Multiple-exposure lever Multiple-exposure lets you overlay two, three, four, or even more images on a single film frame. The multiple-exposure lever of the Mamiya 7II makes this highly creative photographic technique simple and easy Hold down the lock button and set the multiple-exposure lever to the mark either before or after shooting an image. Now when you operate the film advance lever, the camera is prepared for another exposure without advancing the film. To cancel multiple-exposure, hold down the release button and return the multiple-exposure lever to its original position.