Seamless™ Follow Focus Gear for Nikon Nikkor - S 35mm f2.8 LensThis gear fits the Nikon Nikkor S 35mm f 2. 8 lens. It is designed specifically to fit this lens and is compatible with any standard 0. 8 Module follow focus. 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. The gears do not have to be removed after each use although you can if you like. Each gear comes with a lifetime of support. This gear is