{"title":"Featured Sharpstar Equipment","description":null,"products":[{"product_id":"sharpstar-76edph","title":"Sharpstar 76EDPH","description":"\u003ch3\u003eSharpstar 76EDPH: Advanced Optics for Astrophotography\u003c\/h3\u003e\n\u003cp\u003eThe Sharpstar 76EDPH is the second addition to the Sharpstar EDPH family. Known for its aesthetic appeal and compact design, it features a triplet air-spaced lens structure with ED (extra-low dispersion) glass, ensuring outstanding performance for both visual observation and astrophotography. This design effectively eliminates chromatic aberration, delivering detailed and high-contrast images.\u003c\/p\u003e\n\u003cp\u003eWith a 76mm aperture and a focal length of 418mm, the Sharpstar 76EDPH achieves a fast focal ratio of f\/5.5. Its compactness, with a tube length of only 332.9mm when the dew shield is contracted, makes it an ideal companion for travel. This telescope easily fits into travel bags and can be taken on planes, offering convenience for outdoor sky observation.\u003c\/p\u003e\n\u003cp\u003eThe Sharpstar 76EDPH’s precise optical and mechanical design ensures high performance. It also comes with a dedicated 2.5\" f\/4.5 full-frame reducer, elevating it among high-end, fast-focal-ratio astrographs.\u003c\/p\u003e","brand":"Sharpstar","offers":[{"title":"Default Title","offer_id":42269764255921,"sku":"76EDPH","price":865.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0523\/1650\/4241\/files\/sharpstar-76edph-892755.jpg?v=1718480277"},{"product_id":"sharpstar-94edph","title":"SharpStar 94EDPH f\/5.5 Triplet ED APO Telescope","description":"\u003ch1\u003eExperience Unparalleled Precision with the SharpStar 94EDPH f\/5.5 Triplet ED APO Telescope\u003c\/h1\u003e\n\u003cdiv id=\"saf-detail-0\" class=\"cbox-57 p_loopItem\"\u003e\n\u003cdiv class=\"e_richText-73 s_title clearfix\"\u003e\n\u003cdiv id=\"ce_detail-277242\" data-layout=\"flow\" class=\"ce_detail\"\u003e\n\u003cdiv id=\"ie_grid-1672716903228\" class=\"ie_grid\"\u003e\n\u003cdiv class=\"ie_grid signal\"\u003e\n\u003cdiv class=\"e_box e_box-000 p_gridbox\"\u003e\n\u003cdiv id=\"content_ie-1672716903228-0\" class=\"e_box e_box-000 d_gridCell_0 p_gridCell\"\u003e\n\u003cdiv id=\"ie_grid-1672716903233\" class=\"ie_grid\"\u003e\n\u003cdiv class=\"ie_grid signal\"\u003e\n\u003cdiv class=\"e_box e_box-000 p_gridbox\"\u003e\n\u003cdiv id=\"content_ie-1672716903233-0\" class=\"e_box e_box-000 d_gridCell_0 p_gridCell\"\u003e\n\u003cdiv id=\"ie_fimg-1672716903238\" class=\"ie_fimg\"\u003e\n\u003cdiv\u003e\u003cimg alt=\"长友气体\" width=\"100%\" src=\"https:\/\/omo-oss-image.thefastimg.com\/common\/design\/detail\/78db62cb-d591-482f-9ae6-4e213ea15c49.jpg\" height=\"100%\"\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv id=\"ie_line-1672716903483\" class=\"ie_line\"\u003e\n\u003cspan\u003e \u003c\/span\u003e\n\u003cdiv\u003e \u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv id=\"ie_text-1672716903488\" class=\"reset_style\"\u003e\n\u003cp\u003e\u003cspan\u003eThe brand new 94EDPH is the third type of this Sharpstar EDPG family. Its aperture size is 94mm and the focal length is 517mm, thus the focal ratio is f\/5.5. 94EDPH is designed with triplet air-spaced APO lens structure, including two pieces of ED(extra-low dispersion) glass, which empowers the astragraph to achieve more effective aberration amendment thus to produce more accurate images. With its innate compactness, fashionable appearance, and above all, superb quality, Sharpstar 94EDPH can be applied to both high-end sky-observation and sophisticated astrophotograph.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e \u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eThe reducer can reduce the original focal ratio to f\/4.4, supporting full-frame imaging, opening up for our customers more possibilities in exploring the universe.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e \u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eSharpstar 94EDPH must be an ideal choice, worthy of consideration, if you are looking for a large-aperture, fast-focal-ratio, quality and lightweight APO refractive telescope.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv id=\"ie_fimg-1672716903493\" class=\"ie_fimg\"\u003e\n\u003cdiv\u003e\u003cimg alt=\"长友气体\" width=\"100%\" src=\"https:\/\/omo-oss-image.thefastimg.com\/common\/design\/detail\/c21e814e-4158-4a4b-bddb-c5f0b1bf7d25.jpg\" height=\"100%\"\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv id=\"ie_fimg-1672716903498\" class=\"ie_fimg\"\u003e\n\u003cdiv\u003e\u003cimg alt=\"长友气体\" width=\"100%\" src=\"https:\/\/omo-oss-image.thefastimg.com\/common\/design\/detail\/ed095bf5-c15f-4433-9391-c5cbfcb3f671.jpg\" height=\"100%\"\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv id=\"saf-detail-1\" class=\"cbox-57 p_loopItem\"\u003e\n\u003ch3 class=\"e_h3-72 s_summary\"\u003eSpecifications\u003c\/h3\u003e\n\u003cdiv class=\"e_richText-73 s_title clearfix\"\u003e\n\u003ctable width=\"84.20%\" cellspacing=\"0\" align=\"center\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd colspan=\"3\"\u003e\n\u003cp\u003e\u003cstrong\u003e94EDPH Parameters\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp\u003e\u003cstrong\u003eAperture size\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd colspan=\"2\"\u003e\n\u003cp\u003e\u003cstrong\u003e94mm\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp\u003e\u003cstrong\u003eFocal length\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd colspan=\"2\"\u003e\n\u003cp\u003e\u003cstrong\u003e517mm\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp\u003e\u003cstrong\u003eFocal ratio\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd colspan=\"2\"\u003e\n\u003cp\u003e\u003cstrong\u003ef\/5.5\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp\u003e\u003cstrong\u003eObjective lens\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd colspan=\"2\"\u003e\n\u003cp\u003e\u003cstrong\u003eTriplet air-spaced APO (two is made of ultra-low dispersion ED glass)\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp\u003e\u003cstrong\u003eLimiting magnitude\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd colspan=\"2\"\u003e\n\u003cp\u003e\u003cstrong\u003e11.62\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp\u003e\u003cstrong\u003eResolution\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\n\u003cp\u003e\u003cstrong\u003e1.28 arc-seconds\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp\u003e\u003cstrong\u003eTube length overall\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd colspan=\"2\"\u003e\n\u003cp\u003e\u003cstrong\u003e468mm\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp\u003e\u003cstrong\u003eMain tube diameter\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd colspan=\"2\"\u003e\n\u003cp\u003e\u003cstrong\u003e118mm\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp\u003e\u003cstrong\u003eWeight\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd colspan=\"2\"\u003e\n\u003cp\u003e\u003cstrong\u003e3.3KG\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp\u003e\u003cstrong\u003eAccessories\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd colspan=\"2\"\u003e\n\u003cp\u003e\u003cstrong\u003ea pair of tube rings, a dovetail plate, a handle\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ctable width=\"84.20%\" cellspacing=\"0\" align=\"center\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd colspan=\"3\"\u003e\n\u003cp\u003e\u003cstrong\u003eSpot Diagram\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e\u003cimg alt=\"长友气体\" src=\"https:\/\/omo-oss-image.thefastimg.com\/portal-saas\/new2022072923460166674\/cms\/image\/81fe14cd-4978-41f1-8ef2-a8a235f7e9ce.jpg\" id=\"1699622928933486592\"\u003e\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv id=\"saf-detail-3\" class=\"cbox-57 p_loopItem\"\u003e\n\u003ch3 class=\"e_h3-72 s_summary\"\u003eImages\u003c\/h3\u003e\n\u003cdiv class=\"e_richText-73 s_title clearfix response-transition\"\u003e\n\u003cdiv\u003e\n\u003cp\u003e\u003cimg alt=\"长友气体\" src=\"https:\/\/omo-oss-image.thefastimg.com\/portal-saas\/new2022072923460240318\/cms\/image\/c6b13c98-8ad2-47da-946c-cd100a8b3cc5.jpg\" id=\"1669163569029316608\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cstrong\u003eGiacomoPro76  |  SH2-224  |  Sharpstar 94EDPH + ZWO