{"product_id":"william-optics-redcat-61-wifd-f-4-9-petzval-refractor-t-c-61rd","title":"William Optics Redcat 61 WIFD F\/4.9 Petzval Refractor (T-C-61RD)","description":"\u003ch1\u003eWilliam Optics Redcat 61 WIFD F\/4.9 Petzval Refractor\u003c\/h1\u003e\n\u003cp\u003e\u003cspan\u003eIntroducing the Redcat 61 Astrograph f\/4.9, a masterpiece of precision engineering. With its advanced optics and f\/4.9 focal ratio, this telescope will allow you to capture stunning celestial images. Experience the ultimate in astronomical photography with Redcat.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch2\u003e\u003cspan\u003eSpot Diagrams\u003c\/span\u003e\u003c\/h2\u003e\n\u003cdiv style=\"text-align: left;\"\u003e\u003cimg style=\"margin-bottom: 16px; float: none;\" alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/Redcat-61-Diagram-01_f4d8ec24-47ff-4dba-a598-c4950bb2e96e_1024x1024.webp?v=1757710978\"\u003e\u003c\/div\u003e\n\u003ch2\u003eLongitudinal Aberration\u003c\/h2\u003e\n\u003cdiv style=\"text-align: left;\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/Redcat-61-Diagram-02_90c818f3-c1be-4fa1-bade-0576dce388f2_1024x1024.webp?v=1757711023\" alt=\"\" style=\"float: none;\"\u003e\u003c\/div\u003e\n\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003e\u003cstrong\u003eSpecification\u003c\/strong\u003e\u003c\/th\u003e\n\u003cth\u003e\u003cstrong\u003eDetails\u003c\/strong\u003e\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eLens Type\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e4-Element Petzval\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eFocal Length\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e300 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eDiameter\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e61 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eFocal Ratio\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003ef\/4.9\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eImage Circle\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e46 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eFocuser\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eWIFD R\u0026amp;P Focuser (Compatible with EAF)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eFocus Travel\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e0–42 mm (Ruler to 50 mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eAdapter Included\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eTilt Adjuster · M60 → M54 Rotator · M54 → M48 Adapter\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eOptional Flattener\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eNo Flattener Required\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eT-Mount Support\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eCanon EF, RF · Nikon F, Z · Sony E · Pentax K · MFT (M4\/3) · FUJI X\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eCamera Format\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eFull Frame · APS-C · M4\/3\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eTube Length\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e365 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eOTA Weight\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e2.47 kg \/ 5.45 lbs\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eTotal Weight\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e3.38 kg \/ 7.47 lbs\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch3\u003e\u003cbr\u003e\u003c\/h3\u003e\n\u003ch3\u003eIn the Box\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eWilliam Optics RedCat 61 APO f\/4.9 WIFD\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eSoft Carrying Case\u003c\/li\u003e\n\u003cli\u003ePatented Bahtinov Mask\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eDovetail\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eMounting Rings with Handle Bar\u003c\/li\u003e\n\u003cli\u003eAllen Key Set\u003c\/li\u003e\n\u003cli\u003eM48 \/ M54 Adapter\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eManuals \u0026amp; Warranty\u003c\/h3\u003e\n\u003cp\u003e\u003ca href=\"https:\/\/istronomyplus.com\/pages\/william-optics-warranty\" target=\"_blank\"\u003e\u003cspan\u003eWilliam Optics 2-Year Warranty\u003c\/span\u003e \u003c\/a\u003e\u003c\/p\u003e\n\u003cp\u003e\u003ca title=\"William Optics RedCat 61\" href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/MANUAL-T-C-61RD.pdf?v=1693595318\" target=\"_blank\"\u003e\u003cspan\u003eWilliam Optics RedCat 61 Manual\u003c\/span\u003e\u003c\/a\u003e\u003c\/p\u003e\n\u003cp\u003e\u003ca href=\"https:\/\/support.williamoptics.com\/products\/cat-61-wifd\" rel=\"noopener\" target=\"_blank\"\u003e\u003cspan\u003eWilliam Optics Redcat 61 Additionnal Information\u003c\/span\u003e\u003c\/a\u003e\u003c\/p\u003e\n\u003cp\u003e\u003ca href=\"https:\/\/istronomyplus.com\/pages\/william-optics-f-a-q\" target=\"_blank\"\u003e\u003cspan\u003eWilliam Optics F.A.Q\u003c\/span\u003e\u003c\/a\u003e\u003c\/p\u003e","brand":"William Optics","offers":[{"title":"Default Title","offer_id":44051163381989,"sku":"WO-T-C-61RD","price":1929.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/Redcat-61-perspective-1.webp?v=1757711477","url":"https:\/\/istronomyplus.com\/products\/william-optics-redcat-61-wifd-f-4-9-petzval-refractor-t-c-61rd","provider":"Astronomy Plus – Telescopes \u0026 Astrophotography Canada","version":"1.0","type":"link"}