Lens Lab
    Sigma 10-20mm F3.5 EX DC HSM
    Sigma 10-20mm F3.5 EX DC HSM

    Sigma 10-20mm F3.5 EX DC HSM

    10–20mm · f/3.5

    Overview

    The Sigma 10-20mm F3.5 EX DC HSM is a well-built ultra-wide zoom for APS-C cameras, offering a constant f/3.5 aperture. Optical strengths include good sharpness at 10mm wide open, with soft corners that improve when stopped down. Weaknesses are higher chromatic aberration than its predecessor and some corner shading at wide apertures. Build quality is excellent with smooth rings, though the focus ring is a bit stiff. It suits landscape and general wide-angle shooters needing a fast, durable lens.