Lens Lab
    Sigma 120-400mm F4.5-5.6 DG OS HSM
    Sigma 120-400mm F4.5-5.6 DG OS HSM

    Sigma 120-400mm F4.5-5.6 DG OS HSM

    120–400mm · f/4.5–5.6

    Overview

    The Sigma 120-400mm F4.5-5.6 DG OS HSM is a competitively-priced telephoto zoom with solid build and smooth handling. Optically, it is sharp at wide angles but degrades significantly at the long end, especially wide open, requiring stopping down to f/8 or f/11 for acceptable sharpness. The optical stabilizer is effective up to 4 stops. It suits budget-conscious wildlife or sports photographers who prioritize reach and value over ultimate image quality.