Morros DSLR Follow Focus With Gear Ring Belt for DSLR cameras and Camcorders Completely gear-driven design for slip-free, accurate, and repeatable focus movement. Adjustable slide-mounting mechanism to fit large range of lens diameters, including video camera lenses. Industry-standard 15mm lightweight (60mm spacing) rod mount. With quick release clamp. Gear drive can be mounted from both sides for left or right hand use. Made of durable anodized black aluminum and ABS. Compatible with all DSLR cameras, video cameras.