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    1. Jiaxing Rui Xing Optical Instrument Co., Ltd 簡體中文版   English
      You are here: Home >>  Product >>  Accessories >>  Newtonian Coma Corrector >>  View Details
      全國熱線0573-82331687
      Newtonian reflector is one of the most sought-after astrographs among astronomy enthusiasts because it’s relatively easy to understand and operate, suitable for most amateurs. There is no sophisticated demand for a Newtonian reflector in visual observation, but when it comes to astrophotograph, a well-functioning Newtonian reflective system must be applied with a proper coma corrector.
       
      Sharpstar 30085NTRD coma corrector is destined to heal the above situation. This 3" 0.85× coma corrector allows full-frame imaging, effectively producing stunning deep-sky pictures.
       
      Sharpstar 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.
       
      The star will obviously be enhanced with the help of Sharpstar 30085NTRD coma corrector, and other aberrations will also be effectively reduced. It’s an indispensable component in a Newtonian reflective system.
       
      Application:200-800mm, f/3-f/6 parabolic reflector
      Reduction factor:0.85×
      Image circle:44mm
      Lens:quadruplet
      Outer diameter:75mm
      Back-focus:55mm(starting from the M54 female thread [camera end])
      Length:119.8mm
      Coating:full-surface multi-layer coatings
      Weight:0.85kg



      Performance of 30085NTRD in Newtonian reflector(D200 F3.5)

      Performance of 30085NTRD in Newtonian reflector(D200 F4)

      Performance of 30085NTRD in Newtonian reflector(D200 F5)

      Performance of 30085NTRD in Newtonian reflector(D300 F3.5)

      Performance of 30085NTRD in Newtonian reflector(D300 F4)

      Performance of 30085NTRD in Newtonian reflector(D300 F5)

      Optical path diagram of 30085NTRD


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