I have seen this term popping up recently. I am wondering whether we are all describing the same thing.
For me, I noticed some binoculars I tried in store have extra long eye relief while the eyecup extension is not matching to that ER. As a result, I see blackout if I push my eyes against the eyecups. It goes away if I move slightly away from eyecups. Not sure if you have similar experience? Let's share and hear it.
For me, I noticed some binoculars I tried in store have extra long eye relief while the eyecup extension is not matching to that ER. As a result, I see blackout if I push my eyes against the eyecups. It goes away if I move slightly away from eyecups. Not sure if you have similar experience? Let's share and hear it.