Quote Originally Posted by TakahiroW4047
From what I can tell and from the reviews from this site, the Canon 10-22mm has less distortion and despite the increase in price, definitely worth it in the long run.

The EF-S 10-22mm does very well in the distortion department - there is barrel distortion present, but it's relatively minor (and can often be worked around with composition). In the example onthe left (at 10mm) you can see a bit of distortion in the leaves at the upper left. In the example on the right (at 13mm) it's more evident because of the placement of the fountain.




EOS 7D, EF-S 10-22mm f/3.5-4.5 USM @ 10mm, 0.6 s, f/14, ISO 100 EOS 7D, EF-S 10-22mm f/3.5-4.5 USM @ 13mm, 1/500 s, f/8, ISO 100


The performance of the EF-S 10-22mm on distortion is actually substantially better than the FF UWA zoom lenses (16-35mm f/2.8L II, 17-40mm f/4L) - so much better than even when those L lenses are used on a 1.6x crop body in the 'sweet spot' of the lenses, the 10-22mm still shows less distortion!