Bolex instructions control variable shutter rx-fader . Available to purchase for immediate download. Below is an extract from the manual converted to text for a quick impression on the content. Bolex instructions control variable shutter rx-faderOperating Instructions for the automatic control of the variable shutter RX-FADER tor the BOLEX H8 REFLEX camera 7. Loosen the screw (3). 8. Push levers (4) and (5) up against their top stops. 9. Insert the end of the spring-loaded bar(6) into the knob of the lever (4) ; then tighten and lock the screw. 8. OPERATION The RX-fader accessory uses the motor of the camera to open or close the variable shutter. The number of frames making up a fade-in or a fade-out is invariably 32 whatever the filming Speed chosen. Once the camera is started, simply press down Iever(7) to control the operation of the Rx-fader. When lever (7) is pushed down (shutter closed), arm (5) comes down to engage lever(4) of the variable shutter to which it is connected by the small rod (8) and the spring-loaded bar(6). Simply push lever (7) up (shutter open) to get the reverse operation.