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  1. janvangastel

    Spreadsheet for calculating distance to the bird

    Yes, that's right.
  2. janvangastel

    Spreadsheet for calculating distance to the bird

    Now that the Digiscope calculator website is down for some time already, I have made a spreadsheet to calculate the distance to the bird, from the photograph. If you are interested, it can be downloaded from this page, bottom, left side.
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