Compare lenses
Canon EF 400mm f/2.8L IS III USM vs Canon EF 400mm f/4 DO IS II USM
The Canon EF 400mm f/2.8L IS III USM and the Canon EF 400mm f/4 DO IS II USM side by side, computed from this guide's catalogue.
Which to pick
Pick the Canon EF 400mm f/2.8L IS III USM if you want a brighter f/2.8 (1.0 stops more light), for dim light and softer backgrounds. On these specs the Canon EF 400mm f/4 DO IS II USM has no clear advantage: choose it if the price, the handling or a lens you own decides it.
Specs side by side
| Spec | Canon EF 400mm f/2.8L IS III USM | Canon EF 400mm f/4 DO IS II USM |
|---|---|---|
| Maker | Canon | Canon |
| Focal length | 400mm (prime) | 400mm (prime) |
| Full-frame equivalent | 400mm | 400mm |
| Maximum aperture | f/2.8brighter | f/4 |
| Made for | Full frame | Full frame |
| Mounts | Canon EF | Canon EF |
| Stabilised | yes | yes |
| Autofocus | yes | yes |
| Cameras it fits | 22 in this guide | 22 in this guide |
Focal range, in full-frame terms
Aperture
Each opening drawn to scale against f/1.4: a smaller f-number lets in more light and blurs the background more.
Field of view
Cameras they fit
22 cameras in this guide take both, so either works on the same body.
Canon EF 400mm f/2.8L IS III USM
- Canon EOS-1D X Mark III
- Canon EOS 850D
- Canon EOS 250D
- Canon EOS 90D
- Canon EOS 2000D
- Canon EOS 4000D
- Canon EOS 6D Mark II
- Canon EOS 200D
- Canon EOS 77D
- Canon EOS 800D