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  1. Troubador

    First binoculars: Nikon Vs Celestron

    Taken from Celestron Knowledge Base: https://www.celestron.com/blogs/knowledgebase/what-is-exit-pupil-and-eye-relief-for-sport-optics "Exit pupil size is calculated by dividing the objective lens size by the magnification power. For example: You want to know the exit pupil of an 8x42...
  2. Troubador

    First binoculars: Nikon Vs Celestron

    Gentlemen Personal comments have no place on Birdforum. Kindly calm down and treat each other with respect. Lee Moderator
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