Jan 13, 2020 · 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.