Quick answer
The Sigma 300mm f/2.8 APO EX DG HSM is a telephoto telephoto lens covering 300mm at f/2.8 for the Pentax K mount. Its bright maximum aperture handles indoor and evening light reasonably well.
About this lens
This 300mm f/2.8 full-frame telephoto prime lens from Sigma fits Pentax K mount cameras, with Hyper Sonic Motor autofocus and apochromatic correction. It brings distant subjects closer for sports, wildlife and events.
Sigma 300mm f/2.8 APO EX DG HSM specifications
What can you shoot with the Sigma 300mm f/2.8 APO EX DG HSM?
At 300mm this is a telephoto telephoto, which typically suits:
- Sports and action
- Wildlife and birds at moderate distance
- Compressing distant landscapes
Its bright maximum aperture handles indoor and evening light reasonably well.
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/2.8 APO EX DG HSM use?
It uses the Pentax K mount, so it fits Pentax K cameras directly.
What is the focal length of the Sigma 300mm f/2.8 APO EX DG HSM?
It is a fixed 300mm lens with a maximum aperture of f/2.8. That makes it a telephoto lens.
Is the Sigma 300mm f/2.8 APO EX DG HSM 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/2.8.
What is the Sigma 300mm f/2.8 APO EX DG HSM 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.
Which cameras does the Sigma 300mm f/2.8 APO EX DG HSM fit?
Any Pentax K-mount camera, including Pentax K-1, Pentax K-3, Pentax K-3 II, Pentax K-3 Mark III, and Pentax K-30 and 15 more.
Alternatives for Pentax K from other brands
All Pentax K lensesSame mount, overlapping focal range, closest maximum aperture first.
