Compatible with a range or flexible cmotion fastening tools, knob solo can be mounted to a pan-bar for camera operator control, a lens support rod as a traditional follow focus, or just about anywhere on or around the camera. 

The knob solo can set the direction of the assigned motor and is switchable between focus, iris or zoom control. A single button allows the operator to set digital lens limits where the full rotation of the knob can control a user defined range on the lens. 

In addition, the advanced knob offers mechanical limits, mechanical stop lock, internal torque adjustment and LED marker illumination.