The 1996 digital S1 from Leica. It was a digital scanning back that could work with various lenses. Each exposure took 185 seconds to complete so had to be shot using continuous light. You might think that such an old digicam would produce inferior results, but apparently it was quite the opposite, creating 76Mb @ 24-bit (151Mb @ 48-bit), 5140 x 5140, 12-bit RGB image files that contained little if any of the artifacting, blooming, and fringing. A snip at $21,500 back then!