Olympus OM system#OM-30

The Olympus OM -30, Olympus OM -F in North America is a small SLR ( 35mm film ), with autofocus, but which only works with the special lens " Zuiko Auto- Zoom 1:4 / 35-70 mm Auto Focus".

Specifications

  • Production OM -30: 1983-1987 by Olympus Optical Co., Japan
  • Dimensions: 134 x 85 x 50 mm
  • Weight: (housing only ) 430 grams
  • Viewfinder: pentaprism viewfinder with 93 % viewing area; permanently installed focusing screen with split-image rangefinder and microprism collar, to electronic adjustment aids (LED)
  • Exposure time: 2 - 1/ 1000 s and B.
  • Lock Type: cloth focal plane shutter with timing of about 2 to 1/ 1000 s, horizontally going down. A mirror attenuation is in contrast to the OM 1 and OM- 2 is not present.
  • Exposure Metering: The camera only has an automatic timer. The exposure at the Olympus OM- 30 takes place through the lens ( TTL); when the shutter is open. It is reflected by the secondary mirror, the reference pattern and film light measured ("off the film ," OTF; well "auto dynamic " control called ).
  • Exposure Compensation / - 2 stops in 1/3-stop increments.
  • Flash: Built-in flash shoe firmly on the prism; Sync speed 1/60 sec, no flash control from the camera.
  • Self-timer: Electronically, 12 -second lead, with audible signal.
  • Film transport: manual or with an attached Winder and Motor Drive
  • Power supply: 5 silver oxide button cells ( SR44 )

Special

The OM -30 was the first tentative attempt to bring the OM system in the time of the autofocus. For Olympus supplied from a special lens, the Zuiko Auto- Zoom 1:4 / 35-70 mm autofocus. All other lenses were also available, but without the autofocus. For the electronic rangefinders below the viewfinder image could ( two arrows to indicate the direction in which needs to be focused and a rectangle for correct focus) can be used. At the same time the correct focus can be indicated by a ( disconnectable ) beep. However, the focus indication system requires significantly more power than any other OM - cameras. Three of the five cells are required for the electronic rangefinders. Also of interest was the possibility of sharpness case when a motor drive was recognized. Came the object to be photographed in the focal plane, the camera is automatically released.

Zuiko Auto- Zoom 1:4 / 35-70 mm autofocus

Unlike modern autofocus - lenses, the autofocus unit is installed in the lens in the lens; the light is passed via a beam splitter part to the auto focus module. This requires, however, that the lens is fainter than others. The system was generally not be described at the level of the time because it was very slow and the lens as unwieldy. If the lens as connected to another OM camera OM -30, so it could use the Power Focus mode.

Olympus Corporation Focal-plane shutter Olympus OM-1 Olympus OM-2 Aperture priority Metering mode Hot shoe Olympus OM-3 Olympus OM-4
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