• Welcome to BirdForum, the internet's largest birding community with thousands of members from all over the world. The forums are dedicated to wild birds, birding, binoculars and equipment and all that goes with it.

    Please register for an account to take part in the discussions in the forum, post your pictures in the gallery and more.
ZEISS DTI thermal imaging cameras. For more discoveries at night, and during the day.

Search results

thxpress_search_the_forum Search Opus
  1. has530

    What determines the field of view for the same magnification and objective lens?

    Yes I was just being lazy/careless when I said diameter. You could replace r with d/2 but it is easier to write as r (and diameter is the convention when talking about field stop width).
  2. has530

    What determines the field of view for the same magnification and objective lens?

    Whoops yes I edited it now. fo is the focal length of the objective.
  3. has530

    What determines the field of view for the same magnification and objective lens?

    There are two kinds of field of view, true and apparent (tFOV & aFOV). tFOV is what angle of the real world the binocular shows you while aFOV is how wide the image circle looks when you look through the binoculars. While there are some intricacies in converting between aFOV and tFOV (simple vs...
Back
Top