{"product_id":"sharpstar-sca310-aspherical-cassegrain-astrograph","title":"Sharpstar SCA310 aspherical Cassegrain astrograph","description":"\u003cp\u003eAperture ：310mm (f\/3.8)\u003cbr\u003emedium format, 3\" three-element corrector, 3.5\" focuser\u003c\/p\u003e\n\u003cp class=\"e_text-102 s_title response-transition\"\u003eThe SCA310 is a 310mm large-aperture Cassegrain reflector. It features a fast f\/3.8 focal ratio, powerful light-gathering capability, and a wide imaging field, showing excellent performance for deep-sky astrophotography.\u003c\/p\u003e\n\u003cp class=\"e_text-102 s_title response-transition\"\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eWith a 310mm aperture and a fast f\/3.8 focal ratio, the SCA310 captures light with exceptional efficiency. This allows for significantly shorter exposure times and enhanced productivity in deep‑sky astrophotography, revealing fine details and vivid colors even in faint nebulae.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eThe SCA310 is a Cassegrain reflector whose primary mirror features a high-precision parabolic design. This aspheric mirror demands exceptional grinding and testing techniques to effectively eliminate spherical aberration, ensuring sharp, round star points.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eIts matching spherical secondary mirror is made from fused silica glass, offering outstanding thermal stability. Achieve long focal length optical path folding within a compact lens tube—delivering both high performance and excellent portability.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eThe primary and secondary mirrors are coated with enhanced aluminum, ensuring a reflectivity of over 95%, fully boosting the efficiency of light utilization.\u003c\/span\u003e\u003c\/p\u003e","brand":"Sharpstar","offers":[{"title":"Default Title","offer_id":49650968887555,"sku":"SCA310","price":7995.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1979\/5379\/files\/SCA310.jpg?v=1789761714","url":"https:\/\/milehighastro.com\/products\/sharpstar-sca310-aspherical-cassegrain-astrograph","provider":"Mile High Astronomy","version":"1.0","type":"link"}