The Pentax smc Pentax-DA 40mm f/2.8 XS is a 40 mm prime lens with a maximum aperture of f/2.8 for the Pentax KAF2 mount. Here are its field of view on different sensors, hyperfocal distances and the cameras it fits.
Focal length
40 mm
Max aperture
f/2.8
Mount
Pentax KAF2
Designed for
Full frame
Field of view by sensor
| Sensor | Diagonal angle of view | 35 mm equivalent |
|---|---|---|
| Full frame | 56.8° | 40 mm |
| APS-C (1.5×) | 38.9° | 61 mm |
| Canon APS-C (1.6×) | 37.4° | 64 mm |
| Micro Four Thirds | 30.3° | 80 mm |
Hyperfocal distance
| Focal length | f/2.8 | f/5.6 | f/8 | f/11 | f/16 |
|---|---|---|---|---|---|
| 40 mm | 19 m | 9.6 m | 6.7 m | 4.9 m | 3.4 m |
Circle of confusion 0.030 mm (sensor size the lens is designed for).
Cameras that fit (43)
- Pentax 35mm film: full frame
- Pentax *ist DL2
- Pentax *ist DL
- Pentax *ist DS2
- Pentax *ist DS
- Pentax *ist D
- Pentax K-m
- Pentax K100D
- Pentax K100D Super
- Pentax K110D
- Pentax K10D
- Pentax K20D
- Pentax K-30
- Pentax K-50
- Pentax K-500
- Pentax K-7
- Pentax K-52010
- Pentax K-5 II2012
- Pentax K-5 IIs
- Pentax K-32013
- Pentax K-3 II2015
- Pentax K-3 III2021
- Pentax K-3 III Monochrome
- Pentax K2000
- Pentax K200D
- Pentax K-x
- Pentax K-r
- Pentax K-S2
- Pentax K-S1
- Pentax K-01
- Pentax KF2022
- Pentax KP2017
- Samsung GX10
- Samsung GX20
- Samsung GX-1S
- Samsung GX-1L
- Pentax K-12016
- Pentax K-1 II2018
- Pentax K-702016
- KMZ Zenit 122K
- KMZ Zenit 212K
- KMZ Zenit 312K
- KMZ Zenit KM
Where to buy
B&H PhotoAmazonKEH (used)MPB (used)FAQ
What is the Pentax smc Pentax-DA 40mm f/2.8 XS equivalent to on APS-C?
About 60 mm (1.5×) or 64 mm on Canon APS-C (1.6×).
Which cameras is the Pentax smc Pentax-DA 40mm f/2.8 XS compatible with?
It fits Pentax 35mm film: full frame, Pentax *ist DL2, Pentax *ist DL, Pentax *ist DS2, Pentax *ist DS and more (see the full list above).