>>395074335mm film was originally made for motion pictures. The first 35mm cameras had to be loaded with bulk film in a darkroom. Leica introduced the refillable 35mm cassette, and the Kodak invented the disposable 35mm cartridge. The sprocket holes intended for motion picture cameras made film take-up and advance easier than with medium format.
70mm motion picture film has sprockets, but the format was never widely adopted for still cameras. The US space program used to use Hasselblads with 70mm film backs.
