SmallRig Φ62.5-Φ64.5 Seamless Focus Gear Ring 3291 is designed to fit lenses for precise and stable focal length adjustment. Features standard 0.8 MOD and made by elastic material, suits lens seamlessly and evenly. The ring is compatible with Φ62.5-Φ64.5mm lenses and can work with Mini Follow Focus 3010 and other follow focus systems. It makes less noise and no distortion, allowing 360º smooth rotation and precise focus adjustment.