CinemaScope was developed to use a separate film for sound (see Audio below), thus enabling the full silent 1.33:1 aperture to be available for the picture, with a 2:1 anamorphic squeeze applied that would allow an aspect ratio of 2.66:1. ... This was the CinemaScope, or CS, perforation, known colloquially as fox-holes.

What is the CinemaScope aspect ratio value?

CinemaScope ratio could display images as wide as 2.66:1, though it was reduced down to 2.55:1, and then later 2.35:1, to give space for the audio tracks to be placed on film strips. On a 35mm film strip, the 2.55/2.35 image would be squeezed to an aspect ratio of 2:1.

What is a CinemaScope screen?

CinemaScope, filmmaking process in which a motion picture is projected on a screen, with the width of the image two and a half times its height. ... Then, by the use of a special projection lens, the image is restored to clarity and expanded onto a wide screen without distorting the proportions.