• 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. M

    best bins ?

    The latest coatings reduce the amount of light loss on the reflecting surface (mirror) of the prism. Perhaps Henry it should be added that the figures you gave earlier of 85%-90% is the total light transmission through the entire binocular, and not just through the prism system. This takes...
  2. M

    best bins ?

    Henry. How many people know or are interested in the different types of roof prism which is the generic name. The advantage of the Abbe Koenig roof prism against the Pechan / Schmidt is noticeable at dusk and dawn. The difference in daylight is minimal.
Back
Top