Quick answer
The Sigma 85mm f/1.4 EX DG HSM is a short telephoto prime lens covering 85mm at f/1.4 for the Pentax K mount. Its very wide maximum aperture suits low light and shallow depth of field with strong background blur.
About this lens
This 85mm f/1.4 full-frame fast short-telephoto prime lens from Sigma fits Pentax K mount cameras, with Hyper Sonic Motor autofocus. The focal length is a classic choice for portraits and details.
Sigma 85mm f/1.4 EX DG HSM specifications
- Brand
- Sigma
- Mount
- Pentax K
- Focal length
- 85mm
- Maximum aperture
- f/1.4
- Lens type
- Prime
- Optical construction
- 11 elements in 8 groups
- Aperture blades
- 9
- Minimum focus distance
- 0.85 m
- Maximum magnification
- 0.12x
- Filter thread
- 77 mm
Specification source: dyxum.com
What can you shoot with the Sigma 85mm f/1.4 EX DG HSM?
At 85mm this is a short telephoto prime, which typically suits:
- Portraits with a flattering perspective
- Events and weddings
- Isolating subjects from the background
Its very wide maximum aperture suits low light and shallow depth of field with strong background blur.
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 | 85mm | 23.9° | 28.6° |
| APS-C | 1.5x | 128mm | 16.1° | 19.3° |
Frequently asked questions
What mount does the Sigma 85mm f/1.4 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 85mm f/1.4 EX DG HSM?
It is a fixed 85mm lens with a maximum aperture of f/1.4. That makes it a short telephoto lens.
Is the Sigma 85mm f/1.4 EX DG HSM a prime or a zoom lens?
It is a prime lens with a fixed 85mm focal length. Primes usually open wider than zooms; this one opens to f/1.4.
What is the Sigma 85mm f/1.4 EX DG HSM equivalent on a crop sensor?
On APS-C (1.5x crop) it frames like 128mm on full frame, with a 16.1° horizontal and 19.3° diagonal field of view. These figures are calculated from the focal length and crop factor.
Which cameras does the Sigma 85mm f/1.4 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.
![Pentax smc Pentax-FA* 85mm f/1.4 [IF]](https://thumb.wikimedia.org/wikipedia/commons/thumb/5/54/SMCA_85mmF1.4.jpg/500px-SMCA_85mmF1.4.jpg?utm_source=commons.wikimedia.org&utm_campaign=imageinfo&utm_content=thumbnail)
