Can be used with any 4x 5 view or field camera with spring-loaded or Graflok back Slides easily into camera back like a sheet film holder without having to remove ground glass frame Offers an economical alternative to sheet film, especially when heavy bracketing is required Features perspective controls in medium format with any focal length lens Constructed of rugged plastic housing & precision film advance/counter assembly Offers exceptional film flatness Accepts both 120 (10 exposures ) & 220 (20 exposures ) film rolls