The Konica Minolta KM 20mm f/2.8 is a 20 mm prime lens with a maximum aperture of f/2.8 for the Minolta AF mount. Here are its field of view on different sensors, hyperfocal distances, Milky Way exposure limits and the cameras it fits.
Focal length
20 mm
Max aperture
f/2.8
Mount
Minolta AF
Designed for
1.53× crop
Field of view by sensor
| Sensor | Diagonal angle of view | 35 mm equivalent |
|---|---|---|
| APS-C (1.5×) | 70.5° | 31 mm |
| Canon APS-C (1.6×) | 68.1° | 32 mm |
| Micro Four Thirds | 56.8° | 40 mm |
Hyperfocal distance
| Focal length | f/2.8 | f/5.6 | f/8 | f/11 | f/16 |
|---|---|---|---|---|---|
| 20 mm | 7.3 m | 3.7 m | 2.6 m | 1.9 m | 1.3 m |
Circle of confusion 0.020 mm (sensor size the lens is designed for).
Longest exposure for sharp stars
| Camera | NPF rule (wide open) | 500 rule |
|---|---|---|
| APS-C (24 MP) | 10.8 s @ f/2.8 | 16.3 s |
Cameras that fit (34)
- Konica Minolta Maxxum 5D
- Konica Minolta Dynax 5D
- Konica Minolta Maxxum 7D
- Konica Minolta Dynax 7D
- Sony Alpha 33
- Sony Alpha 35
- Sony Alpha 37
- Sony Alpha 55
- Sony Alpha 57
- Sony Alpha 58
- Sony Alpha 65
- Sony Alpha 68
- Sony Alpha 77
- Sony Alpha 77 II2014
- Sony Alpha 992012
- Sony Alpha 99V
- Sony Alpha 100
- Sony Alpha 200
- Sony Alpha 230
- Sony Alpha 290
- Sony Alpha 300
- Sony Alpha 330
- Sony Alpha 350
- Sony Alpha 380
- Sony Alpha 390
- Sony Alpha 450
- Sony Alpha 500
- Sony Alpha 550
- Sony Alpha 560
- Sony Alpha 580
- Sony Alpha 700
- Sony Alpha 8502009
- Sony Alpha 9002008
- Sony Alpha 99 II2016
Where to buy
B&H PhotoAmazonKEH (used)MPB (used)FAQ
What is the Konica Minolta KM 20mm f/2.8 equivalent to on APS-C?
It is designed for a 1.53× sensor, giving a full-frame equivalent of 31 mm.
Which cameras is the Konica Minolta KM 20mm f/2.8 compatible with?
It fits Konica Minolta Maxxum 5D, Konica Minolta Dynax 5D, Konica Minolta Maxxum 7D, Konica Minolta Dynax 7D, Sony Alpha 33 and more (see the full list above).