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The Sigma 24-70mm f2.8 DG DN Art is a bright-aperture general-purpose zoom for Sony e-mount and Leica L-mount mirrorless cameras, that's a viable alternative to the original 24-70mm f2.8 lenses from Sony and Panasonic - not to mention Canon and Nikon, should Sigma develop RF and Z-mount versions. Although the lens comes at a much lower price Sigma has designed it well.
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