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  1. proudpapa56

    Spreadsheet for calculating distance to the bird

    Thanks again. That actually puts things in better perspective in my head. My brain was trying to compare apples to oranges when it should have been apples to grapefruits.
  2. proudpapa56

    Spreadsheet for calculating distance to the bird

    35 mm equivalent Was looking at your 35mm equivalent tele length calc and would like to know if I've got this right for my set-up. 30 (Swaro STX/95 mag) x 30 (TLS-APO focal length) x 2.7 (Nikon V3 crop factor) = 2430 35mm equivalent If that's correct, it's quite a bit more than I thought. Thanks
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