base, double perforated film, pre-loaded into felt-lipped, daylight-loading cartridges ready-to-use for still cameras. Originally intended for  Kodak Retina , Zeiss Ikon  Contax  and E. Leitz  Leica  35 mm  rangefinder cameras . Previously, bulk rolls of 35 mm motion picture film would need to be user cut and loaded, in complete darkness, into camera