Sharpstar 2" Triplet 0.95x Reducer / Coma Corrector for f/3-f/6 Newtonian Reflectors with M48 ThreadSharpstar 2" 0.95× coma corrector can be applied to most marketable Newtonian reflective astrographs. It’s of high quality and easy to use. Sharpstar 2" 0.95× coma corrector is designed for APS-C imaging circles(28mm), suitable for Newtonian reflectors with focal ratio between f/3 and f/6, and aperture size from 150mm to 600mm. The reduction factor is 0.95×, thus it can reduce the original f/4, f/5 and f/6 respectively to f/3.8, f/4.75 and f/5.7, effectively shortening the exposure time. Besides, it can improve the star shapes. The diameter of stars in the center of the field can be limited within 10um. |
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Sharpstar 2" Quaduplet 1x MPCC Coma Corrector for f/3-f/6 Newtonian Reflectors with M48 ThreadFollowing the advent of 0.95x coma corrector for Newtonian reflector, SHARPSTAR optics has well received the favor of customers with high praise. A new 1x full-frame coma corrector is now available to meet the needs of different market segments. Optimized for the aberration correction, it adopts a new Quadruplet air-spaced design, which includes an extra-low dispersion lens, same as the 0.95x, it features 2" with 55mm focal length, which is very convenient and simple to connect your imaging equipment. |
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Sharpstar 3" Quadruplet 0.85x Reducer / Coma Corrector for f/3-f/6 Newtonian ReflectorsSharpstar 30085NTRD coma corrector can shorten the original focal ratio of f/4 to f/3.4, greatly shortening the exposure time. Besides, the Sharpstar 30085NTRD coma corrector is considerately designed with many threads. At the front of the corrector, there is M82×1 male thread for the connection to our 3" focuser. At the back of the corrector, there is tapped with M76×1 male thread, M68×1 female thread and M54×0.75 female thread, which can be used to thread on our M54 to M48 camera adapter ring. The back-focus is standard 55mm, starting from the M54 thread(camera end) to focal plane. |
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กล้องดูดาว Sharpstar 130mm f/2.8 HNT Hyperbolic Newtonian Astrograph, สีแดง #13028HNT
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กล้องดูดาว Sharpstar 150mm f/2.8 HNT-AL Hyperbolic Newtonian Astrograph #15028HNT-AL - สีแดง
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กล้องดูดาว Sharpstar 150mm f/2.8 HNT Hyperbolic Newtonian Astrograph #15028HNT - สีแดง
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กล้องดูดาว Sharpstar SCA260 v.2 260mm f/5 Super Ashperical Cassegrain Astrograph with Integrated Field Flattener & Carbon Fiber Tube Ver2.1 (ฟอกัสเซอร์หมุนได้)The Sharpstar SCA260 is a fast focal ratio Cassegrain astrograph for serious astrophotographers that delivers superb images at an affordable price. With an aspherical f/5 primary mirror of 260mm aperture, the SCA260 includes an integrated three-element air-spaced corrector that produces a huge 80mm image circle. With a full-frame camera, the 1300mm focal length of the SCA260 delivers a big 1.5o x 1.0o field of view that’s flat and well corrected right to the edge. Note: Version 2.1 improves on the v2.0 by having the rotator between the telescope and focuser (therefore focuser can also be rotated). Pictures below mostly shows v2.0 but new orders will receive the latest 2.1 version. |
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