{"product_id":"sharpstar-130mm-f-2-8-hnt-hyperbolic-newtonian-astrograph-13028hnt","title":"SharpStar NEW 130mm f\/2.8 HNT-AL Hyperbolic Newtonian Astrograph (13028HNT-AL)","description":"\u003ch2\u003eSharpStar NEW 130mm f\/2.8 HNT-AL Hyperbolic Newtonian Astrograph\u003c\/h2\u003e\n\u003cdiv class=\"e_container-3 s_layout response-transition\"\u003e\n\u003cdiv class=\"cbox-3-1 p_item\"\u003e\n\u003cp class=\"e_text-8 s_title\"\u003eHyperbolic Newtonian reflector with 130mm aperture and a very fast F2.8 focal ratio. Aluminum tube version.\u003c\/p\u003e\n\u003cp class=\"e_text-8 s_title\"\u003e\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/Untitled_6f99485a-3355-4995-b57f-3178b78db3df.webp?v=1733333802\" width=\"1070\" height=\"756\"\u003e\u003c\/p\u003e\n\u003ca href=\"https:\/\/www.sharpstar-optics.com\/Contact.html#c_form_059-1666352670871\" class=\"e_button-50 s_button1 btn btn-primary response-transition\" target=\"_blank\"\u003e\u003cspan\u003e\u003c\/span\u003e\u003c\/a\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cp\u003e\u003cspan\u003eThe 13028HNT-AL is a hyperbolic Newtonian reflector with a 130mm aperture and a fast F2.8 focal ratio.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e13028HNT-AL supports a 44mm full-frame image circle, and the star performance is great.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eThe primary mirror is made of Pyrex-alike glass PZ33. The thermal expansion coefficient is smaller than ordinary glass. The dielectric multilayer coating gives the primary mirror a highly reflective ability of up to 97%. The minor axis of the secondary mirror is 65mm, enabling sufficient illumination for full-frame imaging.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eThe corrector in the focuser adopts a doublet lens design, one of which is an ED glass, enhancing the power in aberration correction.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg height=\"742\" width=\"1049\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/Untitled_2fb49eff-8622-44b4-9c7e-6072066f36f2.webp?v=1733333932\" alt=\"\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e13028HNT-AL further enhances the structure stability of the optical axis of the primary mirror, and there are three sets of adjustment screws at the bottom of the lens tube for adjusting the angle of the primary mirror.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e13028HNT-AL improves the bracket structure of the secondary mirror to make it more stable. The secondary mirror bracket is CNC machined， integrated manufacturing with no misalignment, which ensures beautiful diffraction spikes during astrophotography.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eThere is a finder base on the side of the lens tube, which provides additional mounting positions for finder scope or other astronomical accessories.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e13028HNT-AL ‘s tube ring is a hollow design, sturdy and durable. Enlarged hand screws allow users to open and close the tube ring without additional tools.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e13028HNT-AL's focuser is a dual-speed rack-and-pinion large rigid focuser, which ensures a 2cm focusing travel as much as possible within the structural limitations and can be compatible with most motorized focusers.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg height=\"708\" width=\"1002\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/Untitled_e9a01a92-eeb6-42ff-a82c-0761f51bbd94.webp?v=1733334023\" alt=\"\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eThe focuser is designed with an enlarged handwheel, integrated camera rotator and locking screw, and a built-in doublet corrector. The structure of the focuser is very stable and can carry 3kg.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eThe back focus of 13028HNT-AL is standard 55mm (from the M48 thread).\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eStandard Vixen-style 290mm dovetail plate.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e13028HNT-AL is all-metal, with an aluminum lens tube and CNC machined parts.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e* The 13028HNT-AL focuser and rotator are shipped in a locked condition. Users should be sure to loosen the locking screws before initial use to avoid damage to the part.