ASI294MC Pro  |  Optolong L-Ultimate 2\"\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg alt=\"长友气体\" src=\"https:\/\/omo-oss-image.thefastimg.com\/portal-saas\/new2022072923460240318\/cms\/image\/c8e79bec-f262-463e-a61d-25f663734401.jpg\" id=\"1669163568256274432\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cstrong\u003eGiacomoPro76  |  SH2-132  |  Sharpstar 94EDPH + ZWO ASI294MC Pro  |  Optolong L-Ultimate 2\"\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg alt=\"长友气体\" src=\"https:\/\/omo-oss-image.thefastimg.com\/portal-saas\/new2022072923460166674\/cms\/image\/6ac66ce7-c3b3-4ee6-b5c4-d0437515c505.jpg\" id=\"1699618353923121152\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cstrong\u003eSimone Curzi  |  the Soul and Heart Nebulae  |  Sharpstar 94EDPH + ZWO ASI2600MM Pro\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cp\u003eDiscover the extraordinary imaging capabilities of the brand new SharpStar 94EDPH. As the latest addition to the renowned EDPG family, this cutting-edge scope boasts a 94mm aperture and a focal length of 517mm, resulting in an impressive f\/5.5 focal ratio. Engineered with a triplet air-spaced APO lens structure, including two ED glass elements, the 94EDPH excels in correcting aberrations for unparalleled image accuracy.\u003c\/p\u003e\n\u003cp\u003eCapture the wonders of the universe with absolute precision using the SharpStar 94EDPH. Its 94mm aperture and 517mm focal length provide optimal light gathering and superb imaging capabilities. With its advanced triplet air-spaced APO lens design, featuring two ED glass elements, this astrophotography scope delivers exceptional aberration correction, ensuring images of remarkable clarity and accuracy.\u003c\/p\u003e\n\u003cp\u003eUnleash your astrophotography potential with the SharpStar 94EDPH. Its superior optics, combined with its impressive specifications, make it the ultimate tool for capturing stunning celestial images. Immerse yourself in the awe-inspiring beauty of the cosmos and unlock a new level of precision in your astrophotography endeavors.\u003c\/p\u003e\n\u003ch2\u003eSpecifications\u003c\/h2\u003e\n\u003ctable height=\"432\" align=\"center\" cellspacing=\"0\" width=\"487\" id=\"gpt4-chat-selected-text-parent-node\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 532.4px;\" colspan=\"3\"\u003e\n\u003cp\u003e\u003cstrong\u003e94EDPH Parameters\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 123.675px;\"\u003e\n\u003cp\u003e\u003cstrong\u003eAperture size\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd style=\"width: 405.125px;\" colspan=\"2\"\u003e\n\u003cp\u003e\u003cstrong\u003e94mm\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 123.675px;\"\u003e\n\u003cp\u003e\u003cstrong\u003eFocal length\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd style=\"width: 405.125px;\" colspan=\"2\"\u003e\n\u003cp\u003e\u003cstrong\u003e517mm\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 123.675px;\"\u003e\n\u003cp\u003e\u003cstrong\u003eFocal ratio\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd style=\"width: 405.125px;\" colspan=\"2\"\u003e\n\u003cp\u003e\u003cstrong\u003ef\/5.5\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 123.675px;\"\u003e\n\u003cp\u003e\u003cstrong\u003eObjective lens\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd style=\"width: 405.125px;\" colspan=\"2\"\u003e\n\u003cp\u003e\u003cstrong\u003eTriplet air-spaced APO (two is made of ultra-low dispersion ED glass)\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 123.675px;\"\u003e\n\u003cp\u003e\u003cstrong\u003eLimiting magnitude\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd style=\"width: 405.125px;\" colspan=\"2\"\u003e\n\u003cp\u003e\u003cstrong\u003e11.62\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 123.675px;\"\u003e\n\u003cp\u003e\u003cstrong\u003eResolution\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd style=\"width: 405.125px;\"\u003e\n\u003cp\u003e\u003cstrong\u003e1.28 arc-seconds\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 123.675px;\"\u003e\n\u003cp\u003e\u003cstrong\u003eTube length overall\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd style=\"width: 405.125px;\" colspan=\"2\"\u003e\n\u003cp\u003e\u003cstrong\u003e468mm\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 123.675px;\"\u003e\n\u003cp\u003e\u003cstrong\u003eMain tube diameter\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd style=\"width: 405.125px;\" colspan=\"2\"\u003e\n\u003cp\u003e\u003cstrong\u003e118mm\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 123.675px;\"\u003e\n\u003cp\u003e\u003cstrong\u003eWeight\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd style=\"width: 405.125px;\" colspan=\"2\"\u003e\n\u003cp\u003e\u003cstrong\u003e3.3KG\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 123.675px;\"\u003e\n\u003cp\u003e\u003cstrong\u003eAccessories\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd style=\"width: 405.125px;\" colspan=\"2\"\u003e\n\u003cp\u003e\u003cstrong\u003ea pair of tube rings, a dovetail plate, a handle\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e","brand":"Sharpstar","offers":[{"title":"Default Title","offer_id":42269775986865,"sku":"94edph","price":1409.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0523\/1650\/4241\/files\/sharpstar-94edph-f55-triplet-ed-apo-telescope-489309.jpg?v=1718480276"},{"product_id":"sharpstar-z4-100mm-f5-5-sextuplet-apo-astrograph-ota","title":"Sharpstar Z4 100mm f\/5.5 Sextuplet APO Astrograph OTA","description":"\u003ch1\u003eSharpstar Z4 100mm f\/5.5 Sextuplet APO Astrograph OTA\u003c\/h1\u003e\n\u003ch2\u003eProduct Overview\u003c\/h2\u003e\n\u003cp\u003eThe \u003cstrong\u003eSharpstar Z4 100mm f\/5.5 Sextuplet APO Astrograph\u003c\/strong\u003e is designed for astrophotographers who demand precision, portability, and superb optical performance. With a fully corrected field, this fast astrograph eliminates the need for a separate field flattener, delivering sharp, pinpoint stars right to the edge of your frame.\u003c\/p\u003e\n\u003cp\u003eLightweight and \u003cstrong\u003eeasy to carry and assemble\u003c\/strong\u003e, the Sharpstar Z4 is equally at home on a portable mount or a permanent observatory setup.\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0523\/1650\/4241\/files\/sharpstar-z4-100mm-f55-sextuplet-apo-astrograph-ota-745781.jpg?v=1718364959\" alt=\"Sharpstar Z4 100mm f\/5.5 Sextuplet APO Astrograph OTA\"\u003e\u003c\/p\u003e\n\u003ch2\u003eKey Features\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e100mm Sextuplet APO design\u003c\/strong\u003e – six optical elements for exceptional colour correction.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ef\/5.5 fast focal ratio\u003c\/strong\u003e – gather more light in less time for deep-sky astrophotography.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e300mm Vixen-style dovetail plate\u003c\/strong\u003e – secure and reliable mounting for most equatorial mounts.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePrecision focuser\u003c\/strong\u003e with smooth \u003cstrong\u003efocusing and angle adjustment\u003c\/strong\u003e for accurate framing and fine focus control.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFull-frame imaging circle\u003c\/strong\u003e – perfect for modern CMOS and DSLR cameras.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCompact and portable\u003c\/strong\u003e – ideal for travel or field use.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eBenefits for Astrophotographers\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eCapture stunning wide-field nebulae and galaxies with excellent star sharpness.\u003c\/li\u003e\n\u003cli\u003eSave time with a built-in flattener — no extra accessories required.\u003c\/li\u003e\n\u003cli\u003eLightweight OTA ensures \u003cstrong\u003eeasy setup, focusing, and framing\u003c\/strong\u003e even on mid-range mounts.\u003c\/li\u003e\n\u003cli\u003eCompatible with standard accessories thanks to its \u003cstrong\u003eVixen-style dovetail plate\u003c\/strong\u003e.