Interchangeable Film Back Magazine: You need not carry two cameras when you want to use black-and-white and color films at the same time. The interchangeable film back magazine of the S2 is removable from the camera body. After taking each picture, you can exchange one film back magazine for another preloaded magazine. Various types of film can be simultaneously used on one Bronica S2 camera. Due to the perfect automatic operation of the film back magazine with the camera body, the inadvertent double exposure is prevented and the film will be advanced only after exposure.