Fun Lens
I bought this lens specifically for its Fish-Eye barrel effects for video. It's a very expensive lens for this single effect so if you're looking for a good wide-angle lens for a cropped sensor camera such as the Canon 7D, I highly recommend the Tokina 11-16mm f/2.8 AT-X 116 PRO DX, which is nearly...
Amazing wide-angle for Canon 7D or any other 1.6x crop sensor; Bought this for video work with my 7D and have used it many times, either for the fun fish-eye effect, or to show a 180 degree panorama.
Not sharp at the f/2.8 range in comparison to other Canon or Tokina lenses; Stopped up to the 4 range and you'll see a big difference but lose a lot of the low light capability that makes this lens appealing.