Got to test out a couple of Sigma lenses this last few days. A Sigma AF 20mm f1.4 DG HSM Art and a Sigma AF 100-400mm f5-6.3 DG OS HSM C. Here are two photos comparing the zoom range of the Sigma 100-400mm lens. One of the left is at 100mm and the one on the right is at 400mm. […]

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