Had one those Ah-HAA moments the other day. I'm sure I'm not the first to see this but maybe resurrecting's it might help someone. I had been changing some sights around and I added a Lyman 57 SML peep sight to my
.50 Deerstalker. I had folded down the rear sight to make it easier to install the peep. I made a pretty good estimate of where the new sight needed to be and as i was lining sights up I popped the rear sight back up . Not only was my rough guess pretty close but lo and behold when looking thru the peep my rear sight is now much sharper but i now have a three point sight. It's no secret that adding any kind of aperture in the sight plane adds depth of focus but every time it's experienced it's a revelation to us with old eyes. I can't wait until the weather turns so I can see the results .