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Olympus Auto Bellows, OM Mount

Olympus Cameras
KEH Model# 239641

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Olympus Auto Bellows, OM Mount Description


The Auto Bellows is placed between the OM body and lens to provide the lens extension required in close-up and macrophotographic work. With the double cable release, the diaphragm automatically stops down to the pre-selected aperture at the moment of exposure. The pre-set lever enables you to view the depth of field prior to taking the picture. Since macrophotographs at magnifications greater than 1:1 should be taken with the lens reversed, the Auto Bellows provides a removable lens mounting board. This enables you to reverse the lens without removing the lens from the lens board by extra convenience.

KEH Specifications

  • Camera Compatibility: Olympus OM System Camera bodies
  • Lens Mount: Olympus OM-mount bayonet (rotation angle 70-degrees)
  • Focusing: Adjustable by focusing knob on the focusing stage with locking device
  • Automatic Stop-Down Exposure: Diaphragm linked with shutter by double cable release
  • Pre-set Lever: Stops diaphragm down to pre-set aperture for previewing depth of field
  • Lens Reverse Mounting: Lens and camera mount boards are detachable providing quick reversing of lens
  • Focusing Tripod: With provision for mounting on a tripod or on the Macrophoto Stand B adapter
  • Focusing Stage: With bellows removed, focusing rail can be mounted
  • Bellows Extension Range: 36-198mm (with lens in normal position); 56-218mm (with lens in reversed position); graduated focusing rail is 180mm long
  • Maximum Extension: 198 mm
  • Diaphragm Coupling: Automatic (with double cable release)
  • Date Introduced: 1972
  • Dimensions: 74 x 132 x 240mm / 2-15/16 x 5-3/16 x 9-3/8"
  • Weight: 930 g / 32.75 oz.


General information

Brand Name Olympus
Manufacturer Part Number 104100
Manufacture GTIN 0050332853102
Product information
Additional Information
  • The center of Olympus's vaersatile extension system for macro and close-up photography
  • Usable with the various units of the OM system in wide range of applications
  • Mounts easily to macro stand, copy stand or tripod
  • Wide
Product Model
Olympus OM System

Physical Characteristics

Lens Mount Olympus OM