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cimg height=\"713\" width=\"1008\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/Untitled_908bf7c1-907f-4194-a5b6-c9d1c2eaca80.webp?v=1733334114\" alt=\"\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/Untitled_d213c9d2-922a-4efb-854f-b0ed9a6fb4d7.webp?v=1733334437\" width=\"1130\" height=\"799\"\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cdiv\u003e\n\u003ch3\u003eTechnical Specifications\u003cbr\u003e\n\u003c\/h3\u003e\n\u003ctable width=\"84.20%\" cellspacing=\"0\" align=\"center\"\u003e\n\u003ctbody\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\u003e130mm\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\u003e364mm\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\/2.8\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\u003eHyperbolic reflective mirror\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 material\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd colspan=\"2\"\u003e\n\u003cp\u003e\u003cstrong\u003ePZ33（similar to Pyrex 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\u003eCorrector\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd colspan=\"2\"\u003e\n\u003cp\u003e\u003cstrong\u003eTwo-element air-spaced refractive lenses（including one 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\u003eMinor axis of secondary mirror\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd colspan=\"2\"\u003e\n\u003cp\u003e\u003cstrong\u003e65mm\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp\u003e\u003cstrong\u003eImage 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\u003eField of view\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd colspan=\"2\"\u003e\n\u003cp\u003e\u003cstrong\u003e6.9 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\u003eAluminum\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\u003e174mm\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\u003e400mm\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp\u003e\u003cstrong\u003eOTA weight\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd colspan=\"2\"\u003e\n\u003cp\u003e\u003cstrong\u003e3.8kg\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（including tube ring and dovetail plate）\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd colspan=\"2\"\u003e\n\u003cp\u003e\u003cstrong\u003e4.8kg\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\u003e0.89 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\u003eLimiting visual magnitude\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd colspan=\"2\"\u003e\n\u003cp\u003e\u003cstrong\u003e12.3\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\u003ch3 data-mce-fragment=\"1\"\u003e\u003cbr\u003e\u003c\/h3\u003e\n\u003ch3 data-mce-fragment=\"1\"\u003e\u003cimg height=\"2476\" width=\"1481\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/Untitssled.webp?v=1733334546\" alt=\"\"\u003e\u003c\/h3\u003e\n\u003ch3 data-mce-fragment=\"1\"\u003e\u003cbr\u003e\u003c\/h3\u003e\n\u003ch3 data-mce-fragment=\"1\"\u003e\u003cbr\u003e\u003c\/h3\u003e\n\u003ch3 data-mce-fragment=\"1\"\u003e\u003cbr\u003e\u003c\/h3\u003e\n\u003ch3 data-mce-fragment=\"1\"\u003eIn the Box\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eSharpStar 130mm f\/2.8 HNT-AL Hyperbolic Newtonian Astrograph\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eTube Rings with Integrated Handle\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eVixen-style 290mm Dovetail Plate\u003cbr\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cdiv data-mce-fragment=\"1\"\u003e\u003cbr data-mce-fragment=\"1\"\u003e\u003c\/div\u003e\n\u003ch3 data-mce-fragment=\"1\"\u003eWarranty \u0026amp; Manuals\u003c\/h3\u003e\n\u003cdiv data-mce-fragment=\"1\"\u003e\u003cbr data-mce-fragment=\"1\"\u003e\u003c\/div\u003e\n\u003cdiv data-mce-fragment=\"1\"\u003eSharpStar Warranty\u003c\/div\u003e\n\u003c\/div\u003e","brand":"SharpStar","offers":[{"title":"Default Title","offer_id":43628368724197,"sku":"SS-1308HNT-AL","price":2302.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/4_d977acf9-55f6-48da-aa3f-8267bfefdede.webp?v=1777047643","url":"https:\/\/istronomyplus.com\/products\/sharpstar-130mm-f-2-8-hnt-hyperbolic-newtonian-astrograph-13028hnt","provider":"Astronomy Plus – Telescopes \u0026 Astrophotography Canada","version":"1.0","type":"link"}