Sigma 70-200mm 1:2.8 EX DG OS HSM Review: Digital Photography Review

It's now over a decade since Sigma's original 70-200mm F2.8 APO design first saw the light of day, and after three successive makeovers, the company clearly felt it was time to start again from scratch. The result is this: the 70-200mm 1:2.8 EX DG OS HSM,

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