Seamless™ Follow Focus Gear for Canon FL 85mm f1.8 LensThis gear fits the Canon FL 85mm f 1. 8 Lens (not for FD model) Its specially designed to fit this lens and is compatible with any standard 0. 8 Module follow focus unit. Focus gears are generally low profile and sit about 3 6mm high" The gear sits 3 6mm high off the focus ring of your lens for a clean, low profile gear that slides smoothly onto your lens and into your current lens case. Custom spec gears can be made on request. The gears do not have