Overview

The Sigma 50-100mm f/1.8 DC HSM Art is a fast telephoto zoom for APS-C cameras, offering an f/1.8 aperture across the range—unique among zooms. Optically, it delivers excellent center sharpness and contrast, but corners are soft wide open, improving by f/4. Build quality is robust with metal construction and a tripod collar, though the lens is heavy. Autofocus is quick and quiet but can be inconsistent on DSLRs; it performs better on mirrorless. It suits portrait, event, and low-light photographers who prioritize speed over zoom range.