Had this lens when I had my 1DmII. When I went to the 5D it still covered the frame, but it’s IQ on FF wasn’t quite what I wanted. It was wonderfully wide, but a hair too much distortion for my tastes. I sold it for the 17-40mm L.
I get asked a lot of questions about this lens and I realized my only gallery for it was on the 5D. So I added another gallery with shots from this lens on my 1DmII for those interested: