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QBM

Lens mount for Rolleiflex SL35 cameras From Wikipedia, the free encyclopedia

QBM
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The Quick Bayonet Mount (QBM) is the bayonet mount system for the range of interchangeable lenses fitted to 135 film cameras built by Rollei in Germany and Singapore from 1970 through 1990, including the Rolleiflex SL35, Rolleiflex SL2000F, and Voigtländer VSL series. Lens brands sold with QBM included Carl Zeiss, Rolleinar, Schneider, and Voigtländer. QBM has a flange focal distance of 44.5 mm.

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Technical

The aperture ring should be set to its maximum position (smallest f/-number) before mounting on the camera. The depth-of-field preview should not be engaged during the mounting/dismounting process.[1]:30

List of QBM lenses

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Notes
  1. Part of the Rolleinar RS series, which were available in multiple mounts, including QBM, Canon FD, Minolta SR, Pentax K, Nikon F, and Olympus OM.
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References

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