Canon EF 300mm f/2.8 L IS USM vs Canon EF 400mm f/2.8 L IS USM
Prices & availability
Specification comparison
Highlighted rows differ between the two models.
| Specification | Canon EF 300mm f/2.8 L IS USM | Canon EF 400mm f/2.8 L IS USM |
|---|---|---|
| Mount | ||
| Mount | canon-ef | canon-ef |
| Optics | ||
| Focal (difference) | 300 mm | 400 mm |
| Aperture | f/2.8 | f/2.8 |
| Prime | Yes | Yes |
| Stabilization | Yes | Yes |
Verdict
Pick Model B if you need the extra 100 mm reach and can accept the slightly higher price—its focal length advantage is clear for distant subjects. Model A stays the better choice if budget is tight or if the 300 mm focal length better suits your framing needs, as the performance and aperture are otherwise identical.