Canon EF 300mm f/2.8 L IS II USM vs Canon EF 400mm f/4 DO IS II USM
Prices & availability
Specification comparison
Highlighted rows differ between the two models.
| Specification | Canon EF 300mm f/2.8 L IS II USM | Canon EF 400mm f/4 DO IS II USM |
|---|---|---|
| Mount | ||
| Mount | canon-ef | canon-ef |
| Optics | ||
| Focal (difference) | 300 mm | 400 mm |
| Aperture (difference) | f/2.8 | f/4.0 |
| Prime | Yes | Yes |
| Stabilization | Yes | Yes |
Verdict
Pick Model A if you need the brighter f/2.8 aperture for low-light performance or shallower depth of field, and the 300mm reach suffices. Model B stays the better choice if you prioritize the extra 100mm reach and lighter weight over aperture, and the f/4 maximum aperture meets your needs.