Transform any of your lenses into cinema-ready optics with this large Lens Gear from ZEISS. Designed to slide onto lenses measuring 86-93mm in diameter, this ring allows you to easily equip a lens with an industry-standard 0.8 MOD gear that will enable to use of a follow focus system for smooth, deliberate focus pulls.It attaches quickly and without the use of any tools thanks to a twist-tightening mechanism. A rubber-covered GumGum is included as well, which can allow users to fit the gear on smaller diameter lenses measuring 84-91mm in addition to protecting the lens' focusing ring from scratches and other damage. Additionally, this piece of equipment is very durable, featuring a lightweight aluminum construction with a hardened surface coating.