Hen Run,
Changing the subject, re this, also from #76, "If you have knowledge on how to avoid glare flare up, please share it......."
I can share with you what I have done to deal with the glare Im seeing in my NLs. First some context, I have birded in the same places approximately 3 days a week for several years, during the winter waterfowl, shore bird, and raptor migration. It is always out over water or salt marsh, close to mid day with the sun usually high and bright. Distances can be shortish, and/but are often long. A scope has proven its obvious value when things get into multiple hundreds of yards. I first saw glare... indeed I mean just that, the first time I ever saw any glare, was a couple months back using the new NLs in the same conditions described above. We were peering at a Burrowing Owl about 50 yards away, partially out of its burrow. The sun was high and just behind the bird. My expectation was the bird would be back lit, blacked out, and there wouldn't be much to see. Instead I saw a set of yellow concentric parallal arcs emanating from about 5 o'clock within the field of view. I moved, both the binos and me. I played with the eyecups, (I wear glasses and eyecups are usually fully retracted). Nadda zip. It was still there.
Having read here of the various suggested solutions I tried them all, to no avail. So the old dog part. For 50 years Ive used binos in approximately the same way. I spot the target, keep my eye on it, bring the binos to my face and touch the upper rubber rim of the eyecup to the junction of my eyeglass frame and eye brow. That habit enables me to find the targeted bird, irregardless of FOV. What I had not noticed though was the angle between the bino eyecup and my eyeglass lens. In my case Ive developed a postural habit that makes these not parallel. The binos are tipped away, wider at the bottom of the eyecup, touching at the top. Making sure my head was more erect (terrain allowing), pulling the eyecups onto my eyeglass lens, began to make a difference... Not perfect but better.
Too, I stopped looking for glare. I get that sounds weird. I went back to looking for birds as I normally do and stopped experimenting with the sun and seeing how close I could move binos towards it and detecting the onset of glare. Better.
Most recently, (note weeks into it), I discovered if I abandon my habit of mounting the binos to my eyebrow, but rather slide the eyecup rubber ring down 1/4" - 3/8" or so onto the eyeglass lens, the glare disappears. Curious, (and its too soon to be too sure), I have come to notice that my old school conventional bifocal lens interacted with the view, if I look down within the bino's FOV - something i rarely do, with that old way of mounting bins to face. By sliding the eyecups down as described above the bifocal distortion of the FOV disappears. I now wonder if some of the glare experienced comes from the edge of that bifocal lens and by removing it from the FOV, glare is mitigated? The experiment continues.
Point here is the solution to this often reported issue may be more subtle, more personal that what we read here. There is a saying, "Its the poor athlete who blames his/her equipment." Just sayin.
