Quick answer
The Tamron SP 45mm f/1.8 Di VC USD is a standard prime lens covering 45mm 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
A 45mm f/1.8 full-frame fast standard prime lens, the Tamron SP 45mm f/1.8 Di VC USD is designed for Pentax K mount bodies, from the Tamron SP series with Vibration Compensation. The natural field of view suits street, documentary and everyday photography.
Tamron SP 45mm f/1.8 Di VC USD specifications
- Brand
- Tamron
- Mount
- Pentax K
- Focal length
- 45mm
- Maximum aperture
- f/1.8
- Lens type
- Prime
- Image stabilization
- Yes
- Autofocus motor
- USD
- Minimum focus distance
- 0.29 m
- Filter thread
- 67 mm
Specification source: wikidata.org
What can you shoot with the Tamron SP 45mm f/1.8 Di VC USD?
At 45mm this is a standard prime, which typically suits:
- Everyday and street photography
- Natural-perspective portraits
- Documentary and travel work
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 | 45mm | 43.6° | 51.4° |
| APS-C | 1.5x | 68mm | 29.9° | 35.5° |
Frequently asked questions
What mount does the Tamron SP 45mm f/1.8 Di VC USD use?
It uses the Pentax K mount, so it fits Pentax K cameras directly.
What is the focal length of the Tamron SP 45mm f/1.8 Di VC USD?
It is a fixed 45mm lens with a maximum aperture of f/1.8. That makes it a standard lens.
Is the Tamron SP 45mm f/1.8 Di VC USD a prime or a zoom lens?
It is a prime lens with a fixed 45mm focal length. Primes usually open wider than zooms; this one opens to f/1.8.
What is the Tamron SP 45mm f/1.8 Di VC USD equivalent on a crop sensor?
On APS-C (1.5x crop) it frames like 68mm on full frame, with a 29.9° horizontal and 35.5° diagonal field of view. These figures are calculated from the focal length and crop factor.
Which cameras does the Tamron SP 45mm f/1.8 Di VC USD 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.
