Seamless Follow Focus/Zoom Gear Set for Canon EF 100-400mm f4.5-5.6 L IS USM II Lens
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These focus and zoom gears (1x focus gear & 1x zoom gear) fit the Canon EF 100-400mm f/4.5-5.6 L IS USM II lens.
They’re designed specifically to fit this lens and is compatible with any standard 0.8 Module follow focus. The gear sits 3-8mm “high” off the focus/zoom 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.