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Canon 20-35mm f3.5-4.5 USM

Test Results - standard DSLR

Full Aperture Sharpness in the center of the frame at at all focal lengths is good to very good, but corners are slightly soft, pretty much as you would expect. Although best in the center at 35mm, and worst in the corner at the same focal length, the overall character of the results is fairly even. Slightly soft overall especially at the edges, with slight distortion in the corner at 20mm. With a super wide zoom like the Canon 20-35 3.5-4.5 slight is a good word to hear.

All crops below are sections of the test images at full size - 100%

CENTER                                     CORNER

center               20mm f 3.5            corner

center              28mm f 4             corner

center               35mm f 4.5            corner

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