Olympus OM-1

The Olympus OM -1 is a small SLR ( 35mm film), with manual focus on the lens. It is the predecessor of Olympus OM -2 and other previous professional Olympus SLR cameras. (Olympus OM- 2SP, Olympus OM -3, Olympus OM -4, OM- 4Ti ). At its launch in 1972, it was regarded as the lightest SLR camera in the world.

Specifications

  • Production: 1972-1987 by Olympus Optical Co., Japan
  • Dimensions: 136 × 83 × 50 mm
  • Weight: (housing only ) 510 grams
  • Viewfinder: pentaprism viewfinder, 97 % of the negative surface visible; interchangeable focusing screens
  • Exposure times: 1-1/1000 sec and B
  • Lock Type: cloth focal plane shutter, horizontal descending
  • Exposure Metering: purely manual mode ( Nachführmethode with aperture metering ) Exposure metering with the Olympus OM- 1 takes place through the lens, through the prism. By means of a galvanometer in the pentaprism, the result appears in the viewfinder.
  • Flash: bolt-on hot shoe on the prism; Sync speed 1/60 sec.; Sync socket of X on FP switchable.
  • Self-timer: mechanical, 4-12 Second Advance
  • Film transport: manual or with an attached Winder ( 2.5 fps) or Motor Drive (5 fps), film rewind manually
  • Replaceable rear panel: 250 Magazine, Recordataback
  • Power supply: mercury button cell 1.35V PX625
  • Other special features: The mirror slap was reduced by pneumatic shock absorber at a minimum, the mirror is raised lockable, ideal for astrophotography because of the closure runs virtually vibration -free.

Camera variants

  • M -1: This camera had all the features of OM1, just not the name. Since Leica cameras had also named M in the range and it was feared confusion, the name was changed to OM 1
  • OM -1: It has changed only the name, otherwise identical to the M 1.
  • OM- 1 MD: This camera had a built-in motor connection. Each normal OM- 1 could be upgraded to an OM- 1 MD.
  • OM -1n: The latest version of the OM -1: the motor connection was installed at each camera delivered, as a further novelty flash ready indicator in viewfinder has been integrated. Therefore, the OM -1n was equipped with the same hot shoe like the OM -2n ( Shoe 4 ). However, only two of the three existing contacts for the operation are needed.

Special

The OM- 1 is different in handling some cases considerably by cameras from other manufacturers, although they look very similar to them. The most striking difference is that the camera has no shutter speed dial. Instead of Zeitenrads the wheel for the film speed can be found on top of the camera, the times are set at the time on the bayonet ring. Thus, it is possible to control with just one hand aperture, distance and time, without having to remove the camera from the eye. In order to prevent a confusion of time ring and aperture ring on the lens, Olympus moved in almost all fixed focal length the aperture ring on the front barrel of the lens. The only exception with the lenses in the Systemeinfürung was the zoom lens 75 -150mm. Instead of the then customary for the film rewind release button of the camera, Olympus realized a rotary knob on the front of the camera below the film speed wheel. The OM -1 (as well as all other OM cameras) has no preview button. Olympus built this feature into the lenses, while other manufacturers integrated this feature into the camera.

Olympus Corporation Focal-plane shutter Metering mode Olympus OM-3 Olympus OM-4 Olympus OM system#OM-30
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