{"title":"5- BORG Correction Lenses","description":null,"products":[{"product_id":"borg-1-08x-field-flattener-7108","title":"7108 - BORG 1.08x Field Flattener","description":"1.08x multi flattener, fully covering full frame sensor. Focal length is adjustable for various refractors including non-BORG telescopes.\r\n\u003cul style=\"color: #000000; font-family: Arial, Geneva; font-size: small;\"\u003e\r\n \t\u003cli\u003eWorks with objectives between 300 - 800mm focal length via adjustable lens barrel\u003c\/li\u003e\r\n \t\u003cli\u003eFully covers 35mm full format sensors\u003c\/li\u003e\r\n \t\u003cli\u003eM57 male on objective side\u003c\/li\u003e\r\n \t\u003cli\u003eM57 female on camera side\u003c\/li\u003e\r\n \t\u003cli\u003eBack focus : 55mm\u003c\/li\u003e\r\n \t\u003cli\u003e40.5mm filter thread in front of a lens barrel (allows to set 48mm or *52mm with a stepping ring.\u003c\/li\u003e\r\n\u003c\/ul\u003e\r\n* 52mm filter : too large for regular 2\" focusers\r\n\u003cp style=\"color: #000000; font-family: Arial, Geneva; font-size: small;\"\u003eSample configurations:\u003c\/p\u003e\r\n\r\n\u003cul style=\"color: #000000; font-family: Arial, Geneva; font-size: small;\"\u003e\r\n \t\u003cli\u003e7108 - \u003ca href=\"https:\/\/www.sciencecenter.net\/hutech\/prices\/borgparts\/html\/7923.htm\"\u003e7923\u003c\/a\u003e - \u003ca href=\"https:\/\/www.sciencecenter.net\/hutech\/prices\/borgparts\/html\/5005.htm\"\u003e5005\u003c\/a\u003e - [Canon DSLR]\u003c\/li\u003e\r\n \t\u003cli\u003e7108 - \u003ca href=\"https:\/\/www.sciencecenter.net\/hutech\/prices\/borgparts\/html\/7923.htm\"\u003e7923\u003c\/a\u003e - [M49.8-STL AD] - [SBIG STL camera]\u003c\/li\u003e\r\n\u003c\/ul\u003e\r\n\u003cp style=\"color: #000000; font-family: Arial, Geneva; font-size: small;\"\u003e\u003ca href=\"https:\/\/www.sciencecenter.net\/hutech\/prices\/borgparts\/html\/7000.htm\"\u003e7000\u003c\/a\u003e may be used in place of \u003ca href=\"https:\/\/www.sciencecenter.net\/hutech\/prices\/borgparts\/html\/7923.htm\"\u003e7923\u003c\/a\u003e but a 5mm adjustment is necessary (lens barrel must be pushed in 5mm)\u003c\/p\u003e\r\n\u003cp style=\"color: #000000; font-family: Arial, Geneva; font-size: small;\"\u003eEach index mark is optimized to cover a 35mm full format sensor. For sensors smaller than APS-C sized sensors, the lens barrel should be extended out around\u003c\/p\u003e\r\n ","brand":"Astro Hutech","offers":[{"title":"Default Title","offer_id":49343854149938,"sku":"B7108","price":399.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0883\/6995\/5122\/files\/7108a.jpg?v=1727242817"},{"product_id":"borg-1-4x-teleconverter-7214","title":"7214 - BORG 1.4x Teleconverter","description":"\u003cspan style=\"color: #000000; font-family: Arial, Geneva; font-size: small;\"\u003eThe 7214 teleconverter works with Borg scopes from the Mini Borg 45ED up to the Borg 101ED, and third-party refractors between 300mm and 640mm focal length. It is specifically designed to minimize internal reflections when photographing bright objects such as the moon, sun, or solar eclipses.