The "70" in Ultra Panavision 70 mostly refers to the projection system. As projected in the the theater, it uses 70mm film. During the filming process a 65mm

The "70" in Ultra Panavision 70 mostly refers to the projection system. As projected in the the theater, it uses 70mm film. During the filming process a 65mm stock is used. The extra 5mm was for the optical soundtrack.