Canon EF 400mm f/2.8 L IS USM vs Canon EF 600mm f/4 L USM
Prices & availability
Specification comparison
Highlighted rows differ between the two models.
| Specification | Canon EF 400mm f/2.8 L IS USM | Canon EF 600mm f/4 L USM |
|---|---|---|
| Mount | ||
| Mount | canon-ef | canon-ef |
| Optics | ||
| Focal (difference) | 400 mm | 600 mm |
| Aperture (difference) | f/2.8 | f/4.0 |
| Prime | Yes | Yes |
| Stabilization (difference) | Yes | No |
Verdict
Pick Model A if you need the brighter f/2.8 aperture for low-light performance or shallower depth of field, or if the 400mm reach suffices for your subjects. Model B stays the better choice if you prioritize the extra 200mm of focal length for distant subjects and can work with the slightly slower f/4 aperture. Budget is nearly identical, so the decision hinges solely on aperture versus reach.