I just got a new pair of Sidewinders and was reading the instruction manual, it says to twist the eye cups up if you don't wear glasses and down if you do. Well I don't wear glasses and it seems like I can see much better with the eye cups down. Are the instructions wrong? Just curious. This is the first pair of binos I've had with twist up and down eye cups. Anyhoo, the glass in these things is AWSOME!!!!! When I first got them yesterday I walked out on my front portch to checkim' out, Man , I could see a single spiderweb strand blowing off my mailbox 60yrds away, needless to say, I'm very impressed. Thanks to all who recommended them, AT is great.