SmallRig Φ81-Φ83 Seamless Focus Gear Ring 3296 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 Φ81-Φ83mm lenses and can work with Mini Follow Focus 3010 and other follow focus systems. It makes less noise and no distortion, allowing 360° smooth rotation and precise focus adjustment.