used or refirbished?
i'm thinking of buying it for $640 from a guy on kijiji. $640 may not be a fortune, but its alot for me. when I meet the guy, i'm going to put the lense on my camera and take a few pictures and i'm sure I will be able to see them on the LCD screen otherwise i doubt the guy would sell the lense and think he'd get away with it. but i'm thinking is it possible that a lens appears to working fine, but there could be a problem with it that an ameteur like me won't notice? for example something inside got moved slightly and now the focus is just a bit off? my pictures will not be as sharp as it should be with this lense? does that happen? or maybe the USM isn't as fast as it should be for whatever reason? something like that.
Canon EF-S 18-55mm f/3.5-5.6 IS
Canon EF-S 55-250mm f/4-5.6 IS
Canon EF-S 50mm f/1.8