Zoom potentiometer wiring pinout for Canon and Fujinon lens external zoom controllers using TAJIMI connectors

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2005Follow Focus forum

21 years old. Gear and prices may have changed since.

A Canon zoom controller with a TAJIMI 8-pin connector uses pin A for zoom speed control, pins B, C, and D for voltage supplies (V1, V3, V2 respectively), pin E for video return common ground, pin F for video remote switch, pin G for return common ground, and pin H for return switch.
The TAJIMI connector is distinguished by a threaded ring at its end and is used on both Canon and Fuji lens zoom controllers.
Video start and stop function is typically achieved by shorting pins E and F on the TAJIMI connector.

The thread does not provide the complete pinout mapping between the four numbered zoom pot contacts (1, 2, 3, 4) and the TAJIMI connector letters for zoom operation.
Information about Fujinon lens wiring was requested but never provided in the discussion.
The information about Canon pinout came from a faxed document and was not independently verified in the thread.
The specific voltage values for V1, V2, and V3 are not explained.