By connecting the USB cable to a computer, SIGMA USB DOCK enables photographers to update the lens firmware and adjust parameters such as focus. It is designed for use with the New Contemporary, Art and Sports product lines.   The adjustment is processed with special software (SIGMA Optimization Pro). The AF speed, focus limiter and OS function are also customizable for Sports lenses. The latest YouTube Tutorials show you everything you need to know.
Chapter 1:  Installation of Software & Connection of the Lens
 

Chapter 2: Firmware Update

Chapter 3: Focus Adjustment

Chapter 4: Manual Focus Settings

 
Chapter 5:  Auto Focus Adjustment

Chapter 6: Focus Limit Adjustment

Chapter 7:  Optical Stabilizer (OS ) Adjustment