The Olympus Zuiko Auto-W 21mm f/2 is a lens. The production facility was located in Japan. The lens can be connected to cameras with Olympus OM mount. It was introduced in 1978.
The manufacturer specifies the focal length as 21mm. Thus, it is part of the group of wide-angle lenses. f/2 is the largest aperture of the fixed focal length. The smallest aperture is f/16. The focus setting is made manually on this model. 20 cm distance is required for a sharp subject.
The number of elements of the Olympus Zuiko Auto-W 21mm f/2 is eleven. These are arranged in new groups. A 55mm filter lens, such as a UV filter, can be attached in front of the lens.
The weight specification for the lens is 250 grams. Despite its high speed, it has thus been built very light and compact.
With an adapter, the lens can also be used on digital cameras. For example, it can be used on a Canon EOS DSLR.
For a long time it was the fastest 21 mm lens. The number 1 spot is now occupied by the Leica Summilux-M 21mm f/1.4 ASPH.
Technical datasheet
| Attribute | Specification |
|---|---|
| Biggest aperture | f/2 |
| Smallest aperture | f/16 |
| Minimum focus distance | 20 cm |
| Number of elements | 11 |
| Number of groups | 9 |
| Filter thread | 55 mm |
| Weight | 250 g |
| Country of production | Japan |