Mamiya's HM401 film magazine, which is the standard film back for the 645AF camera, incorporates a microprocessor that communicates with the camera body and magazine LCD.
Note! This film back will ONLY fit the 645AF camera and WILL NOT fit the older Mamiya 645 cameras. In addition, the insert included with this back ONLY fits the AF film backs. It will NOT fit the older manual Mamiya 645 cameras.
