Sigma 50mm F1.4 DG DN | Art (L-Mount)

Sigma designed this 50mm F1.4 Art for mirrorless cameras from the start, replacing its DSLR-era 50mm Art. In L-Mount it weighs 670g and is 109.5mm long, which is lighter and shorter than the adapted DG HSM design it replaced. It was the first DG DN Art lens to use Sigma's HLA linear motor, which drives a single double-sided aspherical focus element.

The optics use 14 elements in 11 groups, including one SLD and three aspherical elements. Sigma's stated goal was low astigmatism, low field curvature and low sagittal coma flare from f/1.4. The barrel has an aperture ring with a click switch and a lock, an AFL button, an AF/MF switch and dust and splash sealing. The front element has a water- and oil-repellent coating. On L-Mount you can switch the focus ring between linear and non-linear response, and the lens works with Sigma's USB Dock.