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Homework Help: Keplerian telescope

  1. Apr 3, 2006 #1
    i am to design a keplerian telescope with 7X magnification, 5mm exit pupil, and at least 10mm eye relief.

    I have one lens with focal length 35mm, another with focal length 5mm, giving a visual mag of 7X and the exit puiple is 5mm, but how do I account for the 10mm eye relief?
  2. jcsd
  3. Apr 4, 2006 #2
    basically, the thing I dont understand is how do I calcuate eye relief for an afocal system?
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