I'm in the market for a new lens for my Canon 350D. I currently pack a 17-40L and the little 50. I'm obviously looking for something longer to complete a small set. I had a Sigma 70-300 for a couple years, but I never really liked it. I just sold it to my friend, and now I want a better replacement. I want something with a similar range, but variation on either end is no big deal (70-200 would be OK, so would a 50-500). My main concerns are that it takes good quality shots (not too much vignetting, purple fringing or CA), and doesn't break the bank. I don't want to spend much more than $500. It doesn't matter if it's used - in fact, used is probably better, since I'm more concerned with getting a quality piece of glass.
Anyone got any suggestions?
