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.
The ARRI Follow Focus FF-4 Set is a precision-engineered studio tool for cine lenses, featuring a 2:1 gear ratio for reliable, professional focus pulling.
Professional ARRI FF-4 Studio Follow Focus set for 19mm rods. Features a 2:1 gear ratio for precise control with high-end cine lenses. Sturdy and reliable.