Is Canon EOS R3 and Canon EF 400mm F4 DO IS USM compatible?

Below you will find your chosen camera and lens. Click on the product name for more information.

Buy	Canon EOS R3 Released: 2021 Type: Mirrorless Sensor: Full frame 24 Megapixels 6000 x 4000 pixels
Buy	Canon EF 400mm F4 DO IS USM Released: 2001 Telephoto Prime Lens Focal Length: 400 mm Aperture: f/4

Can you combine these two?

Last updated: November 2024

This is the short answer:

The camera and lens you have chosen can be used together if you use the desired adapter.

You must use an EOS R adapter

This Canon lens is not part of the Canon EOS R-system but it can still be used with Canon EOS R cameras. To use this lens on this camera you need an adapter.

Canon Lens Mount Adapter EF-EOS R

Focal Length

The Canon camera has a sensor of type Full frame which means that your experienced Focal length will be same as the lens specification tells us.

This lens has focal length:
400 mm

Since Canon EOS R3 has a Full Frame sensor this is also the focal length you will experience.

Total weight

When you are looking at a combination of a camera and a lens you must always consider the total weight. Each product weighs in at:

Canon EOS R3
1015 gram

Canon EF 400mm F4 DO IS USM
1940 gram

Together they have a total weight of 2955 gram (equal to 6.51 lb).

Please note that Canon EF 400mm F4 DO IS USM has a tripod mount which is great.

Read more about Tripod mount

Compatibility Check ID: 1500

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