I have used this lens for about five months now and shot several hundred pictures with it. It's used only on a 30D body. Some people have noticed barrel distortion and some pincushion issues with their lenses.
Build quality; Fast maximum aperture; which takes advantage of the finer 30D autofocus capabilities associated with f2.8 and faster lenses; Superior picture quality
Wish the short focal length was 15mm; Not dust sealed like the L lenses; Fits only digital Rebel; Rebel XT; Rebel XTi; 20D; 30D; and probably the upcoming 40D (or whatever they call it); Attracts a lot of attention; especially with the hood attached; Lens hood doesn't come with lens; is expensive (I...