EF Mount (LBUS)
EF lens mount with LBUS connector and a new, wider light baffle that illuminates Super 35 and large format sensor areas. The internal motors of Canon EF lenses can be controlled with the WCU-4, SXU-1, OCU-1 or Master Grips. Lens metadata (focal length & iris, no focus) are passed through to the camera. Fits ALEXA Mini LF, ALEXA Mini and AMIRA, but only ALEXA Mini LF and ALEXA Mini support the LBUS connector.