Great how to video showing the Jag35 wireless electronic follow focus kit, setting up and fine tuning.
The Jag35 WEFF is a Wireless Electronic Follow Focus System consisting of a wireless handheld remote and a 15mm rod-mountable receiver.
The Jag35 WEFF is a Wireless Electronic Follow Focus System consisting of a wireless handheld remote and a 15mm rod-mountable receiver. The unit is designed to provide cinematographers with precise and comprehensive remote focus control on the main channel and zoom or iris control on channel 2. With a range of 1000 feet the WEFF uses 2.4 GHZ technology. It also has adjustable end stops that allow the use of Manual Still lenses with Hard stops (additional 32 pitch lens gear needed) and Cine style lenses. The handheld Controller uses a canon or third party LP-e6 battery, Receiver uses 6-8V via a 2.1mm coax connector. Motor cables use commonly found 3.5mm phono connectors.
For more see the guys over at Jag35.