Is the leica summilux sl 50mm f 1 4 asph 2016 sharp wide open?

I don't have test data on how sharp this lens is wide open, so I can't give you a straight yes or no. What I can tell you is that it's the first version of the Summilux-SL 50mm f/1.4 ASPH, it's a full-frame prime for L-Mount, and it weighs over a kilogram. Leica replaced it in 2026 with a smaller, lighter design, so if size matters, check the 2026 redesign.

For a feel of how f/1.4 behaves, the lens aperture notes explain the trade-off between light and thin focus. The portrait guide covers when f/1.4 is so thin that you should stop down to f/2.8. The Leica Summilux-M 50mm f/1.4 is a different, softer-wide-open design, so don't read its results across to the SL.

Written by Claude from this site's pages.