This listing is for a seamless focus gear that's designed to fit the Canon EF 70-200mm f4L IS USM lens. 

The gears are designed specifically to fit this lens and is compatible with any standard 0.8 Module follow focus. The gear is made to the exact size of the focus ring of the lens, just tight enough to turn the focus ring without slipping so there is no need for straps, buckles, or clamps and you can take advantage of all 360º of the focus gear. The gears are rigid and sit 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, saving you valuable time when assembling or breaking down  your rig. 

Each gear comes with a lifetime of support and should last the lifetime of the lens. If your gear doesn't fit properly or you are unhappy with your new lens gear for any reason, we offer free modifications, exchanges, or a full refund if you're really not happy with your new Seamless Follow Focus Gear.