The Olympus OM1 is a fully manual 35mm film SLR camera manufactured by Olympus. Yes, that means manual exposure and manual focus, manual film advance and manual film rewind. Everything about the camera is mechanical, except the light meter, which the camera works fine without. Both the Camera bodies and the Zuiko Lenses are made in Japan and are built to a very high standard.
Model Olympus OM-1
Release date 1972
Lens mount Olympus OM Mount, bayonet type
Dimensions 136 x 83 x 50 mm
Weight 510g
Shutter speed 1/1000s – 1s, Bulb mode
Flash sync speed 1/60s
ISO range ISO 25-1600
Battery 1.35-volt mercury battery
View finder 0.92x
Self-Timer Approx. 4-12 second delay lever type