FeiyuTech Follow Focus Brushless Motor Kit. Lens Control System Compatible with AK2000S. AK2000C. AK2000. AK4000 and AK4500 Camera Gimbal. Lens Zoom Control for DSLRs/Mirrorless Cameras: Amazon.de: Electronics & Photo
FeiyuTech AK Series Follow Focus I
Feiyutech Motor Follow Focus Akfii Brushless Motor Follow Focus Ring Kit For Ak2000 Ak4000 Ak Series Dslr Stabilizer Gimbal - Handheld Gimbal Accessories - AliExpress