The Schneider-Kreuznach Curtagon 35mm f/4 is a 35 mm prime lens with a maximum aperture of f/4 for the M42 mount. Here are its field of view on different sensors, hyperfocal distances, Milky Way exposure limits and the cameras it fits.
Focal length
35 mm
Max aperture
f/4
Mount
M42
Designed for
Full frame
Field of view by sensor
| Sensor | Diagonal angle of view | 35 mm equivalent |
|---|---|---|
| Full frame | 63.4° | 35 mm |
| APS-C (1.5×) | 44.0° | 54 mm |
| Canon APS-C (1.6×) | 42.2° | 56 mm |
| Micro Four Thirds | 34.3° | 70 mm |
Hyperfocal distance
| Focal length | f/5.6 | f/8 | f/11 | f/16 |
|---|---|---|---|---|
| 35 mm | 7.3 m | 5.1 m | 3.7 m | 2.6 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) | 9.1 s @ f/4 | 14.3 s |
| Full frame (45 MP) | 7.8 s @ f/4 | 14.3 s |
| APS-C (24 MP) | 7.3 s @ f/4 | 9.3 s |
Cameras that fit (2)
Where to buy
B&H PhotoAmazonKEH (used)MPB (used)FAQ
What is the Schneider-Kreuznach Curtagon 35mm f/4 equivalent to on APS-C?
About 52 mm (1.5×) or 56 mm on Canon APS-C (1.6×).
Which cameras is the Schneider-Kreuznach Curtagon 35mm f/4 compatible with?
It fits KMZ Zenit 122, KMZ Zenit 412LS (see the full list above).