Overview

The Sigma 40mm F1.4 DG HSM Art is an optically outstanding lens, delivering exceptional sharpness and contrast across the frame, with bokeh that is pleasing. It exhibits noticeable vignetting wide open, improving when stopped down. Build quality is high, with dust/splash resistance and a manual focus ring that offers good resistance, though the lens is notably large and heavy. Autofocus performance is improved over earlier Art lenses. This lens suits photographers who prioritize optical excellence and can accommodate its size and weight, particularly for general-purpose, available-light, and natural-perspective shooting.