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Message: <blockquote data-quote="Steve C" data-source="post: 1557318" data-attributes="member: 56622">I doubt it is much of an issue with most normal viewing conditions.  I have never seen the phenomena described in what I would call normal viewing conditions.  I wondered about that quite a bit.  I read edz's last post on Cloudy Nights where he commented about reflection from the retaining ring on the objective and from light coming in from above the binocular.  When I was reading that post, I had a thought.  I use Bushwacker flip up objective covers on both my Promaster and ZEN ED binoculars.  This creates a bit of an extension, sort of like a sunshade, which may block the light edz talked about coming from above the binocular. So maybe that is why I do not see this, and it might be a potential easy fix for those who are bothered by this.  Those standard objectives need to be replaced anyway as the do not stay on worth a hoot.However there is still something I have not grasped quite yet.  If I take the Bushwhackers off, then I can see the effect that has been described,but ONLY if I place my head at angles which I normally would not use.  I actually need a pretty grotesque off angle posture that would kink Paul Bunyan's neck.  Almost like looking through the bottom half of the binocular EP with the top half of my pupil.  So I don't yet readily see why this is not at least partially eye position related.</blockquote>