e\u003c\/span\u003e\u003cb\u003elength\u003c\/b\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd style=\"background: #f1f1f1; padding: 5.5pt; width: 55.9615%;\"\u003e\n\u003cp style=\"margin-bottom: .0001pt; line-height: normal;\"\u003e983 mm\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 5.5pt; width: 36.0385%;\"\u003e\n\u003cp style=\"margin-bottom: .0001pt; line-height: normal;\"\u003e\u003cspan style=\"color: #000000;\"\u003e\u003cb\u003eFocal ratio\u003c\/b\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd style=\"padding: 5.5pt; width: 55.9615%;\"\u003e\n\u003cp style=\"margin-bottom: .0001pt; line-height: normal;\"\u003ef\/7.5\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"background: #f1f1f1; padding: 5.5pt; width: 36.0385%;\"\u003e\n\u003cp style=\"margin-bottom: .0001pt; line-height: normal;\"\u003e\u003cspan style=\"color: #000000;\"\u003e\u003cb\u003e\u003cspan\u003eResolving power\u003c\/span\u003e\u003c\/b\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd style=\"background: #f1f1f1; padding: 5.5pt; width: 55.9615%;\"\u003e\n\u003cp style=\"margin-bottom: .0001pt; line-height: normal;\"\u003e0.89 arc second\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 5.5pt; width: 36.0385%;\"\u003e\n\u003cp style=\"margin-bottom: .0001pt; line-height: normal;\"\u003e\u003cspan style=\"color: #000000;\"\u003e\u003cb\u003eStellar limiting magnitude\u003c\/b\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd style=\"padding: 5.5pt; width: 55.9615%;\"\u003e\n\u003cp style=\"margin-bottom: .0001pt; line-height: normal;\"\u003e\u003cspan\u003e13.29\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"background: #f1f1f1; padding: 5.5pt; width: 36.0385%;\"\u003e\n\u003cp style=\"margin-bottom: .0001pt; line-height: normal;\"\u003e\u003cspan style=\"color: #000000;\"\u003e\u003cb\u003e\u003cspan\u003eMax. magnification\u003c\/span\u003e\u003c\/b\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd style=\"background: #f1f1f1; padding: 5.5pt; width: 55.9615%;\"\u003e\n\u003cp style=\"margin-bottom: .0001pt; line-height: normal;\"\u003e\u003cspan\u003e327.5 x\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 5.5pt; width: 36.0385%;\"\u003e\n\u003cp style=\"margin-bottom: .0001pt; line-height: normal;\"\u003e\u003cb\u003eLight gathering power\u003c\/b\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd style=\"padding: 5.5pt; width: 55.9615%;\"\u003e\n\u003cp style=\"margin-bottom: .0001pt; line-height: normal;\"\u003e\u003cspan\u003e350.22 times the human eye\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"background: #f1f1f1; padding: 5.5pt; width: 36.0385%;\"\u003e\n\u003cp style=\"margin-bottom: .0001pt; line-height: normal;\"\u003e\u003cb\u003e\u003cspan\u003eMount attachment\u003c\/span\u003e\u003c\/b\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd style=\"background: #f1f1f1; padding: 5.5pt; width: 55.9615%;\"\u003e\n\u003cp style=\"margin-bottom: .0001pt; line-height: normal;\"\u003e300 mm Losmandy-style dovetail with 1\/4\"-20 \u0026amp; 3\/8\" screw holes\u003cbr\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 5.5pt; width: 36.0385%;\"\u003e\n\u003cp style=\"margin-bottom: .0001pt; line-height: normal;\"\u003e\u003cb\u003e\u003cstrong\u003eFocuser\u003c\/strong\u003e\u003c\/b\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd style=\"padding: 5.5pt; width: 55.9615%;\"\u003e\n\u003cp style=\"margin-bottom: .0001pt; line-height: normal;\"\u003e\u003cspan\u003e3\" rack \u0026amp; pinion dual speed 