The Yongnuo 25mm f/1.7 II is a 25 mm prime lens with a maximum aperture of f/1.7 for the Micro 4/3 mount. Here are its field of view on different sensors, hyperfocal distances and the cameras it fits.
Focal length
25 mm
Max aperture
f/1.7
Mount
Micro 4/3
Designed for
2.00× crop
Field of view by sensor
| Sensor | Diagonal angle of view | 35 mm equivalent |
|---|---|---|
| Canon APS-C (1.6×) | 56.8° | 40 mm |
| Micro Four Thirds | 46.8° | 50 mm |
Hyperfocal distance
| Focal length | f/2.8 | f/5.6 | f/8 | f/11 | f/16 |
|---|---|---|---|---|---|
| 25 mm | 15 m | 7.5 m | 5.2 m | 3.8 m | 2.6 m |
Circle of confusion 0.015 mm (sensor size the lens is designed for).
Where to buy
B&H PhotoAmazonKEH (used)MPB (used)FAQ
What is the Yongnuo 25mm f/1.7 II equivalent to on APS-C?
It is designed for a 2.00× sensor, giving a full-frame equivalent of 50 mm.