Quick answer
The Sigma 70-300mm f/4-5.6 DG OS is a standard to telephoto telephoto zoom lens covering 70-300mm at f/4.0 for the Pentax K mount. Its moderate maximum aperture works best in good light or with a higher ISO.
About this lens
The Sigma 70-300mm f/4-5.6 DG OS is a full-frame telephoto zoom lens covering 70-300mm at f/4-5.6 for Pentax K mount cameras, with Optical Stabilizer. The range suits sports, wildlife, events and portraits.
Sigma 70-300mm f/4-5.6 DG OS specifications
- Brand
- Sigma
- Mount
- Pentax K
- Focal length
- 70-300mm
- Maximum aperture
- f/4.0
- Lens type
- Telephoto Zoom
- Optical construction
- 16 elements in 11 groups
- Aperture blades
- 9
- Minimum focus distance
- 1.5 m
- Maximum magnification
- 0.26x
- Filter thread
- 62 mm
Specification source: dyxum.com
What can you shoot with the Sigma 70-300mm f/4-5.6 DG OS?
At 70-300mm this is a standard to telephoto telephoto zoom, which typically suits:
- Everyday and street photography
- Natural-perspective portraits
- Documentary and travel work
- Portraits with a flattering perspective
- Events and weddings
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 | 70–300mm | 6.9–28.8° | 8.2–34.3° |
| APS-C | 1.5x | 105–450mm | 4.6–19.5° | 5.5–23.3° |
Frequently asked questions
What mount does the Sigma 70-300mm f/4-5.6 DG OS use?
It uses the Pentax K mount, so it fits Pentax K cameras directly.
What is the focal length of the Sigma 70-300mm f/4-5.6 DG OS?
It zooms across 70-300mm with a maximum aperture of f/4.0. That makes it a standard to telephoto lens.
Is the Sigma 70-300mm f/4-5.6 DG OS a prime or a zoom lens?
It is a zoom lens covering 70-300mm, so you can reframe without moving. Its maximum aperture is f/4.0.
What is the Sigma 70-300mm f/4-5.6 DG OS equivalent on a crop sensor?
On APS-C (1.5x crop) it frames like 105–450mm on full frame, with a 4.6–19.5° horizontal and 5.5–23.3° diagonal field of view. These figures are calculated from the focal length and crop factor.
Which cameras does the Sigma 70-300mm f/4-5.6 DG OS 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.
More Sigma lenses for Pentax K
All Sigma lenses
Other 70-300mm lenses
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