1:10\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"background: #f1f1f1; padding: 5.5pt; width: 36.0385%;\"\u003e\n\u003cp style=\"margin-bottom: .0001pt; line-height: normal;\"\u003e\u003cstrong\u003eTube weight\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd style=\"background: #f1f1f1; padding: 5.5pt; width: 55.9615%;\"\u003e\n\u003cp style=\"margin-bottom: .0001pt; line-height: normal;\"\u003e\u003cspan\u003e7.9 kg (9.4 kg with dovetail and rings)\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 5.5pt; width: 36.0385%;\"\u003e\n\u003cp style=\"margin-bottom: .0001pt; line-height: normal;\"\u003e\u003cspan style=\"color: #000000;\"\u003e\u003cb\u003eTube \u003c\/b\u003e\u003c\/span\u003e\u003cb\u003elength\u003c\/b\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd style=\"padding: 5.5pt; width: 55.9615%;\"\u003e\n\u003cp style=\"margin-bottom: .0001pt; line-height: normal;\"\u003e\u003cspan\u003e878 mm (1026 mm with dew shield extended and photographic adapters)\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"background: #f1f1f1; padding: 5.5pt; width: 36.0385%;\"\u003e\n\u003cp style=\"margin-bottom: .0001pt; line-height: normal;\"\u003e\u003cb\u003e\u003cspan\u003eTube diameter\u003c\/span\u003e\u003c\/b\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd style=\"background: #f1f1f1; padding: 5.5pt; width: 55.9615%;\"\u003e\n\u003cp style=\"margin-bottom: .0001pt; line-height: normal;\"\u003e125 mm\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 5.5pt; width: 36.0385%;\"\u003e\n\u003cp style=\"margin-bottom: .0001pt; line-height: normal;\"\u003e\u003cb\u003e\u003cspan\u003eDew shield diameter\u003c\/span\u003e\u003c\/b\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd style=\"padding: 5.5pt; width: 55.9615%;\"\u003e\n\u003cp style=\"margin-bottom: .0001pt; line-height: normal;\"\u003e\u003cspan\u003e157 mm\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"background: #f1f1f1; padding: 5.5pt; width: 36.0385%;\"\u003e\n\u003cp style=\"margin-bottom: .0001pt; line-height: normal;\"\u003e\u003cb\u003e\u003cstrong\u003eConnections\u003c\/strong\u003e\u003c\/b\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd style=\"background: #f1f1f1; padding: 5.5pt; width: 55.9615%;\"\u003e\u003cspan\u003e2\", 1.25\", M78 x 1, M54 x 0.75, M48 x 0.75\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 5.5pt; width: 36.0385%;\"\u003e\n\u003cp style=\"margin-bottom: .0001pt; line-height: normal;\"\u003e\u003cb\u003e\u003cspan\u003eFocus point (imaging mode)\u003c\/span\u003e\u003c\/b\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd style=\"padding: 5.5pt; width: 55.9615%;\"\u003e\n\u003cp style=\"margin-bottom: .0001pt; line-height: normal;\"\u003e\u003cspan\u003e73 mm from M48 thread, 91 mm from M54 thread\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"background: #f1f1f1; padding: 5.5pt; width: 36.0385%;\"\u003e\n\u003cp style=\"margin-bottom: .0001pt; line-height: normal;\"\u003e\u003cb\u003e\u003cstrong\u003eFocus point (visual mode)\u003c\/strong\u003e\u003c\/b\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd style=\"background: #f1f1f1; padding: 5.5pt; width: 55.9615%;\"\u003e\u003cspan\u003e131 mm from 1.25\" adapter, 142 mm from 2\" adapter\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 5.5pt; width: 36.0385%;\"\u003e\n\u003cp style=\"margin-bottom: .0001pt; line-height: normal;\"\u003e\u003cb\u003e\u003cspan\u003eSKU\u003c\/span\u003e\u003c\/b\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd style=\"padding: 5.5pt; width: 55.9615%;\"\u003e\n\u003cp