Sigma’s new 35mm F1.4 DG DN Art lens is a big leap forward from the company’s original 2012-era Art-series prime, and features an entirely new optical construction and refined handling, specifically designed for stills and video shooting on full-frame mirrorless cameras. Available for both Sony E-mount and Panasonic/Leica/Sigma L-mount bodies, we tested it with both the high-resolution Panasonic Lumix DC-S1R and the 24MP Lumix DC-S5.