Arri bayonet is a lens mount developed by Arri for use with both 16 mm and 35 mm movie camera lenses. Lenses of this type are distinguished by "outer wings" which both control aperture and bayonet alignment, and are placed in the mount while two pressure tabs are simultaneously depressed at the side of the lens mount on the camera. These tabs provide a relatively strong locking mechanism which allows for higher quality lens seating than offered by the Arri standard mount. Debuting in 1965 with the 16BL, the Arri bayonet mount superseded the Arri standard mount, but cameras with the bayonet mount were also able to accommodate Arri standard lenses due to both mounts having the same flange focal distance and diameter. However, cameras with Arri standard mounts were unable to fit lenses with A