That's a great question! Most folks that do not wear eyeglasses will run them out either all the way or not quite all the way, but this really depends on face structure and how you hold the binoculars to your eyes. If you run the eyecups right under your brow and have them resting on your face you will need the eyecups ran out in order to get the proper eye relief. If you tend to hold the binoculars a little further away from your face you may find keeping the eyecups all the way in or close to all the way in is better. At the end of the day, it's really finding what works for you!Just curious what your preference is.
I don't wear glasses, but have always felt that having the eyecups all the way down was more comfortable when I'm glassing.
Haha - I've had the same thing happen.I love looking at new binos in the store and the sales rep will twist the cups all the way up and then hand them to me; I then twist them all the way back down to look through them. lol
X2On my field glasses I run the cups all the way out........ On my 15X56's there all the way in setting on a tripod.