The SC-745 Shutter Controller is used to externally vary the shutter speed for the TM-745E/765E and TM-7EX/6EX cameras. The controller plugs into the 6-pin connector on the rear of the cameras normally used for auto iris lenses. Switches on the controller are used to set the desired shutter speed. See the key to controller speeds on the associated data sheet for the camera being shuttered.
The SC-745 must remain attached to the camera to use the shutter feature unless the camera is specially modified internally for shuttering. To use the SC-745 and an auto iris lens at the same time, a separate 6-pin connector must be made up which breaks out the SC-745 and lens connections as separate outputs.