The Olympus Auto-S 50mm f/1.8 is a lens from the Olympus brand. Japan is the manufacturing country from where the lens for the OM system comes from. Two versions were manufactured. This article refers to the second version (F.Zuiko MC Auto-S f/1.8/50mm).
The fixed focal length comes with a focal length of 50 mm. You can classify the Olympus Auto-S 50mm f/1.8 in the group of standard lenses. The fixed focal length has a maximum aperture of f/1.8. The smallest aperture is f/16. This model does not have an autofocus. The focus is set manually. The manufacturer states 45 cm as the closest focusing distance.
The lens has an Olympus OM mount. SLR cameras with this mount can be used with it. Via an adapter, it is also possible to use it with a modern digital camera, which of course does not require film. If it is a full-frame camera, the lens is of course equivalent to a modern 50mm lens. If it is a crop sensor, the crop factor is added depending on the size.
The number of lens elements on the Olympus Auto-S 50mm f/1.8 is six. These are arranged in four groups. A 49mm filter lens, such as a color filter, can be attached in front of the lens. The weight is specified at 165 grams. With an overall length of around 3.2 cm, it is quite compact.