style=\"margin-bottom: .0001pt; line-height: normal;\"\u003e\u003cspan\u003eZWO-FF131-APO \u003c\/span\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0071\/4935\/5059\/files\/FF131_schematics_1_1000.jpg?v=1781063975\"\u003e\u003c\/p\u003e\n\u003cdiv style=\"text-align: center;\"\u003e\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0071\/4935\/5059\/files\/FF131_schematics_2_1000.jpg?v=1781063975\"\u003e\u003c\/div\u003e\n\u003cdiv style=\"text-align: center;\"\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003cdiv style=\"text-align: center;\"\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003ch5\u003e Items included\u003c\/h5\u003e\n\u003cp\u003e  \u003c\/p\u003e\n\u003cdiv style=\"text-align: center;\"\u003e\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0071\/4935\/5059\/files\/FF131_items_1000.jpg?v=1781063974\"\u003e\u003c\/div\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eFF131 OTA\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003ePair of tube rings\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003e300mm Losmandy bar\u003c\/li\u003e\n\u003cli\u003e2\" visual back\u003c\/li\u003e\n\u003cli\u003e1.25\" eyepiece adapter\u003c\/li\u003e\n\u003cli\u003eM78 - M54 adapter\u003c\/li\u003e\n\u003cli\u003eM54 - M54 adapter\u003c\/li\u003e\n\u003cli\u003eM54 - M48 adapter\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eManual\u003cbr\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch5\u003eDownloads\u003c\/h5\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ctable border=\"0\" cellpadding=\"0\" class=\"MsoNormalTable\" style=\"width: 55.9146%; margin-left: auto; margin-right: auto;\"\u003e\n\u003ctbody\u003e\n\u003ctr style=\"height: 22px;\"\u003e\n\u003ctd style=\"background: #f1f1f1; padding: 5.5pt; width: 100%; height: 22px;\"\u003e\n\u003cimg height=\"27\" width=\"27\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0071\/4935\/5059\/files\/009-telescope-small.png?v=1580188157\" alt=\"\"\u003e \u003ca rel=\"noopener\" href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0071\/4935\/5059\/files\/FF131_Telescope_User_Manual_-_2026.03.10_-_Electronic_Preview_Version_V1.pdf?v=1781062247\" target=\"_blank\"\u003e\u003cspan style=\"text-decoration: underline;\"\u003eInstruction manual\u003c\/span\u003e\u003c\/a\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0071\/4935\/5059\/files\/131F_Flat-Field_User_s_Manual.pdf?v=1778471496\" rel=\"noopener\" target=\"_blank\"\u003e\u003cspan style=\"text-decoration: underline;\"\u003e\u003c\/span\u003e\u003c\/a\u003e\u003ca rel=\"noopener\" href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0071\/4935\/5059\/files\/111F_Flat-Field_User_s_Manual.pdf?v=1778467737\" target=\"_blank\"\u003e\u003cspan style=\"text-decoration: underline;\"\u003e\u003c\/span\u003e\u003c\/a\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0071\/4935\/5059\/files\/91F_Flat-Field_User_s_Manual.pdf?v=1755155385\" target=\"_blank\"\u003e\u003cspan style=\"text-decoration: underline;\"\u003e\u003c\/span\u003e\u003c\/a\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp style=\"text-align: center;\"\u003e \u003c\/p\u003e","brand":"Testar Australia","offers":[{"title":"Default Title","offer_id":48462563377377,"sku":"ZWO-FF131-APO","price":3349.0,"currency_code":"AUD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0071\/4935\/5059\/files\/FF131-APO_3.jpg?v=1781061546","url":"https:\/\/www.testar.com.au\/products\/zwo-ff131-f-7-5-apo-refractor","provider":"Testar Australia","version":"1.0","type":"link"}