he Flexible Drive Shaft from OConnor is a flexible shaft that enables external focus control on your CFF-1 Cine Follow Focus One. The drive shaft is compatible with the 15mm LWS system, as well as with the 15mm & 19mm studio rod systems, allowing the focus puller to work away from the camera. This accessory enables the focus puller and the camera operator to work together while allowing a little elbow room for convenience.