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Originally Posted by frank231160
Whats your opinion on Sigma pro lenses and do they match those of Canon ?
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I've got a Sigma 10-20 and 30mm. They're both EX (and both for crop cameras), and build quality is great but no where near that of my 17-40L. Image quality is great too, but again not near the quality of an L lens. But they're also a lot cheaper, and if you compare them to similarly priced Canon consumer lenses they compete very well and I'm very happy with mine. So if you're on a budget then I'd say to definitely consider the EX range.