I have a telephoto lens but sometimes I just don't feel like lugging it around on my lens, I'm looking for a standard zoom with a good and fast AF motor, I'm thinking of the 24-105 since I've heard its fast but what else is? I'd go for the 24-70 but its too far out of my price range, I'm looking to spend $650 max, used only, I cant afford a new one, any suggestions? thanks




