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Latest Review Posted Sigma 17-50mm F2.8 EX DC HSM
Excellent general purpose/walk around lens. Have owned it for a year now, and except for telephoto work, it's the lens that's always on the camera.

There is some softness in the corners at its widest (not surprising), but the center is very good wide open, and once stopped down a bit (f/4 or more) this lens is amazingly sharp. Very little aberration to deal with, and certainly nothing that doesn't disappear completely in post-processing. Bokeh is not too bad, but I suppose could be better. Given that this isn't really meant as a portrait lens, this is not surprising, and quite forgivable.

Sigma's HSM is quiet, reliable, and reasonably fast. The build quality is very high, I only wish it had weather sealing - if that were the case, it might not ever leave the camera!

It is heavier (and bigger) than a kit 18-55, but the better image quality and faster aperture more than make up for that, I think.

Overall, an excellent option for a fast, standard walk around zoom, especially considering its relatively low price.

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