2023From a Facebook group: The Steadicam Group
Eliminating zoom creep on a Canon CINE-SERVO 17-120 mm T2.95-3.9 PL lens with G-Zoom controller
What the thread found
- Zoom creep occurs only when the G-Zoom controller is connected, while focus remains unaffected, indicating a calibration issue in the zoom servo rather than the lens itself.
- The G-Zoom controller has a centering potentiometer located on the side beneath a small cover, adjustable with a small slotted screwdriver to eliminate drift at any zoom position.
- Finding the potentiometer null point is easier when testing at the fastest zoom speed.
- Engaging U-Mode in the lens servo unit resolved zoom creep in one operator's case.
- If the problem persists after potentiometer adjustment, contact the G-Zoom manufacturer for further support.
Depends on
- The remedy depends on whether zoom creep occurs only with the G-Zoom connected or is inherent to the lens servo.
- Potentiometer adjustment may need to be repeated under different operating temperatures or after extended use.