As a USM upgrade to my venerable EF 20-35mm f/2.8L, I'm considering one of the newer lenses.
Has anyone used them both and compared sharpness and linear distortion between the EF 16-35mm f/2.8L USM and the older EF 17-35mm f/2.8L USM? Yes, I realize I get an extra mm at the wide-angle position with the former.
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