The Contax Zeiss 21mm f/2.8 Distagon is a 21 mm prime lens with a maximum aperture of f/2.8 for the Contax/Yashica mount. Here are its field of view on different sensors, hyperfocal distances, Milky Way exposure limits and the cameras it fits.
Focal length
21 mm
Max aperture
f/2.8
Mount
Contax/Yashica
Designed for
Full frame
Field of view by sensor
| Sensor | Diagonal angle of view | 35 mm equivalent |
|---|---|---|
| Full frame | 91.7° | 21 mm |
| APS-C (1.5×) | 67.9° | 32 mm |
| Canon APS-C (1.6×) | 65.6° | 34 mm |
| Micro Four Thirds | 54.5° | 42 mm |
Hyperfocal distance
| Focal length | f/2.8 | f/5.6 | f/8 | f/11 | f/16 |
|---|---|---|---|---|---|
| 21 mm | 5.3 m | 2.6 m | 1.9 m | 1.4 m | 0.9 m |
Circle of confusion 0.030 mm (sensor size the lens is designed for).
Longest exposure for sharp stars
| Camera | NPF rule (wide open) | 500 rule |
|---|---|---|
| Full frame (24 MP) | 13.1 s @ f/2.8 | 23.8 s |
| Full frame (45 MP) | 11.0 s @ f/2.8 | 23.8 s |
| APS-C (24 MP) | 10.2 s @ f/2.8 | 15.6 s |
Cameras that fit (1)
Where to buy
B&H PhotoAmazonKEH (used)MPB (used)FAQ
What is the Contax Zeiss 21mm f/2.8 Distagon equivalent to on APS-C?
About 32 mm (1.5×) or 34 mm on Canon APS-C (1.6×).
Which cameras is the Contax Zeiss 21mm f/2.8 Distagon compatible with?
It fits Contax 35mm film: full frame (see the full list above).