\u003c\/span\u003e\r\n\u003cp style=\"color: #000000; font-family: Arial, Geneva; font-size: small;\"\u003eRecommended configuration for use with DSLR cameras:\u003c\/p\u003e\r\n\r\n\u003cblockquote style=\"color: #000000; font-family: Arial, Geneva; font-size: small;\"\u003e\n\u003cstrong\u003e7214\u003c\/strong\u003e - \u003ca href=\"https:\/\/www.sciencecenter.net\/hutech\/prices\/borgparts\/html\/7000.htm\"\u003e7000\u003c\/a\u003e - 500x (camera adapter) - DSLR camera body\u003c\/blockquote\u003e\r\n\u003cblockquote style=\"color: #000000; font-family: Arial, Geneva; font-size: small;\"\u003e\r\n\u003ctable border=\"1\"\u003e\r\n\u003ctbody\u003e\r\n\u003ctr\u003e\r\n\u003ctd\u003e\r\n\u003ctable border=\"0\" cellpadding=\"1\"\u003e\r\n\u003ctbody\u003e\r\n\u003ctr\u003e\r\n\u003ctd align=\"RIGHT\"\u003e\u003cspan style=\"font-family: Arial, Geneva; font-size: small;\"\u003e\u003cstrong\u003eA:\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\r\n\u003ctd\u003e\u003cspan style=\"font-family: Arial, Geneva; font-size: small;\"\u003e \u003c\/span\u003e\u003c\/td\u003e\r\n\u003ctd align=\"LEFT\"\u003e\u003cspan style=\"font-family: Arial, Geneva; font-size: small;\"\u003eM57 P0.75 Male\u003c\/span\u003e\u003c\/td\u003e\r\n\u003c\/tr\u003e\r\n\u003ctr\u003e\r\n\u003ctd align=\"RIGHT\"\u003e\u003cspan style=\"font-family: Arial, Geneva; font-size: small;\"\u003e\u003cstrong\u003eB:\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\r\n\u003ctd\u003e\u003cspan style=\"font-family: Arial, Geneva; font-size: small;\"\u003e \u003c\/span\u003e\u003c\/td\u003e\r\n\u003ctd align=\"LEFT\"\u003e\u003cspan style=\"font-family: Arial, Geneva; font-size: small;\"\u003eM57 P0.75 Female\u003c\/span\u003e\u003c\/td\u003e\r\n\u003c\/tr\u003e\r\n\u003c\/tbody\u003e\r\n\u003c\/table\u003e\r\n\u003c\/td\u003e\r\n\u003c\/tr\u003e\r\n\u003c\/tbody\u003e\r\n\u003c\/table\u003e\r\n\u003cspan style=\"font-family: Arial, Helvetica, sans-serif; font-size: small;\"\u003eNotes:\u003c\/span\u003e\r\n\r\n \r\n\u003cul\u003e\r\n \t\u003cli\u003eDistance from B-side interface flange to image plane is 60mm (fixed distance).\u003c\/li\u003e\r\n \t\u003cli\u003eAdjustment for objective focal length does not require the use of tools. The adjustment position of the assembly is held by friction.\u003c\/li\u003e\r\n\u003c\/ul\u003e\r\n \u003c\/blockquote\u003e","brand":"Astro Hutech","offers":[{"title":"Default Title","offer_id":49343854543154,"sku":"borg-1.4x-teleconverter---#7214","price":335.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0883\/6995\/5122\/files\/7214a.jpg?v=1727242829"},{"product_id":"borg-1-4x-teleconverter-dx-7215","title":"7215 - BORG 1.4x Teleconverter DX","description":"BORG 7215 1.4x teleconverter DX works between 500 and 1000mm focal length. More suitable for full frame cameras and longer focal length telescopes than #7214.\r\n\u003cul\u003e\r\n \t\u003cli\u003e36mm front lens diameter - large enough for full frame sensor\u003c\/li\u003e\r\n \t\u003cli\u003eM57 male : objective lens side\u003c\/li\u003e\r\n \t\u003cli\u003eM57 female : camera side\u003c\/li\u003e\r\n \t\u003cli\u003eBack focus distance : 60mm\u003c\/li\u003e\r\n \t\u003cli\u003e220g\u003c\/li\u003e\r\n \t\u003cli\u003eQuite flat illumination entire full frame sensor\u003c\/li\u003e\r\n \t\u003cli\u003eCarefully designed to minimize the internal reflections - perfect for the total solar eclipse\u003c\/li\u003e\r\n\u003c\/ul\u003e","brand":"Astro Hutech","offers":[{"title":"Default Title","offer_id":49343854772530,"sku":"7215","price":399.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0883\/6995\/5122\/files\/7215a.jpg?v=1727242832"},{"product_id":"borg-0-72x-quadruplet-super-reducer-7872","title":"7872 - BORG 0.72x Quadruplet Super Reducer","description":"\u003cspan style=\"color: #000000; font-family: Arial, Geneva; font-size: small;\"\u003eBorg part 7872 is a 0.72x four-element reducer system, designed specifically for the 90FL and 71FL\/72FL objectives.