Hi, I'm interest to know what difference of lens?
I mean the terms, than ED, A-EF, EF, USM, VR (this I know), AF, Telephoto, etc... 
WHAT ALL THIS????? 
when I can fined some info about what this means, and what difrence between all tipes of this speciphics of leans?
this crazed me..... :-D

Thanks, AlexSM.