15-30 on full frame.

Started Aug 22, 2008 | Discussions thread
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Jon Laye Senior Member • Posts: 2,485
Re: 15-30 on full frame.

For sharpness the 15-30 is excellent. There is some softness in the corners, a bit more then the Canon 17-40 F4, but I think the Sigma is a bit sharper in the center area. The Sigma is very flare prone while the Canon 17-40 is extremely resistant. BUT, nothing optically can alter the poor handling of the Sigma. The switch/clutch AF.MF system is very poor. I traded my 15-30 in for the 17x40 even before I saw the first images from the 17-40.

Jon

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