Samyang has launched a USB dock for its Canon EF bayonet lenses, which can be used to fine-tune some of the lens's properties, so that the focus can be made more accurate, the initial size of the aperture can be set, the sensitivity of manual focus can be changed, and of course the lens's firmware can be updated as well . To do this, we need to screw the lens into the dock, or connect the dock with a USB cable to a Windows or Macintosh operating system computer.