• 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. U

    Blackouts and objective lens size - 30/32mm vs. 40/42mm

    I find that eyecups that don’t come out very far cause blackouts for me. Yesterday I did a modification with o rings to lengthen the eyecups on my Maven B3s just 2mm. It made all the difference in the world. You need a bino with eyecups that screw out to do this though. That feature makes it...