Olympus OM-1
The Olympus OM-1 is a small picture - SLR (35 mm film), manual focus on the lens. It is the predecessor of other fully mechanical, professional Olympus SLR cameras ( Olympus OM-1 n , Olympus OM-3 ). When it was launched in 1972 , it was considered the lightest SLR camera in the world.
Technical specifications
- Production: 1972 - 1987 by Olympus Optical Co., Japan
- Dimensions: 136 × 83 × 50 mm
- Weight: (housing alone) 510 grams
- Viewfinder: Pentaprism viewfinder, 97% of the negative surface visible; exchangeable adjustment discs
- Exposure times: 1–1 / 1000 second and B
- Closure type: Cloth focal plane closure , running horizontally
- Exposure measurement: purely manual mode (tracking method with open aperture measurement), the exposure measurement with the Olympus OM-1 is done through the lens, via the prism. The result is displayed in the viewfinder through a galvanometer needle in the pentaprism.
- Flash: screw-on flash shoe above the prism ; Synchronous time 1/60 sec .; Synchronous socket can be switched from X to FP.
- Self-timer: mechanical, 4–12 seconds forward
- Film transport: manual or with connected winder (2.5 fps) or motor drive (5 fps), manual film rewind
- Exchangeable rear wall: 250 magazine, Recordataback
- Power supply: mercury button cell 1.35 volts PX625
- Other special features: The flap of the mirror was reduced to a minimum by pneumatic shock absorbers, the mirror can be locked when folded up, ideal for astrophotography, as the shutter is almost vibration-free.
Camera variants
- M-1: This camera already had all the features of the OM1, just not the name. Since Leica also had cameras with the name M in its range and there was fear of confusion, the name was changed to OM 1
- OM-1: Only the name was changed, otherwise identical to the M 1.
- OM-1 MD: This camera had a built-in motor connection. Any normal OM-1 could be upgraded to an OM-1 MD.
- OM-1n: The last version of the OM-1: the motor connection was built into every camera delivered, as a further novelty a flash readiness display was integrated in the viewfinder. That is why the OM-1n was equipped with the same hot shoe as the OM-2n (Shoe 4). However, only two of the three existing contacts are required for operation.
particularities
The handling of the OM-1 differs considerably from cameras from other manufacturers, although it looks very similar to them. The most noticeable difference is that the camera does not have a timing wheel. Instead of the time wheel, the film sensitivity wheel is located on the top of the camera; the times are set on the time ring on the bayonet. This makes it possible to control aperture, distance and time with just one hand without having to take the camera away from your eyes. In order to avoid confusing the time ring and aperture ring of the lens, Olympus relocated the aperture ring to the front tube of the lens for almost all fixed focal lengths. The only exception to the lenses when the system was introduced was the 75-150mm zoom lens. Instead of the release for film rewinding on the camera base, which was customary at the time, Olympus implemented a rotary knob on the front of the camera below the film speed dial. The OM-1 (like all other OM cameras) does not have a dip button. Olympus built this function into the lenses, while other manufacturers built this function into the camera.