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0523\/1650\/4241\/files\/sharpstar-z4-100mm-f55-sextuplet-apo-astrograph-ota-283716.jpg?v=1718364959\" alt=\"Sharpstar Z4 100mm f\/5.5 Sextuplet APO Astrograph OTA\"\u003e\u003c\/p\u003e\n\u003ch2\u003eWhat’s Included\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eSharpstar Z4 100mm f\/5.5 Sextuplet APO Astrograph OTA\u003c\/li\u003e\n\u003cli\u003eCNC-machined tube rings and handle\u003c\/li\u003e\n\u003cli\u003e300mm Vixen-style dovetail plate\u003c\/li\u003e\n\u003cli\u003eCarry case for transport and storage\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eSpecifications\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eAperture: 100mm\u003c\/li\u003e\n\u003cli\u003eFocal Length: 550mm\u003c\/li\u003e\n\u003cli\u003eFocal Ratio: f\/5.5\u003c\/li\u003e\n\u003cli\u003eOptical Design: Sextuplet APO (6 elements)\u003c\/li\u003e\n\u003cli\u003eBack Focus: 55mm\u003c\/li\u003e\n\u003cli\u003eWeight: Approx. 5.5kg\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eWhy Choose the Sharpstar Z4?\u003c\/h2\u003e\n\u003cp\u003eWhether you’re imaging from a dark-sky site or your backyard, the Sharpstar Z4 delivers professional-grade results with ease. Its \u003cstrong\u003eoptical quality, portability, and versatility\u003c\/strong\u003e make it one of the best choices for astrophotographers seeking wide-field precision in a compact design.\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0523\/1650\/4241\/files\/sharpstar-z4-100mm-f55-sextuplet-apo-astrograph-ota-482696.jpg?v=1718364959\" alt=\"Sharpstar Z4 100mm f\/5.5 Sextuplet APO Astrograph OTA\"\u003e\u003c\/p\u003e\n\u003c!-- Optional FAQ Section with FAQ Schema --\u003e\n\u003cdiv class=\"faq-section\"\u003e\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003ch3\u003eDoes the Sharpstar Z4 require a field flattener?\u003c\/h3\u003e\n\u003cp\u003eNo. The Z4 is a sextuplet design with a built-in flattener, providing a flat imaging field across full-frame sensors.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003ch3\u003eWhat type of dovetail plate does it include?\u003c\/h3\u003e\n\u003cp\u003eThe Sharpstar Z4 comes with a 300mm Vixen-style dovetail plate for secure mounting.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003ch3\u003eIs the Sharpstar Z4 easy to transport?\u003c\/h3\u003e\n\u003cp\u003eYes. At only 5.5kg and supplied with a carry case, the Z4 is lightweight and easy to carry and assemble.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"Sharpstar","offers":[{"title":"Default Title","offer_id":42290260279473,"sku":"Sharpstar-Z4","price":2149.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0523\/1650\/4241\/files\/sharpstar-z4-100mm-f55-sextuplet-apo-astrograph-ota-558466.jpg?v=1758101028"},{"product_id":"sharpstar-140ph-140mm-f-6-5-dual-ed-triplet-apo","title":"SharpStar 140PH 140mm f\/6.5 Dual ED Triplet APO","description":"\u003ch1\u003eSharpStar 140PH 140mm f\/6.5 Dual ED Triplet APO Apochromatic Refractor Telescope\u003c\/h1\u003e\n\u003ch2\u003eThe serious amateur's astro photo instrument with a pioneering (in this size) dual ED optical system. A fast triplet APO with 910mm focal length, with incredible colour correction, excellent choice for both astro photography and nature photography!\u003c\/h2\u003e\n\u003ch2\u003e\u003cspan\u003eFOR FULL FRAME IMAGING!\u003c\/span\u003e\u003c\/h2\u003e\n\u003ch2\u003e\u003cspan\u003eIf the above is not enough, combine it with a dedicated 0.73x 3\" focal reducer and enjoy a super fast f\/4.8 Sextuplet APO!\u003c\/span\u003e\u003c\/h2\u003e\n\u003cp\u003e\u003cspan\u003e\u003ca href=\"https:\/\/www.365astronomy.com\/image\/cache\/wp\/ij\/content\/sharpstar-140ph-140mm-f-6.5-dual-ed-triplet-apo-apochromatic-refractor-telescope-7.webp\"\u003e\u003cimg src=\"https:\/\/www.365astronomy.com\/image\/cache\/wp\/ij\/content\/sharpstar-140ph-140mm-f-6.5-dual-ed-triplet-apo-apochromatic-refractor-telescope-7.webp\" alt=\"\"\u003e\u003c\/a\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e365ASTRONOMY TESTING PROCEDURES\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eWe would usually test about 30 - 60% of  the arriving Sharpstar and Askar telescopes (except the smallest ones in the FMA and ACL range). This will provide us with a good understanding of the quality of that batch of optics. We would also test the focuser and check the optical tube, tube rings and dovetail bar and accessories for any visible damage or fault and take a series of test images with a full frame dSLR camera of a specially designed test chart that will show whether the telescope is fit for a full frame sensor or not, whether the image is flat in all corners and generally it will indicate the quility of the optics, i.e. resolution. Whilst we do store this information for all tested telescopes, we don't usually include a printed report, but if you ask, we might be able to send it to you). If we find that the optics are not correctly collimated then we will send them to a specialist to correct it or if the optics cannot be corrected to a good performance then those will be sent back to the manufacturer for replacement, although our experience with Sharpstar and Asker telescopes is quite good, we rarely had to do that. We believe that there is no need to offer complicated optical test reports that would assume a degree in optical sciences from the user to fully understand them.  \u003c\/p\u003e\n\u003ch2\u003e\u003cspan\u003eSharpStar 140PH telescope features:\u003c\/span\u003e\u003c\/h2\u003e\n\u003cp\u003e\u003cspan\u003e• 140MM f\/6.5 three-element full separation (air spaced) optical design\u003cbr\u003e• D\u003c\/span\u003eual ED ultra-low dispersion glass\u003cbr\u003e\u003cspan\u003e• Multi-layer coating\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003e• 4\" dual-speed rack and pinion focuser, 10:1 fine focus\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003e• 2\" and 1.25\" universal interfaces\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003e• Angle adjuster for 360 degree rotation\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003e• Dovetail bar with tube rings\u003cbr\u003e• Comes with a finderscope shoe\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003e• Hard case included\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003ca href=\"https:\/\/www.365astronomy.com\/image\/cache\/wp\/ij\/content\/sharpstar-140ph-140mm-f-6.5-dual-ed-triplet-apo-apochromatic-refractor-telescope-3.webp\"\u003e\u003cimg src=\"https:\/\/www.365astronomy.com\/image\/cache\/wp\/ij\/content\/sharpstar-140ph-140mm-f-6.5-dual-ed-triplet-apo-apochromatic-refractor-telescope-3.webp\" alt=\"\"\u003e\u003c\/a\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cem\u003eAbove image: with fully opened lens shade.\u003c\/em\u003e\u003c\/p\u003e\n\u003cp\u003e\u003ca href=\"https:\/\/www.365astronomy.com\/image\/cache\/wp\/ij\/content\/sharpstar-140ph-140mm-f-6.5-dual-ed-triplet-apo-apochromatic-refractor-telescope-4.webp\"\u003e\u003cimg src=\"https:\/\/www.365astronomy.com\/image\/cache\/wp\/ij\/content\/sharpstar-140ph-140mm-f-6.5-dual-ed-triplet-apo-apochromatic-refractor-telescope-4.webp\" alt=\"\"\u003e\u003c\/a\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cem\u003eAbove image: with retracted lens shade.\u003c\/em\u003e\u003c\/p\u003e\n\u003cdiv\u003e\u003cstrong\u003e\u003cspan\u003eProduct parameters:\u003c\/span\u003e\u003c\/strong\u003e\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cdiv\u003e\u003cspan\u003eModel: Ruixing  \/  SharpStar 140PH\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003eObjective type: 3-piece fully separated APO\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003eEffective aperture: 140mm\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003eFocal length: 910mm\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003eFocus ratio: f\/6.5\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003eFully illuminated image circle: 44mm\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003eResolution: 0.83 arc seconds\u003cbr\u003eVisual limit: 12.5 magnitude\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003eAccessories included: a pair of tube rings and dovetail bar\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003eMain tube outer diameter: 148mm (tube ring size)\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003eNet weight: 10.1kg (excluding tube rings and dovetail plate)\u003cbr\u003eGross weight: 11.7kg (inc. tube rings, dovetail bar and handle)\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003eLenght: 