It has the same sized sensor as a 35mm film camera... Small point of clarification: 35mm still photography cameras have the long side of the image aligned with

It has the same sized sensor as a 35mm film camera... Small point of clarification: 35mm still photography cameras have the long side of the image aligned with the sprockets, (864mm² total usable area) while 35 motion photography has the short side aligned with the sprockets. (334mm²) The RED ONE had a 35mm motion photography-sized sensor, (Super 35) the 5Dii had a 35mm still sensor, of course, being principally a still camera.