Both me and my dad bought these bino's. Really good glass. The problem is the eye cups. They will not extend out without unscrewing the entire eye cup out of the bino. Really cheap! I called Zeiss, and they sent me 2 sets of cups to try. Of those, I was able to match a pair that would extend. I have used these for three years now, and one side has gotten tight again. The plastic cup assembly has a detent that hangs up on itself somehow. If you get it set, dont move it. Believe me, this is top quality glass, but the eye cup problem is worthy of China made $50 dollar bino's, not $1000 dollar German made stuff. I have never been so frustrated with any other piece of hunting gear that I have ever owned, or borrowed. Jeff.