• 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

  1. B

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

    The eyepiece determines the field. If the field stop is removed there is a blurry edge, which has limits and becomes fainter. There are small field, medium field, wide field, extra wide field and extreme widefield eyepieces. From say 15 degrees with a monocentric eyepiece to 120 degrees with...
Back
Top