Seamless™ Follow Focus Gear for the Canon EF 14mm f2.8 L Series USM II LensThis gear fits the Canon EF 14mm f 2. 8 L USM II lens. It is designed specifically to fit this lens and is compatible with any standard 0. 8 Module follow focus. It is just tight enough on the lens so it. 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. These gears do not have to be removed after each use although you can if you like. Each gear