I know they used VistaVision cameras for the special effects which this shot clearly is. VistaVision shoots 35mm film 8 sprockets vertically instead of the 4 sprocket horizontal feed of a normal cinema 35mm camera.
In DSLR sensor size, VV is comparable to FullFrame and Super35 (the full 4 sprocket 35mm cinema frame) is comparable to APS-C.
That camera is NOT a three strip camera. Look at the magazine. There is an obvious single strip feed and a single strip takeup section.