The Olympus OM-10 was introduced in 1979 as the first camera in Olympus OM "two digit" series. It became one of the most popular Olympus models. As a basic consumer model it has only the Aperture-priority Automatic Exposure but still it is able to take advantage of the whole (almost) Olympus System accessories. The manual-exposure adapter for it was provided as an option. 

There is adapter on this dial, that makes it possible to set shutter speeds 1 sec. to 1/1000 sec. Without the manual adapter it only works in aperture priority mode. The maximum shutter speed is 1/1000th and the maximum film speed is ASA 1600 . OM-10 does not support TTL dedicated flash but it can work dedicated auto, with the light reading being done on the flash. As its "big brothers" the single number OM cameras it has proved to be a reliable instrument even in the hands of the serious amateur.

Film Format : 24mm x 36mm 
Type: :TTL auto-exposure 35mm SLR camera 
Lens mount : OLYMPUS OM Mount. About 50 different Zuiko interchangeable lenses. 
Shutter : Electronically controlled cloth focal plane shutter. Manual exposure: B, 1 - 1/1,000 sec. with adapter.
Synchronization : X type contact, hot shoe.
Automatic exposure control : Aperture preferred automatic exposure control electronic shutter type. TTL Direct Light Measuring System, center-weighted average light measurement. Measuring range: ASA 100 from F1.2, about 60 seconds to F16, 1/1,000 second.
Programmed Automatic Exposure : TTL direct, measuring range : approximate. -5 EV ~ 18 EV , 50mm F 1.4 
Manual exposure : With a Manual Adapter 
Self timer : 15sec. delay 
Metering system : Olympus direct metering in body. Full aperture center weighted metering. 
Measuring range : EV1.5 - EV17 (ASA 100 with F 1.2 standard lens). 
Film speed Setting : ASA 12 - 3200