Lens Lab
    Canon EF 400mm F4 DO IS II USM
    Canon EF 400mm F4 DO IS II USM

    Canon EF 400mm F4 DO IS II USM

    400mm · f/4

    Overview

    The Canon EF 400mm F4 DO IS II USM is a lightweight, hand-holdable supertelephoto lens ideal for sports and wildlife photographers. Its diffractive optics enable a compact design, but early copies showed sharpness variability. Optically, it delivers outstanding sharpness wide open, with diffraction limiting performance. Build quality is robust with weather sealing, though the tripod collar is non-removable. The lens excels with extenders compared to its predecessor. It suits professionals prioritizing portability over the fastest aperture.