High accuracy magnetic induction rotary knob can control the follow focus and zoom, ensures easy real-time tracking in hand speed, high sped, low speed, rapid response, smart size, mountable by various DSLR lens.
The brushless and high accuracy chip can precisely controls the motor rotation and brings you the unexpected smooth experience. Premium accuracy, gives you real-time display of zoom. The auto-zoom function will lead you to create more fun. Can be installed on hot shoe seat or fixed on extension plate of stabilizer.