This seamless clamp on gear ring clamps securely around the focus barrel of your lens by tightening one little screw (allen key is included). Once tightened, the slit in the ring disappears and makes the ring seamless. The tooth size is M0,8.
Professional 19mm studio rod adapter for ARRI FF-5 HD and FF-5 Cine follow focus systems. Durable, field-swappable mounting solution for cinema cameras.