Factors to Consider When Choosing Camera Lens Motor

Torque output 
The larger the focal length of the lens, the greater the mass of the moving lens, and the greater the required torque output. Need to choose the appropriate size of motor torque. 
Response speed 
Require a quick response to focus action, select a motor with a short response time. Generally choose stepper motor or brushless DC motor. 
Operating voltage 
The operating voltage of the motor needs to match the supply voltage of the camera system. Typically 3.3V, 5V or 12V. 
Size and weight 
Choose a miniaturized motor that matches the size and weight of the lens itself, so as not to affect the balance and center of gravity of the whole machine. 
Noise and vibration 
Choose low noise, low vibration motor to avoid affecting the image quality. Brushless DC motor or ultrasonic motor is available. 
Control interface 
The control interface of the motor needs good communication and synchronization with the main control system of the camera. Interfaces such as I2C, SPI, or PWM are commonly used.