Canon EF 300mm F/4 L USM
Specifications01
Summary02
Canon EF 300mm f/4 L prime telephoto lens for Canon EF mounts. Uses a fixed maximum aperture of f/4 and is suited to wildlife, sports, and general telephoto photography.
AI-assisted summary — verify against linked sourcesWhere can this lens be adapted?
The Canon EF mount has a flange distance of 44 mm. A plain adapter fits a camera whose flange distance is at least 1.46 mm shorter. How lens adapters work
- EF-S lenses fit APS-C Canon DSLRs only, not full-frame EF bodies.
- Native lenses set the aperture, and often the focus, electronically. On a plain adapter they do not work. Use an electronic adapter made for this pair; for many pairs nobody makes one. Fully manual lenses are the exception.
- Sony EAdapter · 26 mm
Covers APS-C: it can vignette on a full-frame sensor.
The camera mount (46.1 mm) is narrower than the lens mount (54 mm). A large rear element can darken the corners.
- Canon RFAdapter · 24 mm
Covers APS-C: it can vignette on a full-frame sensor.
- Nikon ZAdapter · 28 mm
Covers APS-C: it can vignette on a full-frame sensor.
- Fujifilm XAdapter · 26.3 mm
- L-MountAdapter · 24 mm
Covers APS-C: it can vignette on a full-frame sensor.
The camera mount (51.6 mm) is narrower than the lens mount (54 mm). A large rear element can darken the corners.
- Micro Four ThirdsAdapter · 24.75 mm
- Fujifilm G (GFX)Adapter · 17.3 mm
Covers APS-C: it can vignette on a medium format sensor.
- Canon EF-MAdapter · 26 mm
- Canon EFNative
No plain adapter reaches infinity focus on: Nikon F.
Sources03

Other Mounts03
No alternate mounts are indexed for this family yet.