Canon 4318C002 RF 70-200mm f/4L IS USM camera lens

RF 70-200mm f/4L IS USM telephoto zoom

The Canon RF 70-200mm f/4L IS USM is a constant-aperture telephoto zoom for full-frame Canon RF-mount mirrorless cameras. It combines four ultra-low dispersion elements, Air Sphere and fluorine coatings, and a dual Nano USM autofocus system in a weather-sealed barrel. A customisable control ring adds direct access to exposure settings. Optical image stabilisation works with in-body stabilisation for up to 7.5 stops of shake correction.

Replaces variable-aperture zooms

Photographers moving from slower variable-aperture telephotos gain a constant f/4 aperture across the 70-200mm range for consistent exposure and depth-of-field control. The jump is worth it when you need quieter, faster dual Nano USM focusing and up to 7.5 stops of coordinated stabilisation for handheld low-light work. Buyers who need a wider maximum aperture or a shorter minimum focus distance should look elsewhere.

Practical limits of the RF mount and f/4 aperture

The lens uses the RF mount’s short flange distance and high-speed communication for the dual Nano USM drive and coordinated stabilisation. At f/4 the aperture range stops at f/32, so extreme depth-of-field needs may require additional lighting or higher ISO. The 1.2-mile video transmission reference in the supplied data belongs to a different product and does not apply to this lens.