On this lens, the wheel controls the focus while focal length is adjusted by the lever. The Mamiya 6 of the late 1940s and early 1950s was a good quality 120 roll film camera from Japan. In order to load film, the film pressure plate must be removed, the film threaded through a frame and the pressure plate replaced. Focusing is accomplished via the serrated wheel on the back of the camera and is assisted by a coupled rangefinder. A red signal in the viewfinder warns if a double exposure is possible.
Flash synchronization is accomplished by a switch operated by the shutter cocking lever.
Film is moved from one cassette of the type shown to another. After the shutter is released the rod pops out from the left side of the camera, advancing the film by spring power. Pushing the rod back in cocks the shutter and tensions the film transport spring. The camera may be found in other colours also. Format is 18 by 24 mm.