Overview

The Sigma 135mm F1.8 Art is a sharp, well-built lens with excellent center-to-edge sharpness and minimal distortion. It has a metal construction and a padded case, but is heavier and longer than the Sony GM. The lens vignettes less than the Canon 135mm F2, though some users report autofocus inconsistencies on Canon bodies. It suits portrait, event, and low-light photographers who prioritize optical quality over portability.