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smc Pentax-FA 31mm f/1.8 AL Limited
- 31mm
- f/1.8
- Prime
- 350 g
- Min focus 0.3 m
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Quick answer
A celebrated wide-normal prime in Pentax's FA Limited trio. It covers full-frame film and digital.
Pros
- Excellent rendering
- All-metal build
- Full-frame coverage
Cons
- Not weather-sealed
- Limited availability
Verdict
Consider it a beloved Pentax lens that remains in demand.
About this lens
This 31mm f/1.8 fast wide-angle prime lens from Pentax fits Pentax K mount cameras. A compact, metal-bodied Limited-series prime for Pentax K-mount cameras.
Pentax smc Pentax-FA 31mm f/1.8 AL Limited specifications
- Brand
- Pentax
- Mount
- Pentax K
- Focal length
- 31mm
- Maximum aperture
- f/1.8
- Lens type
- Prime
- Format coverage
- full-frame
- Optical construction
- 9 elements in 7 groups
- Aperture blades
- 9
- Autofocus motor
- screw-drive
- Minimum focus distance
- 0.3 m
- Maximum magnification
- 0.16x
- Filter thread
- 58 mm
- Weight
- 350 g
- Length
- 69 mm
- Diameter
- 66 mm
Specification source: en.wikipedia.org
What can you shoot with the Pentax smc Pentax-FA 31mm f/1.8 AL Limited?
- Street
- Documentary
- Landscape
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 | 31mm | 60.3° | 69.8° |
| APS-C | 1.5x | 47mm | 42.3° | 49.9° |
Frequently asked questions
Is the Pentax smc Pentax-FA 31mm f/1.8 AL Limited full-frame?
Yes. It covers the full 35mm frame, and it can also be used on APS-C bodies with a crop.
What other lenses are in the FA Limited trio?
The FA Limited trio is the 31mm f/1.8, the 43mm f/1.9 and the 77mm f/1.8.
Is the Pentax smc Pentax-FA 31mm f/1.8 AL Limited sealed?
No. It is not sealed, so avoid rain and heavy dust.
Alternatives for Pentax K from other brands
All Pentax K lensesSame mount, overlapping focal range, closest maximum aperture first.
