Depending on the camera and the active focusing point, either the camera's AF-assist beam or he Speedlite's AF-assist beam is emitted. Speedlite 380EX's AF- assist beam is linkable only to the center focusing point. If the camera has only one focusing point (AF frame) the Speedlite's AF-assist bean is emitted.
Speedlite 380EX's flash head zooms automatically to provide adequate flash coverage for the lens focal length in use. Flash coverage is provided for 24mm to 105mm focal lengths. The corresponding flash coverage indicator on the Speedlite lights When a zoom lens is used, the Speedlite adjusts the flash coverage automatically whenever the lens is zoomed.
When Speedlite 380EX is used with a Type-A camera and the switch is set for high-speed sync, using a shutter speed faster than the camera's maximum sync speed sets the normal sync mode. When a Type-B camera is used, normal sync mode is set regardless of this switch's setting