876mm (with extended lens shade) 739mm (with closed down lens shade)\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003e\u003ca href=\"https:\/\/www.365astronomy.com\/image\/cache\/wp\/ij\/content\/sharpstar-140ph-140mm-f-6.5-dual-ed-triplet-apo-apochromatic-refractor-telescope-5.webp\"\u003e\u003cimg src=\"https:\/\/www.365astronomy.com\/image\/cache\/wp\/ij\/content\/sharpstar-140ph-140mm-f-6.5-dual-ed-triplet-apo-apochromatic-refractor-telescope-5.webp\" alt=\"\"\u003e\u003c\/a\u003e\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003e\u003ca href=\"https:\/\/www.365astronomy.com\/image\/cache\/wp\/ij\/content\/sharpstar-140ph-140mm-f-6.5-dual-ed-triplet-apo-apochromatic-refractor-telescope-8.webp\"\u003e\u003cimg src=\"https:\/\/www.365astronomy.com\/image\/cache\/wp\/ij\/content\/sharpstar-140ph-140mm-f-6.5-dual-ed-triplet-apo-apochromatic-refractor-telescope-8.webp\" alt=\"\"\u003e\u003c\/a\u003e\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cspan\u003e\u003ca href=\"https:\/\/www.365astronomy.com\/image\/cache\/wp\/lj\/product\/SHS-86SQ-sharpstar-86sq-quadruplet-apochromatic-refractor-telescope-5.webp\"\u003e\u003cimg src=\"https:\/\/www.365astronomy.com\/image\/cache\/wp\/lj\/product\/SHS-86SQ-sharpstar-86sq-quadruplet-apochromatic-refractor-telescope-5.webp\" alt=\"\"\u003e\u003c\/a\u003e\u003c\/span\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cp data-mce-fragment=\"1\"\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003e\u003cbr\u003e\u003c\/p\u003e","brand":"Sharpstar","offers":[{"title":"Default Title","offer_id":42440214544561,"sku":"SHS-140PH","price":4290.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0523\/1650\/4241\/files\/sharpstar-140ph-140mm-f65-dual-ed-triplet-apo-937497.webp?v=1718364985"},{"product_id":"sharpstar-13028hnt-130mm-super-fast-f-2-8-hyperboloid-newtonian-reflector-telescope-red","title":"SharpStar 13028HNT 130mm Super-Fast f\/2.8 Hyperboloid Newtonian Reflector Telescope - RED","description":"\u003ch1\u003eSharpStar 13028HNT 130mm Super-Fast f\/2.8 Hyperboloid Newtonian Reflector Telescope with Carbon Fibre Tube\u003cbr\u003e\n\u003c\/h1\u003e\n\u003cp\u003e\u003cspan\u003eSharpstar took the initiative in launching the very first 150mm hyperbolic Newtonian reflective telescope with an extremely-fast focal ratio of f\/2.8 just a few years ago. We are referring to the very popular 15028HNT that has garnered a quite large following since its advent. Not indulging in this great achievement, Sharpstar keeps on with their creativity and dynamism, and now introducing the new 13028HNT to their customers, which has a same focal ratio but a slightly smaller aperture.\u003c\/span\u003e\u003cbr\u003e\u003cbr\u003e\u003cspan\u003eThe 13028HNT, with a hyperbolic primary mirror, produces round and sharp stars within the full-frame format and supports a 44mm imaging circle. Compared with the more widely used focal  ratio of f\/4, the 13028HNT can attain the same image brightness with almost half of the exposure time. Additionally, due to its compact and concise design of the telescope tube, it will certainly create huge interest on the market. Users who need a compact, but extremely fast travel telescope would benefit immencely.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e365ASTRONOMY TESTING PROCEDURES\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eWe would usually test about 30 - 60% of  the arriving Sharpstar and Askar telescopes (except the smallest ones in the FMA and ACL range). This will provide us with a good understanding of the quality of that batch of optics. We would also test the focuser and check the optical tube, tube rings and dovetail bar and accessories for any visible damage or fault and take a series of test images with a full frame dSLR camera of a specially designed test chart that will show whether the telescope is fit for a full frame sensor or not, whether the image is flat in all corners and generally it will indicate the quility of the optics, i.e. resolution. Whilst we do store this information for all tested telescopes, we don't usually include a printed report, but if you ask, we might be able to send it to you). If we find that the optics are not correctly collimated then we will send them to a specialist to correct it or if the optics cannot be corrected to a good performance then those will be sent back to the manufacturer for replacement, although our experience with Sharpstar and Asker telescopes is quite good, we rarely had to do that. We believe that there is no need to offer complicated optical test reports that would assume a degree in optical sciences from the user to fully understand them.  \u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/www.365astronomy.com\/image\/cache\/wp\/lj\/product\/SHARPSTAR\/sharpstar-13028hnt-130mm-super-fast-f-2.8-hyperboloid-newtonian-reflector-telescope-red-3.webp\"\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eThe primary mirror is made of a Pyrex-alike glass PZ33. The thermal expansion coefficient is smaller than that of ordinary glass. The dielectric multilayer coating makes the primary mirror obtain a highly reflective surface of up to 97%. The minor axis of the secondary mirror is 65mm, enabling sufficient illumination for full-frame imaging. It's worth mentioning that the coma corrector is a two-part refractive-lens set, one of which is an ED glass, aiming to simplify the optical system while enhancing the aberration correction level.\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003e \u003c\/span\u003e\u003cbr\u003e\u003cspan\u003eThe telescope tube is totally made of high-end carbon fiber material to achieve a lightweight design whilst creating an artistically beautiful instrument. All the component parts are from CNC constructed metals. The pair of tube rings feature pierced design. Although it increased the production cost, but it will certainly offer an extraordinary customer experience because of its lightweight and detail-oriented design concept.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch2\u003e\n\u003cimg src=\"https:\/\/www.365astronomy.com\/image\/cache\/wp\/lj\/product\/SHARPSTAR\/sharpstar-13028hnt-130mm-super-fast-f-2.8-hyperboloid-newtonian-reflector-telescope-red-4.webp\"\u003e\u003cspan\u003e\u003c\/span\u003e\n\u003c\/h2\u003e\n\u003ch2\u003e\n\u003cspan\u003eThe focuser is a 2.5\" rack-and-pinion device. It is equipped with coarse as well as fine adjustment hand knobs to further improve the focusing precision. The focuser is tapped with M63 thread which can be switched into a more general M48×0.75 thread with a proper adapter ring (included). Thus the users may have a wider range of options in connecting other astronomy accessories to the focuser. The back-focus is standard 55mm(starting from the base of the mounting thread on the adapter ring’s housing), which is user-friendly for newcomers.\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003e \u003c\/span\u003e\u003cbr\u003e\u003cspan\u003eA versatile handle and a standard Vixen-style dovetail plate are also included in the 13028HNT package, which may be of convenience for users to attach other potential accessories and to place the telescope on various equatorial mounts.\u003c\/span\u003e\n\u003c\/h2\u003e\n\u003ch2\u003e\n\u003cspan\u003e\u003c\/span\u003e\u003cbr\u003e\n\u003c\/h2\u003e\n\u003ch2\u003e\u003cspan\u003eAlthough the telescope doesn't come with an instruction manual, one of our friends has written a nice tutorial that is available via his website.\u003c\/span\u003e\u003c\/h2\u003e\n\u003ch2\u003e\u003cspan\u003eClick here for  \u003ca href=\"https:\/\/www.stastrophotography.com\/a-step-by-step-guide-to-collimation\/\" target=\"_blank\"\u003e\u003cb\u003eA STEP BY STEP GUIDE TO COLLIMATION\u003c\/b\u003e by Simon Todd.\u003c\/a\u003e  Link shared with his permission.