I am curious. I wonder if someday there will be a back , the size of a 4X5 film holder, that can be used in a 4x5 camera for digital capture. I remember a few years ago there was a company that came out with a device that fit into a 35mm camera that captured digital images. That idea was wiped off the map. I love film, but I would like the flexibility to use both types of capture in the same camera.