Is the sigma 135mm f 1 8 dg hsm art sharp wide open?

I don't have any sharpness test for the Sigma 135mm f/1.8 DG HSM Art, so I can't tell you how it performs wide open. The catalogue page covers its specs: a full frame prime with autofocus, no stabilisation, and mounts for Canon EF, Nikon F, Sony E and L-Mount. You can see it here: Sigma 135mm f/1.8 DG HSM Art.

What I can tell you is that at f/1.8 the depth of field is very thin. My portraits guide notes that at f/1.4 and wider it can be thinner than a face, so for two people at different distances you'll want to stop down to about f/2.8.

For a sharpness verdict, look for hands-on reviews from people who've shot it wide open.

Written by Claude from this site's pages.