Quick answer
The Pentax DA* 55mm lens is a standard prime lens covering 55mm 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
Pentax DA* 55mm lens: a fast standard prime lens with a 55mm focal length and a maximum aperture of f/1.4, made for Pentax K mount cameras. A premium weather-resistant "Star" series lens for Pentax K-mount cameras.
Pentax DA* 55mm lens specifications
- Brand
- Pentax
- Mount
- Pentax K
- Focal length
- 55mm
- Maximum aperture
- f/1.4
- Lens type
- Prime
- Format coverage
- aps-c
- Minimum focus distance
- 0.45 m
- Filter thread
- 58 mm
- Weight
- 375 g
- Length
- 66 mm
- Diameter
- 70 mm
Specification source: wikidata.org
What can you shoot with the Pentax DA* 55mm lens?
At 55mm this is a standard prime, which typically suits:
- Everyday and street photography
- Natural-perspective portraits
- Documentary and travel work
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 |
|---|---|---|---|---|
| APS-C | 1.5x | 83mm | 24.6° | 29.4° |
Frequently asked questions
What mount does the Pentax DA* 55mm lens use?
It uses the Pentax K mount, so it fits Pentax K cameras directly.
What is the focal length of the Pentax DA* 55mm lens?
It is a fixed 55mm lens with a maximum aperture of f/1.4. That makes it a standard lens.
Is the Pentax DA* 55mm lens a prime or a zoom lens?
It is a prime lens with a fixed 55mm focal length. Primes usually open wider than zooms; this one opens to f/1.4.
What is the Pentax DA* 55mm lens equivalent on a crop sensor?
On APS-C (1.5x crop) it frames like 83mm on full frame, with a 24.6° horizontal and 29.4° diagonal field of view. These figures are calculated from the focal length and crop factor.
Which cameras does the Pentax DA* 55mm lens 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.