\u003c\/span\u003e\u003c\/h2\u003e\n\u003ch2\u003e\n\u003cimg src=\"https:\/\/www.365astronomy.com\/image\/cache\/wp\/lj\/product\/SHARPSTAR\/sharpstar-13028hnt-130mm-super-fast-f-2.8-hyperboloid-newtonian-reflector-telescope-red-5.webp\"\u003e\u003cspan\u003e\u003c\/span\u003e\n\u003c\/h2\u003e\n\u003ch2\u003e\n\u003cspan\u003e\u003c\/span\u003e\u003cbr\u003e\n\u003c\/h2\u003e\n\u003ch2\u003e\u003cspan\u003eTechnical parameters:\u003c\/span\u003e\u003c\/h2\u003e\n\u003ch2\u003e\u003cspan\u003eAperture：130mm\u003c\/span\u003e\u003c\/h2\u003e\n\u003cp\u003e\u003cspan\u003eFocal length of primary mirror：364mm\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003eFocal ratio of primary mirror：f\/2.8\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003ePrimary mirror type：Hyperbolic reflective mirror\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003ePrimary mirror material：PZ33（similar to Pyrex glass）\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003eCorrector：two-element air-spaced refractive lenses（including one ED glass）\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003eMinor axis of secondary mirror：65mm\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003eImage circle：44mm\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003eField of view：6.9 degree\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003eMain tube material：High-end carbon fiber\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003eMain tube outer diameter：174mm\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003eMain tube length：394mm\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003eNet weight：3.2kg\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003eGross weight：4.3kg（including protective cap, tube rings, handle and Vixen-style dovetail plate）\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003eResolution：0.89 arc second\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003eFocuser：2.5\" with fine-adjustment\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003eLimiting visual magnitude：12.3\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003eBack-focus：55mm\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003eBOX DIMENSIONS\/WEIGHT: 38 x 42 x 64 cm, 11.5kg\u003c\/p\u003e\n\u003cp\u003e\u003cem\u003e*Please note, eyepiece is not included.\u003c\/em\u003e\u003cspan\u003e\u003c\/span\u003e\u003cbr\u003e \u003c\/p\u003e\n\u003cdiv\u003e \u003c\/div\u003e\n\u003cdiv\u003e \u003cimg src=\"https:\/\/www.365astronomy.com\/image\/cache\/wp\/lj\/product\/SHARPSTAR\/sharpstar-13028hnt-130mm-super-fast-f-2.8-hyperboloid-newtonian-reflector-telescope-red-6.webp\" height=\"771\" width=\"1024\"\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e \u003c\/div\u003e\n\u003cdiv\u003e \u003c\/div\u003e\n\u003cdiv\u003e\n\u003ca href=\"https:\/\/www.365astronomy.com\/image\/cache\/wp\/ij\/content\/1c-sharpstar-15028hnt-150mm-super-fast-f-2.8-hyperboloid-newtonian-reflector-telescope.webp\"\u003e \u003c\/a\u003e\u003cimg src=\"https:\/\/www.365astronomy.com\/image\/cache\/wp\/lj\/product\/SHARPSTAR\/sharpstar-13028hnt-130mm-super-fast-f-2.8-hyperboloid-newtonian-reflector-telescope-red-7.webp\" height=\"769\" width=\"1024\"\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e \u003c\/div\u003e\n\u003cdiv\u003e \u003c\/div\u003e\n\u003cdiv\u003e \u003c\/div\u003e\n\u003cdiv\u003e\u003ca href=\"https:\/\/www.365astronomy.com\/image\/cache\/wp\/ij\/content\/960px-sharpstar-15028hnt-150mm-super-fast-f-2.8-hyperboloid-newtonian-reflector-telescope-case.webp\"\u003e\u003cimg src=\"https:\/\/www.365astronomy.com\/image\/cache\/wp\/ij\/content\/960px-sharpstar-15028hnt-150mm-super-fast-f-2.8-hyperboloid-newtonian-reflector-telescope-case.webp\" alt=\"\"\u003e\u003c\/a\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cem\u003eThe SharpStar 13028HNT comes in a very sturdy carrying case.\u003c\/em\u003e\u003c\/div\u003e\n\u003cdiv\u003e \u003c\/div\u003e\n\u003ch3\u003eSAMPLE IMAGES\u003c\/h3\u003e\n\u003cp\u003eClick here to see the original image:\u003cspan\u003e \u003c\/span\u003e\u003ca href=\"http:\/\/www.sharpstar-optics.com\/Upload\/161882073456.jpg\"\u003eOrion-Horsehead-Flame Image by Sharpstar 13028HNT\u003c\/a\u003e\u003c\/p\u003e\n\u003cp\u003eBelow image has been heavily reduced in size: appr. 1\/3 of the original size.\u003c\/p\u003e\n\u003cdiv\u003e \u003c\/div\u003e\n\u003cdiv\u003e \u003c\/div\u003e\n\u003cdiv\u003e \u003c\/div\u003e\n\u003cdiv\u003e \u003cimg src=\"https:\/\/www.365astronomy.com\/image\/cache\/wp\/lj\/product\/SHARPSTAR\/sharpstar-13028hnt-130mm-super-fast-f-2.8-hyperboloid-newtonian-reflector-telescope-red-8-orion-horsehead-flame-1100px.webp\" height=\"736\" width=\"1100\"\u003e\n\u003c\/div\u003e","brand":"Sharpstar","offers":[{"title":"Default Title","offer_id":42440216871089,"sku":"SHS-13028HNT","price":1769.0,"currency_code":"GBP","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0523\/1650\/4241\/files\/sharpstar-13028hnt-130mm-super-fast-f28-hyperboloid-newtonian-reflector-telescope-red-637659.webp?v=1718364953"},{"product_id":"sharpstar-sca260-v2-aspherical-cassegrain-telescope-260mm-f-5","title":"SharpStar SCA260 V2 Aspherical Cassegrain Telescope 260mm f\/5","description":"\u003ch2 data-mce-fragment=\"1\"\u003eSharpStar SCA260 Aspherical Cassegrain Telescope 260mm - Fast f\/5 Optics\u003c\/h2\u003e\n\u003ch2 data-mce-fragment=\"1\"\u003eThis is the version 2 that comes with some improvements (i.e. better focuser).\u003c\/h2\u003e\n\u003ch2 data-mce-fragment=\"1\"\u003eThe serious amateur's large astro photo instrument for deepsky, at the edge of portability, this fast Cassegrain is recommended mainly for astro photography!\u003c\/h2\u003e\n\u003ch2 data-mce-fragment=\"1\"\u003e\u003cspan data-mce-fragment=\"1\"\u003eFOR FULL FRAME IMAGING!\u003c\/span\u003e\u003c\/h2\u003e\n\u003cp data-mce-fragment=\"1\"\u003e\u003cspan data-mce-fragment=\"1\"\u003eThis might be a good alternative to Schmidth-Cassegrain telescopes as it sits nicely somewhere between a f\/10 SCT (like a Celkestron 11\" Edge HD) and a 11\" RASA, but for a very similar cost to an 11\" Edge HD you got a much faster instrument at f\/5. Additional bonuses are the cooling fans and the heavy duty rack and pinion focuser, not to mention the so important carbon fiber tube...\u003c\/span\u003e\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003e \u003c\/p\u003e\n\u003ch2 data-mce-fragment=\"1\"\u003e\u003cspan data-mce-fragment=\"1\"\u003eSharpStar SCA260 telescope features:\u003c\/span\u003e\u003c\/h2\u003e\n\u003cp data-mce-fragment=\"1\"\u003e\u003cspan data-mce-fragment=\"1\"\u003e• 260MM f\/5 Aspherical Cassegrain optical design with triplet field flattener\u003cbr data-mce-fragment=\"1\"\u003e• Primary mirror material: PZ33 (sma as pyrex glass)\u003cbr data-mce-fragment=\"1\"\u003e• Secondary mirror: spherical\u003c\/span\u003e\u003cbr data-mce-fragment=\"1\"\u003e\u003cspan data-mce-fragment=\"1\"\u003e• Image circle: 80mm\u003c\/span\u003e\u003cbr data-mce-fragment=\"1\"\u003e\u003cspan data-mce-fragment=\"1\"\u003e• Tube material: carbon fiber\u003c\/span\u003e\u003cbr data-mce-fragment=\"1\"\u003e\u003cspan data-mce-fragment=\"1\"\u003e• Outer diameter of tube: 280.5mm\u003c\/span\u003e\u003cbr data-mce-fragment=\"1\"\u003e\u003cspan data-mce-fragment=\"1\"\u003e• \u003c\/span\u003eTube length: 712mm\u003cbr data-mce-fragment=\"1\"\u003e\u003cspan data-mce-fragment=\"1\"\u003e• \u003c\/span\u003eTube weight: 15kg\u003cbr data-mce-fragment=\"1\"\u003e\u003cspan data-mce-fragment=\"1\"\u003e• \u003c\/span\u003eResolution: 0.46\u003cbr data-mce-fragment=\"1\"\u003e\u003cspan data-mce-fragment=\"1\"\u003e• \u003c\/span\u003eFocuser: 3.2 inch\u003cbr data-mce-fragment=\"1\"\u003e\u003cspan data-mce-fragment=\"1\"\u003e• \u003c\/span\u003eVisual limiting magnitude: 13.8\u003cbr data-mce-fragment=\"1\"\u003e\u003cspan data-mce-fragment=\"1\"\u003e• \u003c\/span\u003eBack focus: 75mm (calculated from the end of M48 thread)\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003e \u003c\/p\u003e\n\u003cdiv data-mce-fragment=\"1\"\u003e\u003cspan data-mce-fragment=\"1\"\u003eThe SharpStar SCA 260 is a beautifully designed unique optical intrument from Sharpstar!\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv data-mce-fragment=\"1\"\u003e \u003c\/div\u003e\n\u003cdiv data-mce-fragment=\"1\"\u003eSharpstar-optics is excited to launch their newest telescope, an Aspherical Cassegrain OTA SCA260 with short focal ratio. The primary mirror is aspherical with a more complicated grinding task that is reflected in the price. Testing requirements are also more complex than traditional primary mirrors. Its carbon fiber tube is lightweight, durable and nice looking, and the use Pyrex-like materials provides a better controlled quality than traditional materials.