Be very careful when buying this lens. It is as bad as some people say. This copy that I briefly owned had very soft corners, and low contrast at any aperture below F8. I am sure there are good copies out there, but if so many people are complaining about it, I think there is a design problem with this lens. Check it out before buying it. Best to bring your laptop and view the picture at 100% to make sure. This is probably the worse Canon lens that bears the L designation.