Quick answer
The Sigma 300mm f/4 APO is a telephoto telephoto lens covering 300mm at f/4.0 for the Sigma SA mount. Its moderate maximum aperture works best in good light or with a higher ISO.
About this lens
The Sigma 300mm f/4 APO is a telephoto prime lens covering 300mm at f/4 for Sigma SA mount cameras, with apochromatic correction. It brings distant subjects closer for sports, wildlife and events.
Sigma 300mm f/4 APO specifications
What can you shoot with the Sigma 300mm f/4 APO?
At 300mm this is a telephoto telephoto, which typically suits:
- Sports and action
- Wildlife and birds at moderate distance
- Compressing distant landscapes
Its moderate maximum aperture works best in good light or with a higher ISO.
Full-frame equivalent and field of view
Calculated from the focal length and crop factor. Not measured.
| Sensor | Crop | Equivalent | Horizontal FOV | Diagonal FOV |
|---|---|---|---|---|
| Full frame | 1.0x | 300mm | 6.9° | 8.2° |
| APS-C | 1.5x | 450mm | 4.6° | 5.5° |
Frequently asked questions
What mount does the Sigma 300mm f/4 APO use?
It uses the Sigma SA mount, so it fits Sigma SA cameras directly.
What is the focal length of the Sigma 300mm f/4 APO?
It is a fixed 300mm lens with a maximum aperture of f/4.0. That makes it a telephoto lens.
Is the Sigma 300mm f/4 APO a prime or a zoom lens?
It is a prime lens with a fixed 300mm focal length. Primes usually open wider than zooms; this one opens to f/4.0.
What is the Sigma 300mm f/4 APO equivalent on a crop sensor?
On APS-C (1.5x crop) it frames like 450mm on full frame, with a 4.6° horizontal and 5.5° diagonal field of view. These figures are calculated from the focal length and crop factor.
