Overview

The Sigma 135mm F1.4 DG ART is the world's first 135mm f/1.4 autofocus lens, offering exceptional subject isolation and bokeh. Optically, it delivers impressive sharpness and contrast wide open, though some find bokeh highlights occasionally distracting. Build quality is robust with a removable Arca-Swiss tripod collar and declickable aperture ring, but the lens is heavy at ~1316g. Autofocus is fast and accurate, though focus drift may occur in high-speed bursts. It suits portrait and low-light photographers seeking extreme shallow depth of field, but its size, weight, and $1899 price make it a specialized tool.