Get smooth focus pulls by attaching the Zeiss Lens Gear on your 62–69mm diameter lenses. With this gear, you can easily use an industry-standard 0.8 mod gear with your lens. The twist-tightening mechanism makes the gear easy to install, without any need of additional tools. Moreover, the included GumGum rubber cover makes it possible to use the gear with lenses of 60–67mm diameter. The rubber cover also prevents scratches on the filter ring. The lens gear is made of aluminum and has a hardened surface coating to ensure durability.