Mamiya's exclusive revolving back system allows you great freedom in camera positioning and an extensive choice of films and formats. Interchangeable magazines permit a wide variety of films to be used by simply changing magazines or film holders at any time during a shooting session: 120, 220, Polaroid Pack Film, or Kodak and Polaroid Sheet Films. A choice of 4 format sizes allows you to pick the perfect format for each job. Additionally, there are 2 formats for instant proofing. Roll film is advanced with a single 114? stroke of the Cocking Lever, and can also be advanced with the Film Advance knob of the Film Holder. Extra Magazines allow mid-roll change to other films. ADDITIONAL FEATURES: Built-in double exposure prevention, multiple exposure provision, automatic film wind-stop release. Fully meter coupled with built-in Film Speed Dial. Exposure Counter with automatic return. Film-unadvanced indicator, automatic Dark Slide lock and release Memo Clip, built-in Dark Slide slot.