please share some of your lens horror stories, which ones you totally regret buying, produce the worst results etc. mine would have to be the canon ef 28mm f1.8 lens. i thought it would be ideal for a crop body and the couple of reviews online seemed positive, but when i special ordered it, it was just awful. it had every problem in the book, all my photos were low-contrast and seemed to "bloom" just a little to make everything look soft-focus (but if i wanted that effect, i'd do it myself in photoshop, thanks). by FAR its worst flaw was fringing. if i took a shot of my blinds, there'd be about five pixels of purple fringing at every high-contrast edge. maybe i got a bad copy, but i wouldn't expect canon to drop the ball in every possible way? i hate when people suggest i stop down to alleviate these problems because, frankly, for a nearly $700 lens (in canada..) i expect it to perform decently wide-open. as a point of comparison, my $100 50mm f1.8 lens has virtually NO fringing and is sharp enough wide open. i would definitely not recommend this lens- stay away.