The Fotasy M3517 35mm f/1.7 is a 35 mm prime lens with a maximum aperture of f/1.7 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/1.7
Mount
M42
Designed for
1.53× crop
Field of view by sensor
| Sensor | Diagonal angle of view | 35 mm equivalent |
|---|---|---|
| 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/2.8 | f/5.6 | f/8 | f/11 | f/16 |
|---|---|---|---|---|---|
| 35 mm | 22 m | 11 m | 7.8 m | 5.7 m | 3.9 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) | 5.0 s @ f/1.7 | 9.3 s |
Cameras that fit (2)
Where to buy
B&H PhotoAmazonKEH (used)MPB (used)FAQ
What is the Fotasy M3517 35mm f/1.7 equivalent to on APS-C?
It is designed for a 1.53× sensor, giving a full-frame equivalent of 54 mm.
Which cameras is the Fotasy M3517 35mm f/1.7 compatible with?
It fits KMZ Zenit 122, KMZ Zenit 412LS (see the full list above).