Sigma 12-24mm f4 Art review

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The new Sigma Art AF 12-24/4.0 DG HSM is a worthy successor to Sigma’s AF 12-24mm 4.5-5.6 II DG HSM model from 2011. Optical performance is very good and other aspects of the lens are also improved: The focal ratio is now a constant f4.0, AF is faster, and you get compatibility with Sigma’s USB dock to fine tune…

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