This is in no way an ultra wide angle lens, my EFS 18-135mm lens that came with my 7d out performs it. I should have expected as much with an L series lens that wasn't a million $. the internal zoom is nice though and the action is as smooth as silk. I am returning it and getting the EF-s 10-22mm f/3.5-4.5 that I was replacing because it was stolen.