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Message: <blockquote data-quote="ronh" data-source="post: 1649446" data-attributes="member: 55514">Bob,It is unforgivable that most roof binos don't have an IPD scale. I guess it is a relic of military use, when the man on watch set his personal IPD and eyepiece settings, and was ready to go.  I have kluged up little doodads to fix the IPD on some of my binoculars, one less thing to worry about since my binos often get stuck into a pack and mashed around. Just a simple strip of rigid material or block or wood, crude but very carefully sized and shaped, and fixed to the hinge or body with a spot of glue, to limit the inward travel to my infinity IPD setting. Of course with these I can't compress them for the best closeup views, but I'm not in the habit of doing that anyway, and also my wife is punished with a one-eyed view. Perhaps my FL's resistance to CA makes it seem more tolerant of a sloppy IPD adjustment, consistent with Ron's idea, although inconsistent with the original post.I recommend the mirror view to everybody, not necessarily to set IPD, just for the "shock". Binoculars are indeed big eyes.RonH</blockquote>