\u003c\/span\u003e\r\n\u003cul style=\"color: #000000; font-family: Arial, Geneva; font-size: small;\"\u003e\r\n \t\u003cli\u003eBack focus distance: 60mm\u003c\/li\u003e\r\n \t\u003cli\u003eImage coverage: Full frame\u003c\/li\u003e\r\n \t\u003cli\u003eObjective side interface: M57 male\u003c\/li\u003e\r\n \t\u003cli\u003eCamera side interface: M57 female\u003c\/li\u003e\r\n\u003c\/ul\u003e\r\n\u003cspan style=\"color: #000000; font-family: Arial, Geneva; font-size: small;\"\u003eFor additional information, refer to the \u003c\/span\u003e\u003ca style=\"font-family: Arial, Geneva; font-size: small;\" href=\"https:\/\/www.sciencecenter.net\/hutech\/borg\/techdocs\/7872.pdf\"\u003ereducer system diagram\u003c\/a\u003e\u003cspan style=\"color: #000000; font-family: Arial, Geneva; font-size: small;\"\u003e [PDF].\u003c\/span\u003e","brand":"Astro Hutech","offers":[{"title":"Default Title","offer_id":49343863423282,"sku":"B7872","price":575.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0883\/6995\/5122\/files\/DSC09985ss4-1.jpg?v=1727243076"},{"product_id":"borg-0-8x-quadruplet-super-reducer-for-borg-55fl-7880","title":"7880 - BORG 0.8x Quadruplet Super Reducer for BORG 55FL","description":"\u003ctable style=\"font-family: 'Times New Roman';\" width=\"600\" cellpadding=\"10\"\u003e\r\n\u003ctbody\u003e\r\n\u003ctr\u003e\r\n\u003ctd\u003e\n\u003cspan style=\"font-family: Arial, Geneva; font-size: small;\"\u003e\u003cspan style=\"font-family: Arial, Geneva; font-size: small;\"\u003eBorg part 7880 is a 0.8x four-element reducer system for BORG 55FL objective lens. \u003c\/span\u003e\u003c\/span\u003e\r\n\u003cul\u003e\r\n \t\u003cli\u003eTakes down to F3.6\u003c\/li\u003e\r\n \t\u003cli\u003eBack focus distance: 60mm\u003c\/li\u003e\r\n \t\u003cli\u003eObjective side interface: M57 P0.75 male\u003c\/li\u003e\r\n \t\u003cli\u003eCamera side interface: M57 P0.75 female\u003c\/li\u003e\r\n \t\u003cli\u003eCovers full frame sensor\u003c\/li\u003e\r\n \t\u003cli\u003e75% illumination at the corner of the full frame sensor\u003c\/li\u003e\r\n\u003c\/ul\u003e\r\n\u003cspan style=\"font-family: Arial, Geneva; font-size: small;\"\u003eFor additional configuration information, refer to the \u003ca href=\"https:\/\/www.sciencecenter.net\/hutech\/borg\/techdocs\/7880.pdf\"\u003ereducer system diagram\u003c\/a\u003e [PDF].\u003c\/span\u003e\r\n\r\n \u003c\/td\u003e\r\n\u003c\/tr\u003e\r\n\u003c\/tbody\u003e\r\n\u003c\/table\u003e","brand":"Astro Hutech","offers":[{"title":"Default Title","offer_id":49343865225522,"sku":"borg-0.8x-quadruplet-super-reducer-for-borg-55fl---#-7880","price":575.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0883\/6995\/5122\/files\/7880a.jpg?v=1727243091"},{"product_id":"7885-borg-0-85x-reducer-for-mini-borg-series","title":"7885 - BORG 0.85x Reducer for Mini Borg Series","description":"\u003cul\u003e\r\n \t\u003cli\u003e0.85x Reducer\u003c\/li\u003e\r\n \t\u003cli\u003eWorks with 250mm to 400mm focal length\u003c\/li\u003e\r\n \t\u003cli\u003eCovers up to APS-H\u003c\/li\u003e\r\n \t\u003cli\u003eM57P0.75 Male \u0026amp; M49.8\/P0.75 Male\u003c\/li\u003e\r\n \t\u003cli\u003e52mm filter at the objective side\u003c\/li\u003e\r\n\u003c\/ul\u003e","brand":"Astro Hutech","offers":[{"title":"Default Title","offer_id":49343866208562,"sku":"7885","price":285.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0883\/6995\/5122\/files\/7885.jpg?v=1727243094"}],"url":"https:\/\/a7ead1-f1.myshopify.com\/collections\/5-borg-correction-lenses.oembed","provider":"Astro Hutech","version":"1.0","type":"link"}