Sigma APO 70-200mm F2.8 EX DG OS HSM review - CNET
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Sigma APO 70-200mm F2.8 EX DG OS HSM review - CNET
2013年3月29日 - The Good The Sigma APO 70-200mm F2.8 EX DG OS HSM has the fast f2.8 aperture of in-house competitors, but not their high price. It delivers ...