I recently completed designing and building a 8×10 large format digital video camera, the first of it's type in the world. LargeSense has some interesting tests with x-ray sensors (I think?) but this camera can be made for orders of magnitude less cost, and I don’t think they have yet made a fully working camera. I get into how it works in the video below, but essentially it's off-axis reimaging of a projected image, and this folded optical path cuts the size of the rig in half compared to other digital large format attempts! as with any re imaging camera, you lose some light, but with advances in large aperture wide angle lenses (I am using an Irix 15mm f2.4 Firefly) and sensitive cameras (a Sony a7s in my case) this sort of camera is now a practical possibility.
here are some images of the rig itself (the camera is dismounted in some of the shots, to be able to take images of the camera):
and here are some still images taken with the camera:
