captainsolo said:
And on Ben-Hur they added an anamorphic lens to the 70mm camera which then squeezed the ratio to an awesomely wide 2.76:1.
Just to clarify, 70mm films are shot in a 65mm format but the extra 5 millimeters are for the magnetic soundtrack.
Just to note, Ben Hur was shot in the 2.76:1 ultra panavision format, but was shown in theatres in 2.5:1 (this also hid soft imperfections on the edges of anamorphic processes. )