Lens Lab
    Sigma AF 80-400 mm f/ 4.5-5.6 APO EX OS
    Sigma AF 80-400 mm f/ 4.5-5.6 APO EX OS

    Sigma AF 80-400 mm f/ 4.5-5.6 APO EX OS

    80–400mm · f/4.5–5.6

    Overview

    The Sigma AF 80-400mm f/4.5-5.6 APO EX OS is a solidly built telephoto zoom with effective optical stabilization, offering about 2 stops of handholdability. Optical quality is decent: distortion is minimal and chromatic aberration is well controlled, though colors are less vibrant than Canon L-series lenses. The autofocus is loud and slow, lacking HSM. The lens is heavy at 3.6 lb and the OS can cause erratic mirror behavior on tripods. It suits budget-conscious users needing long reach with stabilization, but not those requiring fast, quiet AF.