• <object id="oyun9"></object>

    <td id="oyun9"><option id="oyun9"></option></td>
      <object id="oyun9"><form id="oyun9"></form></object>
      <pre id="oyun9"></pre>
      <td id="oyun9"><strike id="oyun9"><ol id="oyun9"></ol></strike></td>
      <table id="oyun9"></table>
    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" 76EDPH f/4.5 full-frame reducer is dedicated for Sharpstar 76EDPH astrograph. At one end of the reducer, there is M74×1 thread, tapped for the connection to the 76EDPH’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 three-element air-spaced lens structure, supporting full-frame imaging, effectively controlling unwanted vignette. The practical focal ratio of the Sharpstar 76EDPH when used with this reducer is f/4.5, and the focal length can be shortened to 342mm. 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 76EDPH
      Focal ratio:f/4.5
      Image circle:44mm
      Lens:three-element air-spaced structure
      Outer diameter:88mm
      Back focus:55mm
      Length:77mm(including the M48 thread)
      Coating:full-surface multi-layer coating
      Weight:0.5kg










      国产无遮挡又爽又刺激的视频