• 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. Richard D

    Maths help!

    That simple :-) Thanks
  2. Richard D

    Maths help!

    Somehow I scraped a C at O Level maths, honest... If I've got the angle of view at the actual Field of View at 1000m how do I calculate the FOV at 10m?
Back
Top