• 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. E

    Dusk light performance relative to weight, NL Pure 10x32 vs 10x42

    The dimmer the light the more important for me to have higher magnification binoculars. I now use only 10x and 12x ones regardless of the size of the objectives which range from 25mm to 50mm. Part of subject identification depends on contrast and lower magnification means less contrast for the...
  2. E

    Dusk light performance relative to weight, NL Pure 10x32 vs 10x42

    It primarily comes down to the surface area of the objectives. A 42mm objective has a surface area that is 96% greater than a 30mm objective. A 50mm objective has a surface are that is 41% greater than a 42mm objective lens. For low light I use 7x50 (boat) and 12x50 binos. Having 50% greater...
Back
Top