Photo: Jun Ohwada (CC BY 2.0)
Quick answer
A tiny metal-bodied pancake lens for Pentax APS-C bodies, weighing about 90 g. It is 15 mm long and takes 49mm filters.
Pros
- Very small at about 90 g
- Metal build
- Natural normal view on APS-C
- Sharp
Cons
- APS-C only
- f/2.8 is not fast
- No weather sealing
Verdict
A tiny, well-made pancake lens for Pentax crop bodies.
About this lens
A 40mm f/2.8 standard prime lens, the Pentax smc DA 40mm F2.8 Limited is designed for Pentax K mount bodies. A compact, metal-bodied Limited-series prime for Pentax K-mount cameras.
Pentax smc DA 40mm F2.8 Limited specifications
- Brand
- Pentax
- Mount
- Pentax K
- Focal length
- 40mm
- Maximum aperture
- f/2.8
- Lens type
- Prime
- Format coverage
- aps-c
- Minimum focus distance
- 0.4 m
- Filter thread
- 49 mm
- Weight
- 90 g
- Length
- 15 mm
- Diameter
- 63 mm
Specification source: wikidata.org
What can you shoot with the Pentax smc DA 40mm F2.8 Limited?
- Street and travel
- Casual portraits
- Pocketable kits
Its bright maximum aperture handles indoor and evening light reasonably well.
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 | 60mm | 33.4° | 39.7° |
Frequently asked questions
What filter size does the Pentax smc DA 40mm F2.8 Limited use?
The front thread measures 49mm, which is the size to look for when choosing a polarizer, UV or ND filter.
How close can it focus?
Minimum focus is 0.4 m. That works for detail shots and small subjects, though it is not a dedicated macro unless stated.
Is the Pentax DA 40mm Limited a full-frame lens?
No. It is designed for APS-C sensors, so on a full-frame body it will crop or vignette.
Alternatives for Pentax K from other brands
All Pentax K lensesSame mount, overlapping focal range, closest maximum aperture first.
