The Olympus Zuiko Auto-T 400mm f/6.3 is a lens from the Olympus brand. It is designed for the OM system. It was introduced in the early 1970s together with the OM-1.
The focal length of the fixed focal length is 400mm. This makes it part of the super telephoto lens group. The largest selectable aperture is f/6.3. f/32 can be set as the smallest aperture. The focus on this model has to be set manually. 500 cm distance must be kept for a sharp subject.
The Olympus Zuiko Auto-T 400mm f/6.3 is composed of 5 elements in 5 groups. Filters with a diameter of 72 can be used with the lens. At f/6.3, it is not particularly fast, but it is also a bit more compact with an overall length of only 25.5 cm. The weight specification for the lens is 1300 grams.
The full-frame lens can also be used with modern digital cameras. An additional adapter is needed for this. From the respective lens mount to the OM bayonet.
Technical datasheet
| Attribute | Specification |
|---|---|
| Biggest aperture | f/6.3 |
| Smallest aperture | f/32 |
| Minimum focus distance | 500 cm |
| Number of elements | 5 |
| Number of groups | 5 |
| Filter thread | 72 mm |
| Weight | 1300 g |
| Country of production | Japan |