{"product_id":"william-optics-mighty-cat-71-f-3-2-refractor","title":"WILLIAM OPTICS MIGHTY CAT 71 f\/3.2 30th ANNIVERSARY","description":"\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003eThe \u003cstrong\u003eWilliam Optics Mighty Cat 71 30th Anniversary \u003c\/strong\u003eis a groundbreaking new entry in the CAT series of Petzval refractors, with an\u003cstrong\u003e ultra-fast f\/3.2 \u003c\/strong\u003eoptical system which maintains a \u003cstrong\u003e43.2mm image circle\u003c\/strong\u003e. \u003c\/p\u003e\n\u003cp\u003eCelebrating three decades of optical innovation, this \u003cstrong\u003eexclusive 100-set limited run \u003c\/strong\u003efeatures a custom \"Cosmic Visitor\" design adorned with intricate extraterrestrial motifs — a tribute to 30 years of peering into the unknown and chasing the mysteries of the universe.\u003c\/p\u003e\n\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0071\/4935\/5059\/files\/MC-71-30A-pers-4.webp?v=1784686760\" alt=\"\"\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003eThe Mighty Cat 71's \u003cstrong\u003eflat-field 7-element optics\u003c\/strong\u003e, stable internal WIFD focusing system and playful design hints at technology from another world, and is built for demanding deep-sky imaging with modern full-frame and cropped-sensor camera systems.\u003c\/p\u003e\n\u003cp\u003eThe WIFD series has been designed from the ground up to support the\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003elatest large and heavy high-resolution cooled cameras\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eand accessories. The focuser movement is\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eintegrated inside the main OTA\u003c\/strong\u003e, so no external focuser drawtube is needed. This will\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003ereduce tilt caused by focuser sag\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eand mechanical flex and lessen vignetting.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0071\/4935\/5059\/files\/WO-T-MC-71RD-30A_3_1000.jpg?v=1784686794\" alt=\"\"\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003eThe focuser utilizes a\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003ezero image shift rack \u0026amp; pinion\u003c\/strong\u003e mechanism for precise adjustability of critical focus, with an\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eexternal graduated display\u003c\/strong\u003e showing focus position. The lens cell is protected from the elements and is designed to not come out of alignment. The focuser is\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003efully compatible with the ZWO EAF\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003ewithout the need for optional accessories.\u003c\/p\u003e\n\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003cdiv style=\"text-align: center;\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0071\/4935\/5059\/files\/WIFD_800.gif?v=1708411660\" alt=\"\" style=\"float: none;\"\u003e\u003c\/div\u003e\n\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003eThe built-in \u003cstrong\u003eSensor Tilt Xterminator \u003c\/strong\u003e(STX-R) is a heavy duty rear tilt and rotation interface designed to support modern imaging setups, reducing the chance of rear-end sag while retaining convenient sensor-squaring capability.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0071\/4935\/5059\/files\/WO-T-MC-71RD-30A_9_1000.jpg?v=1784686794\" alt=\"\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eLike all CAT series telescopes, the Mighty Cat 71 includes William Optics' \u003cstrong\u003eAnti-Shrink lens cell\u003c\/strong\u003e, which helps maintain stable optical alignment under changing temperature conditions. The CNC-machined and anodized \u003c\/span\u003e\u003cstrong\u003ehandle bar with\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003efinder-style saddle\u003c\/strong\u003e\u003cspan\u003e is perfect for attaching a guide scope or other accessories.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003eM54 x 0.75 and M48 x 0.75 threads are available to connect a wide variety of imaging systems. \u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eNote on the tension screw:\u003cbr\u003e\u003c\/strong\u003e\u003cspan\u003eWhen using the telescope with a focusing motor, please ensure that the tension screw is not over-tightened. Over-tightening the tension screw may cause damage to the focuser.\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003eThink of it like driving a car and pressing the gas pedal while also pressing the brake simultaneously. Just as this action could harm your car's systems, over-tightening the tension screw could compromise the functionality of your telescope's focuser.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eFeatures\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eFull-frame \/ APS-C compatible\u003c\/li\u003e\n\u003cli\u003eApochromatic Super ED lenses\u003c\/li\u003e\n\u003cli\u003eAnti-reflection multicoating\u003c\/li\u003e\n\u003cli\u003eBrand new patented integrated focuser design\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eSuper bright Bahtinov mask\u003c\/li\u003e\n\u003cli\u003eDual Vixen \/ Arca-Swiss mounting plate\u003c\/li\u003e\n\u003cli\u003eField rotator with markings for easy framing\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eModular mounting options\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cdiv style=\"text-align: center;\"\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003cdiv style=\"text-align: center;\"\u003e\u003c\/div\u003e\n\u003cdiv style=\"text-align: