Cinerama continued through the rest of the 1960s as a brand name used initially with the Ultra Panavision 70 widescreen process (which yielded a similar 2.76 aspect ratio to the original Cinerama, although it did not simulate the 146 degree field of view.) Optically "rectified" prints and special lenses were used to project the 70 mm prints onto the curved screen. The films shot in Ultra Panavision for single lens Cinerama presentation were It's a Mad, Mad, Mad, Mad World (1963), Battle of the Bulge (1965), The Greatest Story Ever Told (1965), The Hallelujah Trail (1965) and Khartoum (1966).