The YN16mm F1.8S DA DSM Lens from Yongnuo is a compact 16mm focal length lens compatible with the Sony E mount. The lens allows you to assign custom functions to the control ring. You can assign aperture, shutter speed, and ISO sensitivity and rotate the ring to adjust one of these accordingly. The lens features an integrated digital stepping motor (DSM) with fast start/stop response, high focusing accuracy, and quiet focusing. A built-in USB-C port lets you directly update the firmware of the lens to best suit your shooting style.