Quick answer
The Sigma 135mm f/1.8 DG HSM Art is a short telephoto telephoto lens covering 135mm at f/1.8 for the Pentax K mount. Its fast maximum aperture helps in dim light and gives good subject separation.
About this lens
This 135mm f/1.8 full-frame fast short-telephoto prime lens from Sigma fits Pentax K mount cameras, from the Sigma Art line with Hyper Sonic Motor autofocus. The focal length is a classic choice for portraits and details.
Sigma 135mm f/1.8 DG HSM Art specifications
- Brand
- Sigma
- Mount
- Pentax K
- Focal length
- 135mm
- Maximum aperture
- f/1.8
- Lens type
- Telephoto
- Format coverage
- full-frame
- Optical construction
- 13 elements in 10 groups
- Aperture blades
- 9
- Autofocus motor
- HSM
- Minimum focus distance
- 0.88 m
- Maximum magnification
- 0.2x
- Filter thread
- 82 mm
Specification source: sigmaphoto.com
What can you shoot with the Sigma 135mm f/1.8 DG HSM Art?
At 135mm this is a short telephoto telephoto, which typically suits:
- Portraits with a flattering perspective
- Events and weddings
- Isolating subjects from the background
Its fast maximum aperture helps in dim light and gives good subject separation.
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 | 135mm | 15.2° | 18.2° |
| APS-C | 1.5x | 203mm | 10.2° | 12.2° |
Frequently asked questions
What mount does the Sigma 135mm f/1.8 DG HSM Art use?
It uses the Pentax K mount, so it fits Pentax K cameras directly.
What is the focal length of the Sigma 135mm f/1.8 DG HSM Art?
It is a fixed 135mm lens with a maximum aperture of f/1.8. That makes it a short telephoto lens.
Is the Sigma 135mm f/1.8 DG HSM Art a prime or a zoom lens?
It is a prime lens with a fixed 135mm focal length. Primes usually open wider than zooms; this one opens to f/1.8.
What is the Sigma 135mm f/1.8 DG HSM Art equivalent on a crop sensor?
On APS-C (1.5x crop) it frames like 203mm on full frame, with a 10.2° horizontal and 12.2° diagonal field of view. These figures are calculated from the focal length and crop factor.
Which cameras does the Sigma 135mm f/1.8 DG HSM Art 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.
