Review: Sigma 18-50mm f/2.8-4.5 DC OS HSM
By
Andrew Alexander, The Imaging Resource
(Monday, November 16, 2009 - 12:00 EST)
At PMA 2009, Sigma announced a new version of its 18-50mm lens series, the Sigma 18-50mm f/2.8-4.5 DC OS HSM. The chief innovation of the lens is the addition of Sigma's OS (optical stabilization) technology, as well as a slightly larger maximum aperture. Click here to read our full review of this lens.
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