The Olympus S Zuiko Auto Zoom 28-48mm f/4 is a lens from the Olympus brand. It was built in Japan. It is designed for the SLR cameras of the OM system of the traditional Japanese company. With an adapter it can also be used on digital cameras.
The focal length at one end is 28 mm and at the other end 48 mm. This gives a zoom factor of 1.7, so it covers both the wide-angle range and the standard focal length range. The maximum aperture across the zoom range is f/4. The focus of this model is set manually. The manufacturer lists 65 cm as the closest focusing distance.
The number of elements on the Olympus S Zuiko Auto Zoom 28-48mm f/4 is eight. These are arranged in eight groups and there is a multi-coating of the glass. A 49mm filter lens, such as an IR filter, can be attached in front of the lens. The zoom lens is compactly built, despite the continuous aperture of f/4, so it weighs just 300 grams.
Technical datasheet
| Attribute | Specification |
|---|---|
| Minimal focal length | 28 mm |
| Maximum focal length | 48 mm |
| Zoom factor | 1.7142857142857 |
| Biggest aperture (wide angle) | f/4 |
| Biggest aperture (tele) | f/4 |
| Smallest aperture | f/22 |
| Minimum focus distance | 65 cm |
| Number of elements | 8 |
| Number of groups | 8 |
| Lens coating | Multi Coating |
| Filter thread | 49 mm |
| Weight | 300 g |
| Country of production | Japan |