\u003cbr data-mce-fragment=\"1\"\u003eThe primary and secondary mirrors are all made with enhanced aluminum coating, and the reflectivity is guaranteed to be above 95%. The secondary mirror has a new lever adjustment function that can be moved in a horizontal position. The 3-inch dedicated focuser ensures smooth operation without slipping when taking photos with heavy accessories.\u003cbr data-mce-fragment=\"1\"\u003eAll CNC aluminum parts and novel hollow handles can be connected to different accessories. The appearance and mechanical quality are of high standards. Its design is to meet the needs of today’s demanding astronomer.\u003cbr data-mce-fragment=\"1\"\u003eThe optical path includes a triplet 3\" field flattener, thus ensuring full-frame photography and vignetting control. The two M54×0.75 threads and M48×0.75 threads at the rear of the focuser can meet different needs and are convenient to connect to most commercially available imaging-terminals and help to achieve perfect focus.\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\/sharpstar-sca260-aspherical-cassegrain-telescope-260mm-f-5-ca.webp\" data-mce-fragment=\"1\"\u003e\u003cimg alt=\"\" src=\"https:\/\/www.365astronomy.com\/image\/cache\/wp\/ij\/content\/sharpstar-sca260-aspherical-cassegrain-telescope-260mm-f-5-ca.webp\" data-mce-fragment=\"1\"\u003e\u003c\/a\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\/sharpstar-sca260-aspherical-cassegrain-telescope-260mm-f-5-d.webp\" data-mce-fragment=\"1\"\u003e\u003cimg alt=\"\" src=\"https:\/\/www.365astronomy.com\/image\/cache\/wp\/ij\/content\/sharpstar-sca260-aspherical-cassegrain-telescope-260mm-f-5-d.webp\" data-mce-fragment=\"1\"\u003e\u003c\/a\u003e\u003c\/div\u003e\n\u003cdiv data-mce-fragment=\"1\"\u003e \u003c\/div\u003e\n\u003ch3 data-mce-fragment=\"1\"\u003eUser contributions:\u003c\/h3\u003e\n\u003cdiv data-mce-fragment=\"1\"\u003e\n\u003ch4 data-mce-fragment=\"1\"\u003e\n\u003cspan data-mce-fragment=\"1\"\u003e\u003cstrong data-mce-fragment=\"1\"\u003eMELOTTE 15 – “THE HEART OF THE HEART NEBULA”\u003c\/strong\u003e\u003c\/span\u003e\u003cspan data-mce-fragment=\"1\"\u003e\u003c\/span\u003e\n\u003c\/h4\u003e\n\u003cul data-mce-fragment=\"1\"\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\u003cspan data-mce-fragment=\"1\"\u003eSubject:                              Melotte 15 – “The Heart of the Heart Nebula”\u003c\/span\u003e\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\u003cspan data-mce-fragment=\"1\"\u003eImaging OTA:                     Sharpstar SCA260 – 1300mm, f\/5.0\u003c\/span\u003e\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\u003cspan data-mce-fragment=\"1\"\u003eImaging Camera:               ZWO ASI2600MM-PRO\u003c\/span\u003e\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\u003cspan data-mce-fragment=\"1\"\u003eFilters:                      \u003cwbr data-mce-fragment=\"1\"\u003e           Antlia 2” Narrowband: Ha (3nm); Sii (3.5nm); Oiii (3.5nm)\u003c\/wbr\u003e\u003c\/span\u003e\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\u003cspan data-mce-fragment=\"1\"\u003eFilter Wheel:                      ZWO 7 x 2”\u003c\/span\u003e\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\u003cspan data-mce-fragment=\"1\"\u003eGuide System:                    ZWO OAG-L with ZWO ASI174MM camera\u003c\/span\u003e\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\u003cspan data-mce-fragment=\"1\"\u003eMount:                        \u003cwbr data-mce-fragment=\"1\"\u003e        Skywatcher EQ6-R\u003c\/wbr\u003e\u003c\/span\u003e\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\u003cspan data-mce-fragment=\"1\"\u003eCapture Details:                 Ha: 30 x 300s; Sii: 26 x 300s; Oiii: 26 x 300s\u003c\/span\u003e\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\u003cspan data-mce-fragment=\"1\"\u003eIntegration time: 6h40’\u003c\/span\u003e\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\u003cspan data-mce-fragment=\"1\"\u003eBortle 4 over 4 nights\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-mce-fragment=\"1\"\u003e\u003cspan data-mce-fragment=\"1\"\u003e\u003c\/span\u003eCourtesy of Alistair Scobie\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003e(Please note, below is a 900px wide version, but if you click on it, you will see a 1600px wide version. The original was even larger, but we had to reduce it to 1600pixels width as that's the max our shopping cart system allows...)\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv data-mce-fragment=\"1\"\u003e\u003ca href=\"https:\/\/www.365astronomy.com\/image\/cache\/wp\/lj\/product\/SHARPSTAR\/SCA260\/Melotte_15_B-Alistair-Scobie-SCA260-ASI2600MM-PRO.webp\" data-mce-fragment=\"1\"\u003e\u003cimg alt=\"\" src=\"https:\/\/www.365astronomy.com\/image\/cache\/wp\/lj\/product\/SHARPSTAR\/SCA260\/Melotte_15_B-Alistair-Scobie-SCA260-ASI2600MM-PRO.webp\" data-mce-fragment=\"1\"\u003e\u003c\/a\u003e\u003c\/div\u003e","brand":"Sharpstar","offers":[{"title":"Default Title","offer_id":42440219787441,"sku":"SHS-SCA260-V2","price":4390.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0523\/1650\/4241\/files\/sharpstar-sca260-v2-aspherical-cassegrain-telescope-260mm-f5-955242.webp?v=1718480280"},{"product_id":"sharpstar-15028hnt-hyperbolic-newtonian-astrograph","title":"Sharpstar 15028HNT Hyperbolic Newtonian f\/2.8 Astrograph","description":"\u003ch2\u003eSharpstar 15028HNT Hyperbolic Newtonian\u003c\/h2\u003e\n\u003cp\u003eThe \u003cstrong\u003eSharpstar 15028HNT\u003c\/strong\u003e is a fast \u003cstrong\u003ef\/2.8 Newtonian astrograph\u003c\/strong\u003e optimized for astrophotography. With a 150mm aperture and hyperbolic mirror design, it provides excellent wide-field deep-sky imaging capabilities.\u003c\/p\u003e\n\u003ch3\u003eKey Features\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eAperture:\u003c\/strong\u003e 150mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFocal Length:\u003c\/strong\u003e 420mm (f\/2.8)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDesign:\u003c\/strong\u003e Hyperbolic Newtonian with built-in corrector\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUse:\u003c\/strong\u003e Deep-sky astrophotography\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eWhy Choose the 15028HNT?\u003c\/h3\u003e\n\u003cp\u003eThis telescope offers an affordable and powerful option for wide-field astrophotography. Its fast focal ratio enables shorter exposures, while the corrector ensures edge-to-edge sharpness.\u003c\/p\u003e\n\u003ch3\u003eIdeal For\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eDeep-sky astrophotography\u003c\/li\u003e\n\u003cli\u003eWide-field nebulae and galaxy imaging\u003c\/li\u003e\n\u003cli\u003eAstrophotographers seeking a fast Newtonian\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cdiv class=\"cbox-57 p_loopItem\" id=\"saf-detail-0\"\u003e\n\u003cdiv class=\"e_richText-73 s_title clearfix response-transition\"\u003e\n\u003cdiv class=\"ce_detail\" data-layout=\"flow\" id=\"ce_detail-275106\"\u003e\n\u003cdiv class=\"ie_grid\" id=\"ie_grid-1667527470797\"\u003e\n\u003cdiv class=\"ie_grid signal\"\u003e\n\u003cdiv class=\"e_box e_box-000 p_gridbox response-transition\"\u003e\n\u003cdiv class=\"e_box e_box-000 d_gridCell_0 p_gridCell response-transition\" id=\"content_ie-1667527470797-0\"\u003e\n\u003cdiv class=\"ie_grid\" id=\"ie_grid-1667527470802\"\u003e\n\u003cdiv class=\"ie_grid signal\"\u003e\n\u003cdiv class=\"e_box e_box-000 p_gridbox response-transition\"\u003e\n\u003cdiv class=\"e_box e_box-000 d_gridCell_0 p_gridCell response-transition\" id=\"content_ie-1667527470802-0\"\u003e\n\u003cdiv class=\"ie_fimg\" id=\"ie_fimg-1667527470807\"\u003e\n\u003cdiv\u003e\u003cimg src=\"https:\/\/omo-oss-image.thefastimg.com\/portal-saas\/new2022072923460240318\/cms\/image\/69315635-87b4-48ac-a4d8-e9c858a58295.jpg\" alt=\"长友气体\"\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"ie_grid\" id=\"ie_grid-1667527470812\"\u003e\n\u003cdiv class=\"ie_grid signal\"\u003e\n\u003cdiv class=\"e_box e_box-000 p_gridbox\"\u003e\n\u003cdiv class=\"e_box e_box-000 d_gridCell_0 p_gridCell\" id=\"content_ie-1667527470812-0\"\u003e\n\u003cdiv class=\"reset_style\" id=\"ie_text-1669371196712\"\u003e\n\u003cdiv\u003e\n\u003cp\u003e\u003cspan\u003eThe launch of Sharpstar 15028HNT, a fast-focal-ratio hyperbolic Newtonian astrograph, fills up the existing service gap in domestic market. Compared with the conventional parabolic mirror, the process of producing, manufacturing and testing hyperbolic mirror is much more intricate.