Tabazan, one thing to keep in mind is that when someone encounters a problem, they tend to ask on forums and complain everywhere, but when they don't encounter problems they surely will not put that on the internet(at least most of the time).


That's how horror-story's start...I say don't worry to much unless you're buying 2nd hand, or when quality sites as this one or dpreview announce "official" bugs and don't recommend the lens you want to buy.


With 2nd hand you don't (at least most of the time) get a chance to either get your money back or trade a lemon for a good lens. So always try them out properly[]