{"product_id":"tanotis-bhpv-wilrc51sgiii","title":"William Optics Cat 51 WIFD 51mm f\/4.9 Apochromatic Refractor Telescope (OTA Only, Space Gray)","description":"\u003cdiv\u003e\u003cdiv\u003e\u003cp\u003eDesigned for stargazing and astrophotography, the \u003cb\u003eCat 51 WIFD 51mm f\/4.9 Apochromatic Refractor Telescope\u003c\/b\u003e from \u003cstrong\u003eWilliam Optics\u003c\/strong\u003e uses an unorthodox design for supporting heavy cameras and delivers a wide field, a fast focal ratio, and a Petzval lens for beautiful images. The WIFD (William Optic Internal Focus Design) places the 10:1 rack-and-pinion focuser in the center of the optical tube, eliminating the tilt and vignetting that can occur from heavy cameras on traditional rear-mounted focusers. A four-element Petzval-style lens yields a sharp image with no need for a flattener and the dust cover has a built-in Bahtinov mask for tack-sharp star images. This optical tube assembly requires a mount and a tripod for use.\u003c\/p\u003e\u003c\/div\u003e\u003c\/div\u003e\u003ctable\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eAperture\u003c\/td\u003e\n\u003ctd\u003e\u003cdiv\u003e\u003cspan\u003e2\" \/ 51 mm\u003c\/span\u003e\u003c\/div\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocal Length\u003c\/td\u003e\n\u003ctd\u003e\u003cdiv\u003e\u003cspan\u003e250 mm\u003c\/span\u003e\u003c\/div\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocal Ratio\u003c\/td\u003e\n\u003ctd\u003e\u003cdiv\u003e\u003cspan\u003ef\/4.9\u003c\/span\u003e\u003c\/div\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eEyepiece\u003c\/td\u003e\n\u003ctd\u003e\u003cdiv\u003e\u003cspan\u003eSold Separately\u003c\/span\u003e\u003c\/div\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\u003ctable\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eOptical Design\u003c\/td\u003e\n\u003ctd\u003e\u003cdiv\u003e\u003cspan\u003eApochromatic Doublet Refractor\u003c\/span\u003e\u003c\/div\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAperture\u003c\/td\u003e\n\u003ctd\u003e\u003cdiv\u003e\u003cspan\u003e2\" \/ 51 mm\u003c\/span\u003e\u003c\/div\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocal Length\u003c\/td\u003e\n\u003ctd\u003e\u003cdiv\u003e\u003cspan\u003e250 mm\u003c\/span\u003e\u003c\/div\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocal Ratio\u003c\/td\u003e\n\u003ctd\u003e\u003cdiv\u003e\u003cspan\u003ef\/4.9\u003c\/span\u003e\u003c\/div\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocuser\u003c\/td\u003e\n\u003ctd\u003e\u003cdiv\u003e\u003cspan\u003eDual-Speed Rack-and-Pinion\u003c\/span\u003e\u003c\/div\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eEyepiece\u003c\/td\u003e\n\u003ctd\u003e\u003cdiv\u003e\u003cspan\u003eSold Separately\u003c\/span\u003e\u003c\/div\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFinderscope\u003c\/td\u003e\n\u003ctd\u003e\u003cdiv\u003e\u003cspan\u003eNo\u003c\/span\u003e\u003c\/div\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMounting\u003c\/td\u003e\n\u003ctd\u003e\u003cdiv\u003e\u003cspan\u003eVixen Style\u003c\/span\u003e\u003c\/div\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOptical Tube Dimensions\u003c\/td\u003e\n\u003ctd\u003e\u003cdiv\u003e\u003cspan\u003e13.6\" \/ 346 mm\u003c\/span\u003e\u003c\/div\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\u003ctable\u003e\u003ctbody\u003e\u003ctr\u003e\n\u003ctd\u003eWeight\u003c\/td\u003e\n\u003ctd\u003e\u003cdiv\u003e\u003cspan\u003e5.25 lb \/ 2.38 kg\u003c\/span\u003e\u003c\/div\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\u003c\/tbody\u003e\u003c\/table\u003e\u003ctable\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003ePackage Weight\u003c\/td\u003e\n\u003ctd\u003e\u003cdiv\u003e\u003cspan\u003e8.995 lb\u003c\/span\u003e\u003c\/div\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBox Dimensions (LxWxH)\u003c\/td\u003e\n\u003ctd\u003e\u003cdiv\u003e\u003cspan\u003e15.6 x 10.9 x 9.4\"\u003c\/span\u003e\u003c\/div\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\u003cp\u003eAll product and company names are trademarks™ or registered® trademarks of their respective holders. Use of them does not imply any affiliation with or endorsement by them. Image is for illustrative purposes only. Please refer to product description.\u003c\/p\u003e","brand":"William Optics-10","offers":[{"title":"Default Title","offer_id":46455260053589,"sku":"WILRC51SGIII:WILRC51SGIII:bhpv","price":99999999.0,"currency_code":"INR","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1034\/1611\/files\/1781788640_1980986.jpg?v=1792653314","url":"https:\/\/www.tanotis.com\/products\/tanotis-bhpv-wilrc51sgiii","provider":"Tanotis","version":"1.0","type":"link"}