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eThe astrograph comes second to no one considering its rather fast focal ratio. The telescope is wrapped with durable carbon fiber material, artistically enhancing its appearance while sharply decreasing its weight. Sharpstar 15028HNT adopts Pyrex-alike glass, enabling the mirror to reach a quite stable reflectivity.\u003cbr\u003e \u003cbr\u003eBoth primary and secondary mirrors wear enhanced aluminum coating, thus keeping a reflective rate at more than 96%. The one-piece X-shaped strut of the secondary mirror keeps a solid and unbreakable structure. 2.5\" rack-and-pinion focuser has a stronger load capacity and can be smoothly adjusted.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eThe delicately pierced handle bar is completely made from CNC-manufactured aluminum, which can be used as a base for the attachment of other accessories. The new design of the telescope handle can aesthetically and mechanically cater to the demands of enthusiasts.\u003cbr\u003e \u003cbr\u003eA three-element corrector is laid in the optical path, enabling the whole optical system to better achieve full-frame imaging and control the vignette. The standard 55mm back-focus and M48×0.75 thread tapped on the focuser thoroughly prepare the telescope for most stock imaging devices and make sure the item in the objective lens can be perfectly projected onto the focal plane.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"cbox-57 p_loopItem\" id=\"saf-detail-1\"\u003e\n\u003ch3 class=\"e_h3-72 s_summary\"\u003eSpecifications\u003c\/h3\u003e\n\u003cdiv class=\"e_richText-73 s_title clearfix\"\u003e\n\u003ctable align=\"center\" cellspacing=\"0\" width=\"84.20%\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd colspan=\"3\"\u003e\n\u003cp\u003e\u003cstrong\u003e15028HNT\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp\u003e\u003cstrong\u003eAperture size\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd colspan=\"2\"\u003e\n\u003cp\u003e\u003cstrong\u003e150mm\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp\u003e\u003cstrong\u003eFocal length\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd colspan=\"2\"\u003e\n\u003cp\u003e\u003cstrong\u003e420mm\/F2.8\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp\u003e\u003cstrong\u003ePrimary mirror type\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd colspan=\"2\"\u003e\n\u003cp\u003e\u003cstrong\u003eHyperboloid\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp\u003e\u003cstrong\u003eCorrector type\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd colspan=\"2\"\u003e\n\u003cp\u003e\u003cstrong\u003eTriplet air-spaced\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp\u003e\u003cstrong\u003eShort axis diameter of secondary mirror\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd colspan=\"2\"\u003e\n\u003cp\u003e\u003cstrong\u003e70mm\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp\u003e\u003cstrong\u003eFully illuminated image circle\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd colspan=\"2\"\u003e\n\u003cp\u003e\u003cstrong\u003e44mm\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp\u003e\u003cstrong\u003eActual field\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd colspan=\"2\"\u003e\n\u003cp\u003e\u003cstrong\u003e6 degree\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp\u003e\u003cstrong\u003eMain tube material\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd colspan=\"2\"\u003e\n\u003cp\u003e\u003cstrong\u003eCarbon fiber\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp\u003e\u003cstrong\u003eMain tube outer diameter\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd colspan=\"2\"\u003e\n\u003cp\u003e\u003cstrong\u003e195mm\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp\u003e\u003cstrong\u003eMain tube length\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd colspan=\"2\"\u003e\n\u003cp\u003e\u003cstrong\u003e445mm\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp\u003e\u003cstrong\u003eNet weight\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd colspan=\"2\"\u003e\n\u003cp\u003e\u003cstrong\u003e4.45kg\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp\u003e\u003cstrong\u003eGross weight\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd colspan=\"2\"\u003e\n\u003cp\u003e\u003cstrong\u003e5.95kg (including tube cap, handle, tube rings and dovetail plate)\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp\u003e\u003cstrong\u003eResolution\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd colspan=\"2\"\u003e\n\u003cp\u003e\u003cstrong\u003e0.77 arc second\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp\u003e\u003cstrong\u003eFocuser\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd colspan=\"2\"\u003e\n\u003cp\u003e\u003cstrong\u003e 2.5”microdrive focusing\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp\u003e\u003cstrong\u003eLimiting visual magnitude\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd colspan=\"2\"\u003e\n\u003cp\u003e\u003cstrong\u003e12.7\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp\u003e\u003cstrong\u003eBack-focus\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd colspan=\"2\"\u003e\n\u003cp\u003e\u003cstrong\u003e55mm\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cimg id=\"1599610150930776064\" src=\"https:\/\/omo-oss-image.thefastimg.com\/portal-saas\/new2022072923460240318\/cms\/image\/a15f9c08-b10d-4b80-8995-7566766e47eb.jpg\" alt=\"长友气体\"\u003e\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"cbox-57 p_loopItem\" id=\"saf-detail-2\"\u003e\n\u003ch3 class=\"e_h3-72 s_summary\"\u003eVideo\u003c\/h3\u003e\n\u003cdiv class=\"e_richText-73 s_title clearfix\"\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"cbox-57 p_loopItem\" id=\"saf-detail-3\"\u003e\n\u003ch3 class=\"e_h3-72 s_summary\"\u003eImages\u003c\/h3\u003e\n\u003cdiv class=\"e_richText-73 s_title clearfix\"\u003e\n\u003cdiv\u003e\n\u003cp\u003e\u003cimg id=\"1599654920273166336\" src=\"https:\/\/omo-oss-image.thefastimg.com\/portal-saas\/new2022072923460240318\/cms\/image\/660ccbbc-031c-42dc-8384-70df577a5c57.jpg\" alt=\"长友气体\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cstrong\u003eM31     |     Sharpstar 150 F2.8\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cimg id=\"1599654920566767616\" src=\"https:\/\/omo-oss-image.thefastimg.com\/portal-saas\/new2022072923460240318\/cms\/image\/581437bb-9042-4369-bc28-a4288759a1b6.jpg\" alt=\"长友气体\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cstrong\u003eM45     |     Sharpstar 150 F2.8\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"Sharpstar","offers":[{"title":"Default Title","offer_id":55280293609848,"sku":"15028HNT","price":2119.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0523\/1650\/4241\/files\/15028-HNTfrontsideview.png?v=1782290286"},{"product_id":"sca310-310mm-f3-8-cassegrain-astrograph","title":"Sharpstar SCA310 310mm f\/3.8 Super Cassegrain Astrograph","description":"\u003cdiv id=\"saf-detail-0\" class=\"cbox-57 p_loopItem\"\u003e\n\u003cp style=\"font-size: 0.875rem; margin-bottom: 0.75em;\"\u003eThe Sharpstar SCA310 is a 310mm large-aperture f\/3.8 Super Cassegrain astrograph designed for serious deep-sky astrophotography. Its ultra-fast focal ratio and precision parabolic primary mirror deliver exceptional light-gathering power with sharp, round stars across the entire field.\u003c\/p\u003e\n\u003cp style=\"margin-top: 0; margin-bottom: 0.75em;\"\u003eAn integrated 3-inch triplet corrector with ED glass produces a flat, well-corrected image circle suitable for full-frame and medium-format sensors. The carbon-fibre tube ensures excellent thermal stability during long imaging sessions, making the SCA310 ideal for high-resolution, high-efficiency imaging of faint nebulae and galaxies.\u003c\/p\u003e\n\u003ch2\u003eUltra-Fast f\/3.8 Optical Design for Deep-Sky Imaging\u003c\/h2\u003e\n\u003cfigure\u003e\u003cimg alt=\"SCA310 f\/3.8 Cassegrain astrograph displayed on a presentation stand\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0523\/1650\/4241\/files\/sca310-astrograph-hero-presentation.jpg?v=1766994656\"\u003e\u003c\/figure\u003e\n\u003cp\u003eWith a 310mm aperture and fast f\/3.8 focal ratio, the SCA310 enables significantly shorter exposure times while revealing fine detail and vivid colour in faint deep-sky targets.