Focus accuracy : Sigma 17-50mm f/2.8 or Canon 17-55mm f/2.8 ?

Started Sep 11, 2012 | Discussions thread
OP yoms Forum Member • Posts: 59
Re: Easy: real Canon AF protocol or reverse-engineered AF...

Thanks to all of you for your input. That's nice of you

Interestingly, I'm switching my mind. I'll probably buy a 17-40L + 50mm which seems a better combo for my needs...

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