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 Motor Follow Focus AKFII Brushless Motor Follow Focus Ring Kit for AK2000 AK4000 AK Series DSLR Stabilizer Gimbal - AliExpress