{"product_id":"william-optics-redcat-51-v3-wifd-apo-250mm-f-4-9-l-rc51rdiii","title":"William Optics Red Cat51 V3 - 51mm f\/4.9 Refractor with WIFD - L-RC51RDIII","description":"\u003cp\u003eDesigned to be the best, affordable, small, lightweight and fast Apochromatic refactor for astrophotography. The unique optical design includes the highest quality glass for the best possible color correction and flat large image circle. The result is a 51 mm objective lens, in a sleek Petzval design, for a full-frame image.\u003c\/p\u003e\n\u003cp\u003eAs seen on the RedCat 61 series, the patented William Optics Internal Focus Design (WIFD) makes its debut on the RedCat 51 series! The addition of the WIFD system brings something that RedCat 51 fans have all been waiting for: out-of-the box electronic focuser compatibility. This innovation from William Optics provides the ultimate Apochromatic refractor for astrophotography!\u003c\/p\u003e\n\u003cp\u003eThis internal focusing design does not shift the length of the OTA in any way, as the optics themselves move within the telescope as opposed to the camera moving. This prevents vignetting seen with traditional rear mounted focusers, and allows for a better redistribution of weight for improved balance of your optical assembly during your night of imaging. This WIFD apparatus offers the ability to automate your astrophotography set up with an electronic automatic focuser as well! When pairing this innovative technology with the high quality Petzval design of the RedCat series, William Optics delivers a telescope with outstanding astrophotography performance.\u003c\/p\u003e\n\u003cdiv class=\"table-wrapper\"\u003e\n\u003ctable\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocal Length:\u003c\/td\u003e\n\u003ctd\u003e250mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDiameter:\u003c\/td\u003e\n\u003ctd\u003e51mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAperture:\u003c\/td\u003e\n\u003ctd\u003ef\/4.9\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocuser:\u003c\/td\u003e\n\u003ctd\u003eWIFD (WilliamOptics Internal Focus Design)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eImage Circle:\u003c\/td\u003e\n\u003ctd\u003e48mm Full Frame\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTube Length:\u003c\/td\u003e\n\u003ctd\u003e298mm (Fully Extended)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTube Weight:\u003c\/td\u003e\n\u003ctd\u003e1.77 kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003eIncludes:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eWilliam Optics 51mm Gen 3 RedCat\u003c\/li\u003e\n\u003cli\u003eDust Cover with Bahtinov Mask\u003c\/li\u003e\n\u003cli\u003e210 mm Vixen Dovetail\u003c\/li\u003e\n\u003cli\u003eMounting Ring\u003c\/li\u003e\n\u003cli\u003eSoft Carrying Case\u003c\/li\u003e\n\u003cli\u003eDew Shield\u003c\/li\u003e\n\u003cli\u003eTilt Adjuster\u003c\/li\u003e\n\u003cli\u003eCamera Angle Rotation Device\u003c\/li\u003e\n\u003cli\u003eSaddle Handle Bar\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cdiv class=\"value\"\u003e\n\u003cdiv class=\"data item content\" id=\"additional\" data-role=\"content\" aria-labelledby=\"tab-label-additional\" role=\"tabpanel\" aria-hidden=\"true\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0224\/6770\/6960\/files\/Redcat-51-Diagram-01.webp?v=1712237337\" alt=\"\"\u003e\u003c\/div\u003e\n\u003cdiv class=\"data item content\" data-role=\"content\" aria-labelledby=\"tab-label-additional\" role=\"tabpanel\" aria-hidden=\"true\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0224\/6770\/6960\/files\/Redcat-51-Diagram-02.webp?v=1712237337\" alt=\"\"\u003e\u003c\/div\u003e\n\u003cdiv class=\"data item content\" data-role=\"content\" aria-labelledby=\"tab-label-additional\" role=\"tabpanel\" aria-hidden=\"true\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0224\/6770\/6960\/files\/Redcat-51-Diagram-03.webp?v=1712237337\" alt=\"\"\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c!----\u003e","brand":"William Optics","offers":[{"title":"Default Title","offer_id":41211587526769,"sku":"WIL-L-RC51RDIII","price":788.95,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0851\/2766\/files\/william-optics-telescope-william-optics-redcat-51-v3-wifd-apo-250mm-f-4-9-l-rc51iii-40883614089435.webp?v=1776459021","url":"https:\/\/khanscope.com\/fr-fr\/products\/william-optics-redcat-51-v3-wifd-apo-250mm-f-4-9-l-rc51rdiii","provider":"Khan Scope Centre","version":"1.0","type":"link"}