Sigma 18-250mm DC OS HSM review
Just posted! Our lens review of the Sigma 18-250mm F3.5-6.3 DC OS HSM. Sigma's latest superzoom is essentially an extension of the company's older 18-200mm design, but now sports both optical image stabilization and an in-lens hypersonic autofocus motor for users of Canon, Nikon, Pentax and Sony DSLRs. But in this popular segment of the market it faces stiff competition, not only from the camera manufacturers' own offerings but also from Tamron's superzoom designs. So how does it measure up?
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