Quick answer
The Vivitar 20mm f/3.8 Wide Angle is a ultra-wide prime lens covering 20mm at f/3.8 for the Olympus OM mount. Its moderate maximum aperture works best in good light or with a higher ISO.
About this lens
This 20mm f/3.8 manual-focus wide-angle prime lens from Vivitar fits Olympus OM mount cameras. The wide view suits landscapes, architecture and environmental shots.
Vivitar 20mm f/3.8 Wide Angle specifications
- Brand
- Vivitar
- Mount
- Olympus OM
- Focal length
- 20mm
- Maximum aperture
- f/3.8
- Lens type
- Prime
What can you shoot with the Vivitar 20mm f/3.8 Wide Angle?
At 20mm this is a ultra-wide prime, which typically suits:
- Landscapes and big skies
- Architecture and interiors
- Astrophotography and night skies
Its moderate maximum aperture works best in good light or with a higher ISO.
Full-frame equivalent and field of view
Calculated from the focal length and crop factor (adapted mount, so sensor size depends on your camera). Not measured.
| Sensor | Crop | Equivalent | Horizontal FOV | Diagonal FOV |
|---|---|---|---|---|
| Full frame | 1.0x | 20mm | 84° | 94.5° |
| APS-C | 1.5x | 30mm | 61.9° | 71.6° |
| Micro Four Thirds | 2.0x | 40mm | 48.5° | 56.8° |
Frequently asked questions
What mount does the Vivitar 20mm f/3.8 Wide Angle use?
It uses the Olympus OM mount, so it fits Olympus OM cameras directly and can be used on other systems through a mount adapter.
What is the focal length of the Vivitar 20mm f/3.8 Wide Angle?
It is a fixed 20mm lens with a maximum aperture of f/3.8. That makes it a ultra-wide lens.
Is the Vivitar 20mm f/3.8 Wide Angle a prime or a zoom lens?
It is a prime lens with a fixed 20mm focal length. Primes usually open wider than zooms; this one opens to f/3.8.
What is the Vivitar 20mm f/3.8 Wide Angle equivalent on a crop sensor?
On APS-C (1.5x crop) it frames like 30mm on full frame, with a 61.9° horizontal and 71.6° diagonal field of view. On Micro Four Thirds (2x crop) it frames like 40mm on full frame, with a 48.5° horizontal and 56.8° diagonal field of view. These figures are calculated from the focal length and crop factor.