center;\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0071\/4935\/5059\/files\/Mighty-Cat-71-30A-spots_1000.png?v=1784686842\" alt=\"\"\u003e\u003c\/div\u003e\n\u003cdiv style=\"text-align: center;\"\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003cdiv style=\"text-align: center;\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0071\/4935\/5059\/files\/Mighty-Cat-71-30A-LA_1000.png?v=1784686842\" alt=\"\"\u003e\u003c\/div\u003e\n\u003cdiv style=\"text-align: center;\"\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003ch5\u003eSpecifications\u003c\/h5\u003e\n\u003cp style=\"font-weight: 400;\"\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003ctable class=\"specificationTable\" style=\"font-weight: 400;\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eOptical design\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\n\u003cp\u003e\u003cspan\u003eApochromatic Petzval with 3 x Super ED elements\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp\u003e\u003cstrong\u003eObjective diameter\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\n\u003cp\u003e71 mm\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eFocal \u003c\/span\u003e\u003c\/strong\u003e\u003cstrong\u003elength\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\n\u003cp\u003e230 mm\u003cbr\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp\u003e\u003cstrong\u003eFocal ratio\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\n\u003cp\u003ef\/3.2\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eImage circle\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\n\u003cp\u003e43.2 mm\u003cbr\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp\u003e\u003cstrong\u003eMaterial\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\n\u003cp\u003eAnodized aluminium alloy\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eMount attachment\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\n\u003cp\u003e 210 mm Dual Vixen-style \/ Arca-Swiss dovetail bar\u003cbr\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp\u003e\u003cstrong\u003eFocuser\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\n\u003cp\u003e\u003cspan\u003eIndexed integrated WIFD focuser\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp\u003e\u003cstrong\u003eCamera connection\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\n\u003cp\u003eM54 x 0.75, M48 x 0.75, optional T-Mounts\u003cbr\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp\u003e\u003cstrong\u003eFocuser travel length\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\n\u003cp\u003e0 - 35 mm\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp\u003e\u003cstrong\u003eBack focus\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\n\u003cp\u003e~55 ± 3 mm recommended\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp\u003e\u003cstrong\u003eTube weight\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\n\u003cp\u003e3.38 kg (4.1 kg with accessories)\u003cbr\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp\u003e\u003cspan\u003e\u003cstrong\u003eTube \u003c\/strong\u003e\u003c\/span\u003e\u003cstrong\u003elength\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\n\u003cp\u003e\u003cspan\u003e315 mm\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp\u003e\u003cstrong\u003eDew shield diameter\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\n\u003cp\u003eTBD\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp\u003e\u003cstrong\u003eSKU\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\n\u003cp\u003eWO-T-MC-71RD-30A\u003cbr\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003cdiv style=\"text-align: center;\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0071\/4935\/5059\/files\/Mighty-Cat-71-30A-schematics_1000.jpg?v=1784686843\" alt=\"\"\u003e\u003c\/div\u003e\n\u003cdiv style=\"text-align: center;\"\u003e\u003c\/div\u003e\n\u003ch5\u003eIncluded items\u003c\/h5\u003e\n\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0071\/4935\/5059\/files\/WO-T-MC-71RD-30A_items_1000.jpg?v=1784687051\" alt=\"\"\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eMighty Cat 71 OTA\u003c\/li\u003e\n\u003cli\u003ePatented Bahtinov mask\u003c\/li\u003e\n\u003cli\u003eM54 \u0026amp; M48 adapters with wrench\u003c\/li\u003e\n\u003cli\u003e210mm dual dovetail\u003c\/li\u003e\n\u003cli\u003eFinder-style handle bar saddle\u003c\/li\u003e\n\u003cli\u003eAllen key set\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eSoft carry case\u003c\/li\u003e\n\u003cli\u003eCommemorative certificate\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cdiv style=\"text-align: center;\"\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003ch5\u003eDownloads\u003c\/h5\u003e\n\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003ctable style=\"width: 55.9146%; margin-left: auto; margin-right: auto;\" class=\"MsoNormalTable\" cellpadding=\"0\" border=\"0\"\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 alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0071\/4935\/5059\/files\/009-telescope-small.png?v=1580188157\" width=\"27\" height=\"27\"\u003e \u003ca rel=\"noopener\" href=\"https:\/\/support.williamoptics.com\/products\/mighty-cat-71\" target=\"_blank\"\u003e\u003cspan style=\"text-decoration: underline;\"\u003eInstruction manual\u003c\/span\u003e\u003c\/a\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e","brand":"Testar Australia","offers":[{"title":"Default Title","offer_id":48704908296417,"sku":"WO-T-MC-71RD-30A","price":4289.0,"currency_code":"AUD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0071\/4935\/5059\/files\/WO-T-MC-71RD-30A_1_1000.jpg?v=1784686618","url":"https:\/\/www.testar.com.au\/products\/william-optics-mighty-cat-71-f-3-2-refractor","provider":"Testar Australia","version":"1.0","type":"link"}