Leica super apo summicron sl 21mm f 2 asph vs sigma 20mm f 1 4 dg hsm art?

Both are wide primes that frame almost the same on full frame, so the choice comes down to aperture and mount. The Sigma 20mm f/1.4 DG HSM Art is the faster lens, and that extra light helps in dim rooms, at night and in other low-light scenes. The Leica Super-APO-Summicron-SL 21mm f/2 ASPH is slower, but it's made for the L-Mount and is the native choice for Leica SL bodies.

The Sigma also comes in Canon EF, Nikon F, Sony E and L-Mount, so it's the more flexible buy if you switch systems. Both fit bodies like the Leica SL3 and the Panasonic Lumix S5. Neither lens is stabilised, so keep your shutter speed up when handheld.

Written by Claude from this site's pages.