this lens to the tokina 12-24 f/4 or even the tokina 11-16 f/2.8 and sigma 10-20. people say those lenses are half the price with wider f/stops. people should realize that all other wide angle lenses are dx they are not full frame. this is the widest full frame zoom there is (as of date) it is wider than the beast 14-24 f/2.8 nikon by only 2mm s but at those angles even 2mm s matter