Canon EF 75-300mm f/4-5.6 III vs Canon RF 100-400mm f/5.6-8 IS USM
Prices & availability
Specification comparison
Highlighted rows differ between the two models.
| Specification | Canon EF 75-300mm f/4-5.6 III | Canon RF 100-400mm f/5.6-8 IS USM |
|---|---|---|
| Mount | ||
| Mount (difference) | canon-ef | canon-rf |
| Optics | ||
| Focal (difference) | 75-300 mm | 100-400 mm |
| Aperture (difference) | f/4.0-5.6 | f/5.6-8.0 |
| Prime | No | No |
| Stabilization (difference) | No | Yes |
| Build | ||
| Weight (g) (difference) | 480,000 g | 635,000 g |
Verdict
Pick Model A if you need a lightweight, budget-friendly telephoto zoom for occasional use and can accept the slower aperture and shorter reach. Model B stays the better choice if you prioritize longer focal length, image stabilization, and a more modern design, and are willing to pay a significant premium for those features.