 Alongside the lens mount Sony has replaced the traditional autofocus mode selection dial with a "Silent Multi-Controller" which is a customizable dial with silent detents and a central button used for confirmation.The dial's function can be brought up with a press of the central button and then changed using the dial silently during movie or still recording.The dial's functions can also be changed on the fly by long-pressing the button and then selecting whichever function is desired.