Reviews and Problems with Canon EF 20-35mm f/3.5-4.5 USM
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15 September 2009
Conclusion: Sometimes you get much more than you pay for, like with the 28mm 2.8 lens, but most of the time you get what I got here. This is really not a great lens. Save your $100 and put it toward something better.
Cons: very soft in the corners, not much sharper in the center.
Conclusion: I bought this lens to complement my 5D (full frame body). It works fine, but it has VERY noticeable barrel distortion at the 20mm end, where I would be using it most. It IS a wide angle zoom, after all. If you are shooting buildings and/or interiors like I do, don't bother considering this lens. I had a Sigma 12-24 (full frame) from my 10D/20D bodies (1.6X) and that lens gives me much better results at 20mm.
Pros: Small, lightweight and takes front filters. FTM and the USM are nice features, too.
Cons: BARREL DISTORTION at 20mm. Don't buy it expecting to shoot things with straight lines in them.