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    1. Jiaxing Rui Xing Optical Instrument Co., Ltd 簡體中文版   English
      You are here: Home >>  Product >>  Accessories >>  Refraction focal reducer >>  View Details
      全國熱線0573-82331687
      The 2.5" 94EDPH f/4.4 full-frame reducer is dedicated for Sharpstar 94EDPH astrograph. At one end of the reducer, there is M74×1 thread, tapped for the connection to the 94EDPH’s reducer and at the other end the reducer, there is M48×0.75 thread for the connection of most stock cameras. The back focus is 55mm after the attachment of a camera.

      The reducer is designed with a four-element air-spaced lens structure, supporting full-frame imaging and the image circle reaches 50mm, effectively controlling unwanted vignette. The practical focal ratio of the Sharpstar 94EDPH when used with this reducer is f/4.4, and the focal length can be shortened to 414mm. It’s preferred by many deep-sky astrophotographers.
       
      Another improvement is that the f/4.4 reducer is also designed with a 360-degree rotator, which is of great convenience for composition when imaging the deep-sky objects. The above-mentioned M48 thread is suitable for the connection for standard 2" filters.
       
      Application:for 94EDPH
      Focal ratio:f/4.4
      Image circle:50mm
      Lens:four-element air-spaced structure
      Outer diameter:88mm
      Back focus:55mm
      Length:105mm
      Coating:full-surface multi-layer coatings
      Weight:0.67kg
       






      SHARPSTAR 94EDPH with F4.4 Quad Reducer
      ZWO 6200 full frame camera
      lum 120x60s, rgb each 20x180s
      Total 5hrs
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