Sigma 24-70mm F2.8 EX DG HSM: Digital Photography Review

Sigma’s 24-70mm F2.8 IF EX DG HSM is a replacement for its older 24-70mm F2.8 EX DG Macro lens. This large aperture standard zoom is considerably more compact than its predecessor, thanks to a brand new optical design which features 14 elements in 12 grou

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