The AR-4 and AR-7 Double Cable Release and the AR-10 Cable Release provide the PB-6 with automatic diaphragm control, even for a lens in the reversed position.

The AR-10 is a Double Cable Release for all cameras that use an electrical 2-pin cable release.

The AR-10 provides the PB-6 with automatic diaphragm control between the camera and the bellows focusing attachment PB-6 release plug; even for a lens in the reversed position.

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