I did have an internal lens near the eyepiece of a Diamondback scope loosen up and rattle on me. This was a used scope that I purchased from an online dealer. Naturally it was fixed by Vortex quickly. I like the scope but if it happens again the scope will be repaired and then sold.

I also had a 2-7 Viper that worked perfectly that I just couldn't seem to like no matter how hard I tried. Just didn't care for the sight picture and field of view. Beautiful glass though. Hopefully the fella that bought it from me appreciates it more than I did.

Dan