The regular Mamiya left hand grip with shutter release allows the use of a cable release. It also has a port for a special double ended release cable that connects to the lens shutter for mirror up shooting. A 1/4 tripod thread is on the bottom as well. There is no danger of it bending, twisting, or coming loose. And it is definately made by Mamiya, in big white letters. While fitting the 330 as well, it was designed primarily for the RB