Quick answer
The Yongnuo 25mm f/1.7 II is a wide-angle prime lens covering 25mm at f/1.7 for the Micro Four Thirds mount. Its fast maximum aperture helps in dim light and gives good subject separation.
About this lens
The Yongnuo 25mm f/1.7 II is a fast wide-angle prime lens covering 25mm at f/1.7 for Micro Four Thirds mount cameras. The wide view suits landscapes, architecture and environmental shots.
Yongnuo 25mm f/1.7 II specifications
- Brand
- Yongnuo
- Mount
- Micro Four Thirds
- Focal length
- 25mm
- Maximum aperture
- f/1.7
- Lens type
- Prime
What can you shoot with the Yongnuo 25mm f/1.7 II?
At 25mm this is a wide-angle prime, which typically suits:
- Landscapes and cityscapes
- Street and travel photography
- Environmental portraits and interiors
Its fast maximum aperture helps in dim light and gives good subject separation.
Full-frame equivalent and field of view
Calculated from the focal length and crop factor. Not measured.
| Sensor | Crop | Equivalent | Horizontal FOV | Diagonal FOV |
|---|---|---|---|---|
| Micro Four Thirds | 2.0x | 50mm | 39.6° | 46.8° |
Frequently asked questions
What mount does the Yongnuo 25mm f/1.7 II use?
It uses the Micro Four Thirds mount, so it fits Micro Four Thirds cameras directly.
What is the focal length of the Yongnuo 25mm f/1.7 II?
It is a fixed 25mm lens with a maximum aperture of f/1.7. That makes it a wide-angle lens.
Is the Yongnuo 25mm f/1.7 II a prime or a zoom lens?
It is a prime lens with a fixed 25mm focal length. Primes usually open wider than zooms; this one opens to f/1.7.
What is the Yongnuo 25mm f/1.7 II equivalent on a crop sensor?
On Micro Four Thirds (2x crop) it frames like 50mm on full frame, with a 39.6° horizontal and 46.8° diagonal field of view. These figures are calculated from the focal length and crop factor.
Which cameras does the Yongnuo 25mm f/1.7 II fit?
Any Micro Four Thirds-mount camera, including OM System OM-1, OM System OM-1 Mark II, OM System OM-5, Olympus OM-D E-M1, and Olympus OM-D E-M1 Mark II and 24 more.
Alternatives for Micro Four Thirds from other brands
All Micro Four Thirds lensesSame mount, overlapping focal range, closest maximum aperture first.
