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 ARRI CLM-4 lens gear with m0.8/32p pitch and 50 teeth. Compatible with ARRI/Zeiss, Panavision, and Fujifilm PL lenses. Includes metal flange.