How about a Digital Film Roll cartridge for a standard manual SLR Camera that can replace your conventional 35mm film roll... The digital cartridge could have parts which would fool the manual SLR to believe that the roll is real... i.e., wind the roll in place after every exposure, unwind etc. The cartridge would consist of a battery unit, storage space, exposure transfer screen/pad, roll advance sensor. The battery and storage is shaped like a standard film roll atttached to a screen,...