Compur shutter

Compur shutter
A well known German brand of compound shutter.
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Compur shutter - well known German brand of compound shutter.
Concave lens - see Bi-concave lens.
Condenser - optical system which concentrates light rays from a wide source into a narrow beam. Condensers are used in spotlights and enlargers.

The first Compur shutters were dial set. This means that the speed setting is by way a rotating dial at the top of the shutter plate. The later models were rim set, with a speed setting rim around the shutter housing.

1 - 1/500 + B Compur Shutter. X (normal) and M (flashbulb) flash sync. V selftimer position.
More data at Schneider Optics and here.
Shutter: 1 - 1/500 second plus bulb. X Flash sync to 1/500 second.

As to the difference between a Copal and a Compur shutter: Compur has 1/3rd step click stops on the aperture, Copal has none. Compur has a stop at the end of the aperture scale, Copal does not.

See also: Shutter, Compur, Camera, View, Finder