Lens Lab
    Sigma 135-400 mm f/ 4.5-5.6 APO DG
    Sigma 135-400 mm f/ 4.5-5.6 APO DG

    Sigma 135-400 mm f/ 4.5-5.6 APO DG

    135–400mm · f/4.5–5.6

    Overview

    The Sigma 135-400mm f/4.5-5.6 APO DG is a budget telephoto zoom offering good value for wildlife and sports enthusiasts. Optically, it delivers decent resolution and very low distortion, though sharpness is soft at 400mm. Build quality is solid with a detachable tripod collar, but the zoom ring is stiff and the focus ring awkwardly placed. It suits hobbyists on a tight budget who need reach without breaking the bank.