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  1. C

    Blackouts?

    I read WJC's screenshot and thought I understood. Then I saw another poster say they had blackout problems with the NV but not the Ultravids. In other words, for that person, the model was relevant. That was confusing because I thought that it was the exit pupil size that matters.
  2. C

    Blackouts?

  3. C

    Blackouts?

    That's what I understood. However, some people say they get blackouts with one 8x42 binocular but not with a different model of 8x42. If that's correct, the size of the exit pupil is not related to blackouts but the size of the lens is. Have I got it straight now? Thanks.
  4. C

    Blackouts?

    I'm confused. That's not actually uncommon but perhaps I can get this one cleared up. Do all 8x42 binoculars have the same size exit pupil? Or does exit pupil refer to the diameter of the ocular lenses? I'm asking because it sounds like some 8x42 devices have trouble with blackouts from eye...
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