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Rent NowThe Canon RF 100-400mm f/5.6-8 IS USM is a compact, lightweight telephoto zoom for Canon’s full-frame RF-mount mirrorless cameras. It’s a strong fit for wildlife, outdoor sports, travel and family events where you need extra reach but don’t want to carry a heavy, oversized lens. It weighs about 635g (22.4 oz), much less than traditional 100-400mm designs, so it’s easy to carry all day.
The optical design uses 12 elements in 9 groups, including one UD (Ultra-low Dispersion) element and one aspherical element. Together they control chromatic aberration and other optical issues, so images stay sharp and high in contrast from 100mm to 400mm. Canon’s Super Spectra Coating cuts flare and ghosting and keeps colors natural, even in backlit or high-contrast light. A 9-blade circular diaphragm gives smooth, natural background blur, which helps subjects stand out from busy surroundings.
Autofocus runs on a Nano USM motor, which pairs the speed of a ring-type USM with the smooth, quiet operation of a stepping motor. It’s quick enough for moving subjects and quiet and smooth enough for video. It works with the advanced autofocus systems in Canon’s EOS R cameras, including subject detection and tracking on compatible bodies. Full-time manual focus lets you fine-tune without switching modes.
The built-in Optical Image Stabilizer gives up to 5.5 stops of shake correction. On cameras with in-body image stabilization, Coordinated IS raises this to up to 6 stops. That’s a big help at 400mm, where small movements are magnified, and makes handheld shooting and smooth video more practical.
The lens has a customizable control ring that can be set to adjust aperture, shutter speed, ISO or exposure compensation directly from the lens barrel. It’s also compatible with the optional Canon Extender RF 1.4x and Extender RF 2x. With them, the lens reaches 140-560mm at f/8-11 or 200-800mm at f/11-16, and autofocus and image stabilization remain available.
Close focusing is another strength. Minimum focus distance is 0.88m (2.9′), and maximum magnification reaches 0.41x. That’s well suited to flowers, insects and other close-up nature subjects. The lens measures about 79.5 x 164.7mm, has a metal mount and takes 67mm filters.
Key Features
– Telephoto zoom for Canon RF-mount full-frame mirrorless cameras
– 100-400mm focal length
– f/5.6-8 maximum aperture, f/32-45 minimum aperture
– 12 elements in 9 groups, including 1 UD element and 1 aspherical element
– Super Spectra Coating to reduce flare and ghosting
– Nano USM autofocus motor for fast, smooth, quiet focusing
– Full-time manual focus
– Optical Image Stabilizer with up to 5.5 stops of correction
– Up to 6 stops with Coordinated IS on compatible IBIS bodies
– Customizable control ring
– Compatible with optional Extender RF 1.4x and RF 2x
– Minimum focus distance of 0.88m (2.9′)
– Maximum magnification of 0.41x
– 9-blade circular diaphragm
– 67mm filter thread
– Metal lens mount
– Weight about 635g (22.4 oz)
– Dimensions about 79.5 x 164.7mm
