What the thread found

• A wired remote focus control system was developed with a motor delivering 15 kg/cm torque and 240 degrees of gear rotation, powered by six AA batteries and offering four programmable focus positions.
• The system was designed to work with cinema lenses and DSLR cameras with limited motor rotation ranges.
• The motor operates with significant noise, which was identified as a limitation requiring future redesign.
• The wired version was priced at approximately 700 US dollars, while a radio-controlled variant was planned for around 950 US dollars.
• The system included features such as gear-limit calibration, speed adjustment, battery low-voltage indication, and manual operation capability.
• Target users for this low-cost follow focus system included independent filmmakers, television operators, music video production, sports broadcasting, and educational institutions with limited budgets.

Depends on

• The motor was notably large and produced excessive noise during operation.
• The control cable length was limited to 5 meters, though it could be extended using standard XLR microphone cables.
• Motor rotation was constrained to 240 degrees.
• Development status as of 2010 indicated the radio-controlled version and low-noise motor redesign were still in progress or planned for future delivery.

Parts

Follow Focus

Same gear or parts

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