Quote:
Originally Posted by gars
The new Sigma 17-50mm F2.8 OS is a biiiig competitor to the Canon 17-55mm F2.8 IS. It's quite comparable in sharpness and quite a bit cheaper as well. I think the Canon focus is faster and more silent, but make sure you consider the Sigma. I got one a few months ago and I'm super happy with it!
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how did you test it when you went to get the sigma?