{"product_id":"sharpstar-3-0-85x-reducer-and-coma-corrector","title":"Sharpstar 3\" 0.85x Reducer and Coma Corrector","description":"\u003ch1 data-mce-fragment=\"1\"\u003eSharpstar 3\" 0.85x Reducer and Coma Corrector for Newtonian Telescopes for Full Frame Sensors\u003c\/h1\u003e\n\u003cp data-mce-fragment=\"1\"\u003eThis large coma corrector that also serves as an optical reducer, has been designed for commercially available Newtonian telescopes with an aim to improve their performance for imaging.\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003eIts 3\" size offers a 44mm diameter corrected field suitable for imaging with an up to FULL FRAME sized sensor. It is compatible with most Newtonian telescopes that you can buy in a telescope shop with f\/4 to f\/6 focal ratio and between 150mm and 600mm aperture.\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003eIt will reduce the required exposure time by changing an f\/4 system into f\/3.4, f\/5 into f\/4.25 and f\/6 into f\/5.1. It will also improve the image quality of the periferial stars.\u003c\/p\u003e\n\u003ch2 data-mce-fragment=\"1\"\u003eSPECIFICATIONS\u003c\/h2\u003e\n\u003cp data-mce-fragment=\"1\"\u003eModel：150mm-600mm, paraboloid reflector\u003cbr data-mce-fragment=\"1\"\u003eFocal ratio：F4-F6\u003cbr data-mce-fragment=\"1\"\u003eMagnification: 0.85x\u003cbr data-mce-fragment=\"1\"\u003eImage Circle: larger than 44mm, the optimal Image of 44 mm.\u003cbr data-mce-fragment=\"1\"\u003eCamera side connection: female M68, female M54, male M48\u003cbr data-mce-fragment=\"1\"\u003eTelescope side connection: male M82\u003cbr data-mce-fragment=\"1\"\u003eNumber of lenses: TBC\u003cbr data-mce-fragment=\"1\"\u003eOuter diameter: 3\"\u003cbr data-mce-fragment=\"1\"\u003eBack focus: 55mm (from end face of M54 thread, but please note, this might slightly vary depending on the optical system. Sharpstar boss, Michael offered to calculate the precise back focus on request...We would need to know the aperture and focal length of your Newtonian telescope...)\u003cbr data-mce-fragment=\"1\"\u003eOverall Length: 119mm (without the length of the M54 thread)\u003cbr data-mce-fragment=\"1\"\u003eOptical Coatings: Fully multi-coated\u003cbr data-mce-fragment=\"1\"\u003eWeight: 0.87kg\u003c\/p\u003e\n\u003cdiv data-mce-fragment=\"1\"\u003e\u003cspan data-mce-fragment=\"1\"\u003eEXAMPLE OF USE:\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv data-mce-fragment=\"1\"\u003e\u003cspan data-mce-fragment=\"1\"\u003eIn the case of a Sharpstar 20032PNT, the focal plane is 55 mm from the M54X0.75 thread at the end of the focuser (from the end of the coma corrector, to be more precise...), and 52mm from the M48x0.75 thread. This \"standard\" back focal distance provides ample space for any visual or photographic equipment, being it a dSLR or a CCD \/ CMOS camera.\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv data-mce-fragment=\"1\"\u003e \u003c\/div\u003e\n\u003cdiv data-mce-fragment=\"1\"\u003e\u003ca href=\"https:\/\/www.365astronomy.com\/image\/cache\/wp\/ij\/content\/SHS-20032PNT-sharpstar-20032pnt-200mm-super-fast-f-3.2-paraboloid-newtonian-reflector-telescope-a12.webp\" data-mce-fragment=\"1\" data-mce-href=\"https:\/\/www.365astronomy.com\/image\/cache\/wp\/ij\/content\/SHS-20032PNT-sharpstar-20032pnt-200mm-super-fast-f-3.2-paraboloid-newtonian-reflector-telescope-a12.webp\"\u003e\u003cimg alt=\"\" src=\"https:\/\/www.365astronomy.com\/image\/cache\/wp\/ij\/content\/SHS-20032PNT-sharpstar-20032pnt-200mm-super-fast-f-3.2-paraboloid-newtonian-reflector-telescope-a12.webp\" data-mce-fragment=\"1\" data-mce-src=\"https:\/\/www.365astronomy.com\/image\/cache\/wp\/ij\/content\/SHS-20032PNT-sharpstar-20032pnt-200mm-super-fast-f-3.2-paraboloid-newtonian-reflector-telescope-a12.webp\"\u003e\u003c\/a\u003e\u003c\/div\u003e\n\u003cp data-mce-fragment=\"1\"\u003eCLICK ON THE BELOW IMAGES FOR LARGER RESOLUTION!\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003e\u003ca href=\"https:\/\/www.365astronomy.com\/image\/cache\/wp\/ij\/content\/SHS-20032PNT-sharpstar-20032pnt-200mm-super-fast-f-3.2-paraboloid-newtonian-reflector-telescope-red-4.webp\" data-mce-fragment=\"1\" data-mce-href=\"https:\/\/www.365astronomy.com\/image\/cache\/wp\/ij\/content\/SHS-20032PNT-sharpstar-20032pnt-200mm-super-fast-f-3.2-paraboloid-newtonian-reflector-telescope-red-4.webp\"\u003e\u003cimg alt=\"\" src=\"https:\/\/www.365astronomy.com\/image\/cache\/wp\/ij\/content\/SHS-20032PNT-sharpstar-20032pnt-200mm-super-fast-f-3.2-paraboloid-newtonian-reflector-telescope-red-4.webp\" data-mce-fragment=\"1\" data-mce-src=\"https:\/\/www.365astronomy.com\/image\/cache\/wp\/ij\/content\/SHS-20032PNT-sharpstar-20032pnt-200mm-super-fast-f-3.2-paraboloid-newtonian-reflector-telescope-red-4.webp\"\u003e\u003c\/a\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0523\/1650\/4241\/files\/sharpstar-3-085x-reducer-and-coma-corrector-405917.webp?v=1718364982\" alt=\"\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0523\/1650\/4241\/files\/sharpstar-3-085x-reducer-and-coma-corrector-121731.webp?v=1718364982\" alt=\"\"\u003e\u003c\/p\u003e","brand":"Sharpstar","offers":[{"title":"Default Title","offer_id":41280981991488,"sku":"SHS-3-0.85X-COMA-CORR","price":791.2,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0601\/6342\/4320\/files\/sharpstar-3-085x-reducer-and-coma-corrector-371674.webp?v=1782241886","url":"https:\/\/wearvico.com\/products\/sharpstar-3-0-85x-reducer-and-coma-corrector","provider":"wearvico","version":"1.0","type":"link"}