\u003c\/p\u003e\n\u003cp\u003eThe high-precision parabolic primary mirror eliminates spherical aberration, delivering sharp, round star points across the field. A fused-silica spherical secondary mirror offers excellent thermal stability, folding a long optical path into a compact, rigid tube.\u003c\/p\u003e\n\u003cp\u003eEnhanced aluminium mirror coatings provide over 95% reflectivity, maximising light throughput and imaging efficiency.\u003c\/p\u003e\n\u003cfigure\u003e\u003cimg alt=\"Primary and secondary mirror system of the SCA310 astrograph with enhanced aluminium coatings\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0523\/1650\/4241\/files\/sca310-primary-and-secondary-mirrors.jpg?v=1766994759\"\u003e\u003c\/figure\u003e\n\u003cp\u003eA rear-mounted 3-inch triplet coma corrector incorporating ED glass delivers a flat, well-corrected field from centre to edge, fully supporting full-frame and medium-format sensors with near 100% illumination.\u003c\/p\u003e\n\u003cp\u003eThe optical design requires no additional back-focus calculations, enabling fast and straightforward setup and focusing.\u003c\/p\u003e\n\u003cfigure\u003e\u003cimg alt=\"Carbon fibre optical tube of the SCA310 f\/3.8 Cassegrain astrograph\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0523\/1650\/4241\/files\/sca310-carbon-fibre-optical-tube.jpg?v=1766994510\"\u003e\u003c\/figure\u003e\n\u003cp\u003eA hollow carry handle and multi-slot mounting system allow flexible accessory attachment. The supplied 405mm Losmandy-style dovetail ensures secure compatibility with mainstream equatorial mounts.\u003c\/p\u003e\n\u003cfigure\u003e\u003cimg alt=\"Multi-function hollow handle bar and Losmandy-style dovetail plate on the SCA310 astrograph\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0523\/1650\/4241\/files\/sca310-hollow-handle-and-losmandy-dovetail.jpg?v=1766994605\"\u003e\u003c\/figure\u003e\n\u003cp\u003eThe 3.5-inch high-rigidity rack-and-pinion focuser provides 28mm of travel with a 1:10 dual-speed fine adjustment. A front-mounted 360° rotator prevents cable wrap during imaging.\u003c\/p\u003e\n\u003cp\u003eRear adapters (M68 \/ M54 \/ M48) ensure wide compatibility. The M48 adapter includes an integrated 2-inch filter thread for direct filter installation.\u003c\/p\u003e\n\u003cfigure\u003e\u003cimg alt=\"3.5 inch rack and pinion focuser with fine adjustment on the SCA310 astrograph\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0523\/1650\/4241\/files\/sca310-3-5-inch-rack-and-pinion-focuser.jpg?v=1766994711\"\u003e\u003c\/figure\u003e\n\u003cp\u003eThree rear-mounted cooling fans accelerate thermal equilibrium of the primary mirror, improving image stability and overall observing efficiency.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003ch2\u003eHow the SCA310 Compares to Other Astrograph Designs\u003c\/h2\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eDesign\u003c\/th\u003e\n\u003cth\u003eTypical Characteristics\u003c\/th\u003e\n\u003cth\u003eHow the SCA310 Differs\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth\u003eRitchey–Chrétien (RC)\u003c\/th\u003e\n\u003ctd\u003eSlower focal ratios (typically f\/8), large central obstruction, often requires additional flatteners or reducers for imaging.\u003c\/td\u003e\n\u003ctd\u003eThe SCA310 operates natively at f\/3.8 with an integrated ED triplet corrector, delivering a wider, flatter field and dramatically shorter exposure times without extra optics.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eCorrected Dall–Kirkham (CDK)\u003c\/th\u003e\n\u003ctd\u003eExcellent optical correction but generally larger, heavier, and significantly more expensive systems.\u003c\/td\u003e\n\u003ctd\u003eThe SCA310 achieves high-level correction in a more compact and accessible package, optimised specifically for modern deep-sky imaging sensors.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eSharpstar SCA310\u003c\/th\u003e\n\u003ctd\u003eNative f\/3.8 system with integrated ED corrector, carbon-fibre tube, active cooling, and full-frame to medium-format support.\u003c\/td\u003e\n\u003ctd\u003ePurpose-built for efficient, high-resolution astrophotography with minimal setup complexity and maximum imaging productivity.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cdiv id=\"saf-detail-1\" class=\"cbox-57 p_loopItem\"\u003e\n\u003ch2\u003eSpecifications\u003c\/h2\u003e\n\u003ctable\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth\u003eAperture\u003c\/th\u003e\n\u003ctd\u003e310mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eFocal Length \/ Ratio\u003c\/th\u003e\n\u003ctd\u003e1178mm \/ f\/3.8\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003ePrimary Mirror\u003c\/th\u003e\n\u003ctd\u003eAspherical\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003ePrimary Mirror Material\u003c\/th\u003e\n\u003ctd\u003ePyrex-equivalent glass\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eSecondary Mirror\u003c\/th\u003e\n\u003ctd\u003eFused silica glass\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eImage Circle\u003c\/th\u003e\n\u003ctd\u003eMedium format (55mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eTube Material\u003c\/th\u003e\n\u003ctd\u003eCarbon fibre\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eCorrector\u003c\/th\u003e\n\u003ctd\u003eTriplet (1× ED glass)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eSecondary Diameter\u003c\/th\u003e\n\u003ctd\u003e184mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eTube Length\u003c\/th\u003e\n\u003ctd\u003e721mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eTube Diameter\u003c\/th\u003e\n\u003ctd\u003e378mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eWeight\u003c\/th\u003e\n\u003ctd\u003e23.5kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eRear Threads\u003c\/th\u003e\n\u003ctd\u003eM68 \/ M54 \/ M48 (M48 includes filter thread)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eBack Focus\u003c\/th\u003e\n\u003ctd\u003e38–66mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch2\u003eProduct Size Diagram\u003c\/h2\u003e\n\u003cfigure\u003e\u003cimg alt=\"Mechanical dimensions and technical drawings of the SCA310 Cassegrain astrograph\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0523\/1650\/4241\/files\/sca310-mechanical-dimensions-drawing.webp?v=1766994856\"\u003e\u003c\/figure\u003e\n\u003ch2\u003eOptical Path Diagram\u003c\/h2\u003e\n\u003cfigure\u003e\u003cimg alt=\"Optical design diagram of the SCA310 f\/3.8 Cassegrain astrograph showing ray paths and ED corrector element\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0523\/1650\/4241\/files\/sca310-optical-design-diagram.webp?v=1766994808\"\u003e\u003c\/figure\u003e\n\u003ch2\u003eRelative Illumination\u003c\/h2\u003e\n\u003cfigure\u003e\u003cimg alt=\"Vignetting diagram showing field illumination of the SCA310 f\/3.8 Cassegrain astrograph\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0523\/1650\/4241\/files\/sca310-vignetting-diagram.webp?v=1766995002\"\u003e\u003c\/figure\u003e\n\u003cfigure\u003e\u003cimg alt=\"Vignetting diagram showing wide-field illumination performance of the SCA310 f\/3.8 Cassegrain astrograph\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0523\/1650\/4241\/files\/sca310-vignetting-diagram-full-frame.webp?v=1766995051\"\u003e\u003c\/figure\u003e\n\u003ch2\u003eSpot Diagram\u003c\/h2\u003e\n\u003cfigure\u003e\u003cimg alt=\"Spot diagram showing optical performance of the SCA310 f\/3.8 Cassegrain astrograph across the image field\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0523\/1650\/4241\/files\/sca310-spot-diagram-optical-performance.webp?v=1766994908\"\u003e\u003c\/figure\u003e\n\u003c\/div\u003e","brand":"Sharpstar","offers":[{"title":"Default Title","offer_id":55402829283704,"sku":"SCA310","price":7995.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0523\/1650\/4241\/files\/sca310-astrograph-new-product-badge.webp?v=1766995099"}],"url":"https:\/\/www.darkclearskies.co.uk\/collections\/featured-sharpstar-equipment.oembed","provider":"Dark Clear Skies ","version":"1.0","type":"link"}