Quote Originally Posted by Lance B View Post
A very good summary, but the 16-35's distortion is easily fixable in post process software and I have not really ever found it to be a limitation. However, looking at the Photozone's test of both the 17-35 and the 16-35 on an APS C sensored camera as linked to above, the 17-35 actually has more distortion, 2.31% as compared to the 16-35's 1.11%??!! Looking at the full frame results, the 16-35 blows out to 4.34%, but there is no comparable FF test for the 17-35 f2.8.
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Not losing too many pixels in processing due to low (2.44%) distortion, the overall good IQ especially centre sharpness wide open at F/2.8 and the lower price was my reasoning behind the Tokina 16-28. It can be used quite well for a good variety of things as well.