Reviews and Problems with Sigma 18-50mm F2.8-4.5 DC OS HSM
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Sigma 18-50mm f/2.8-4.5 DC OS HSM
18 January 2010
Summary: Overall, this lens isn't a bad performer and will suit those looking either for a replacement upgrade to their standard 18-55mm kit lens, or a solid starter lens that covers the standard focal ranges.
Pros: Internal focus and zoom, Optical Stabilisation, Good resolution at wider apertures, Low distortion
Cons: Fingers tend to catch on rotating focus ring, Resolution falloff at smaller apertures