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Canon RF 400mm F2.8L IS USM

Canon RF Autofocus OIS

Canon RF 400mm F2.8L IS USM

Focal length
400 mm
Aperture
f/2.8
Weight
2890 g
Filter diameter
52 mm
Min. focus distance
250 cm
Length
367 mm
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At a Glance

This 400 mm telephoto prime for full-frame Canon RF opens up to f/2.8, which allows short shutter times and shallow depth of field at long reach. An optical stabilizer is built in. Focus presets, three IS modes, a drop-in filter slot and teleconverter compatibility round out the features. It weighs 2.9 kg and suits wildlife, birds and sports.

Good for

  • Wildlife
  • Birds
  • Sports

Worth knowing

  • At 2.9 kg it is heavy: a monopod or tripod helps for longer sessions.

Derived from the manufacturer data, not from our own tests. How we check

Technical Specifications

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Min. focal length
400 mm
Max. focal length
400 mm
Max. aperture (min. zoom)
f/2.8
Max. aperture (max. zoom)
f/2.8
Min. aperture
f/32
Elements
17
Groups
13
Weight
2,890 g (6.37 lb)
Filter diameter
52 mm
Min. focus distance
250 cm (98.43 in)
Max. magnification
1:5.9 (0.17×)
Length
367 mm (14.45 in)
Diameter
163 mm (6.42 in)
Released
July 2021

Manufacturer data: global.canon, usa.canon.com

Last checked: October 13, 2026 (against the manufacturer data) · How we check

Simulate depth of field and angle of view

Compare with other lenses

Which cameras does the Canon RF 400mm F2.8L IS USM fit?

The Canon RF 400mm F2.8L IS USM is a full-frame lens for Canon RF cameras. On full-frame bodies it uses the whole sensor; on APS-C Canon RF cameras its field of view equals 640 mm in full-frame terms.

Canon RF cameras

Full frame:
Canon EOS R8 Mark II,Canon EOS R6 V,Canon EOS R6 Mark III,Canon EOS C50,Canon EOS R1,Canon EOS R5 Mark II,Canon EOS C400,Canon EOS C80,Canon EOS R8,Canon EOS R6 Mark II,Canon EOS R5 C,Canon EOS R3,Canon EOS R5,Canon EOS R6,Canon EOS Ra,Canon EOS RP,Canon EOS R
APS-C:
Canon EOS R50 V,Canon EOS R100,Canon EOS R50,Canon EOS R7,Canon EOS R10,Canon EOS C70

Canon RF 400mm F2.8L IS USM compared

Key specs side by side with the most similar Canon RF lenses.

LensCanon RF 400mm F2.8L IS USMTTArtisan 500mm f/6.3Canon RF 100-300mm F2.8L IS USMCanon RF 100-400mm F5.6-8 IS USM
Focal length400 mm500 mm100-300 mm100-400 mm
Max. aperturef/2.8f/6.3f/2.8f/5.6-8
Weight2,890 g1,603 g2,590 g635 g
Filter diameter52 mm82 mm112 mm67 mm
Min. focus distance250 cm330 cm180 cm88 cm
Length367 mm317 mm323.4 mm164.7 mm
Autofocusyesnoyesyes
Image stabilizationyesnoyesyes
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Comparisons with this lens

Canon RF 400mm F2.8L IS USM: FAQ

Does the Canon RF 400mm F2.8L IS USM have autofocus?

Yes, the Canon RF 400mm F2.8L IS USM has autofocus.

Does the Canon RF 400mm F2.8L IS USM have image stabilization?

Yes, the Canon RF 400mm F2.8L IS USM has optical image stabilization.

How much does the Canon RF 400mm F2.8L IS USM weigh?

The Canon RF 400mm F2.8L IS USM weighs 2,890 g. It is 367 mm long with a diameter of 163 mm.

What filter size does the Canon RF 400mm F2.8L IS USM use?

The Canon RF 400mm F2.8L IS USM takes 52 mm screw-in filters.

How close can the Canon RF 400mm F2.8L IS USM focus?

The minimum focus distance of the Canon RF 400mm F2.8L IS USM is 250 cm, measured from the sensor plane.

Is the Canon RF 400mm F2.8L IS USM a full-frame lens?

Yes, the Canon RF 400mm F2.8L IS USM covers full frame. On APS-C cameras its field of view equals 640 mm in full-frame terms.

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