In one embodiment, the invention is a magnetic shift register memory device. In a single photography mode, upon a half press of the shutter release button, imaging units carry out preliminary photography at magnifications different from each other. Next, a reproducible gray level is generated based on the gray level of an input pixel. The plurality of channels cooperate to produce substantially real-time timing measurement data in parallel. A plurality of intended die areas are defined on the first main surface of the device layer.