• 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. Kevin Purcell

    Vortex Doubler. Does it?, and how well?

    So long as your dominant eye doesn't have bad astigmatism ... otherwise that rather negates using the doubler (if you loose half your acuity without your glasses).
  2. Kevin Purcell

    Vortex Doubler. Does it?, and how well?

    Well all 20x magnification 42mm bins are going to have a 2mm exit pupil. And a 20x needs to be on a monopod or tripod or seriously braced. Or you have to assume and interesting position (prone with elbows on the ground or on a rock or a tree). I think they way to consider it is the trade off...
  3. Kevin Purcell

    Vortex Doubler. Does it?, and how well?

    Search for the Bushnell Doubler comments too on this forum. Most users seem to like that one.
Back
Top