>>2665542C mount lenses are really for 8 and 16mm film and some CCTV cameras, 16mm and super 16 film is smaller than m4:3, so you will lose the corners. a lot of people think they are the same size because of the BMPC because it uses a m4:3 mount and sensor. But the BMPC uses a small section of the sensor to give a Super 16 frame size