The Cosina Cosinon-W 28mm 1:2.8 is a 28 mm prime lens for the Pentax K mount. Here are its field of view on different sensors, hyperfocal distances and the cameras it fits.
Focal length
28 mm
Max aperture
—
Mount
Pentax K
Designed for
1.53× crop
Field of view by sensor
| Sensor | Diagonal angle of view | 35 mm equivalent |
|---|---|---|
| APS-C (1.5×) | 53.6° | 43 mm |
| Canon APS-C (1.6×) | 51.6° | 45 mm |
| Micro Four Thirds | 42.2° | 56 mm |
Hyperfocal distance
| Focal length | f/2.8 | f/5.6 | f/8 | f/11 | f/16 |
|---|---|---|---|---|---|
| 28 mm | 14 m | 7.2 m | 5.0 m | 3.7 m | 2.5 m |
Circle of confusion 0.020 mm (sensor size the lens is designed for).
Cameras that fit (43)
- KMZ Zenit 122K
- KMZ Zenit 212K
- KMZ Zenit 312K
- KMZ Zenit KM
- 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
Where to buy
B&H PhotoAmazonKEH (used)MPB (used)FAQ
What is the Cosina Cosinon-W 28mm 1:2.8 equivalent to on APS-C?
It is designed for a 1.53× sensor, giving a full-frame equivalent of 43 mm.
Which cameras is the Cosina Cosinon-W 28mm 1:2.8 compatible with?
It fits KMZ Zenit 122K, KMZ Zenit 212K, KMZ Zenit 312K, KMZ Zenit KM, Pentax 35mm film: full frame and more (see the full list above).