Lens Lab
    Canon EF 20-35mm F3.5-4.5 USM
    Canon EF 20-35mm F3.5-4.5 USM

    Canon EF 20-35mm F3.5-4.5 USM

    20–35mm · f/3.5–4.5

    Overview

    The Canon EF 20-35mm f/3.5-4.5 USM is a lightweight, full-frame ultrawide zoom with excellent ergonomics, including internal zoom/focus and full-time manual override. Optically, it delivers good center sharpness but suffers from strong barrel distortion at the wide end and noticeable chromatic aberration, though modern cameras can correct this. Build quality is decent for its class, with a metal mount and smooth controls. It suits budget-conscious full-frame users seeking a compact ultrawide, but its range is impractical on APS-C.