History of Scope Aspect Ratios


Film Camera
Film Projector
Aperture Sizes 2x Aspect Ratio Aperture Size 2x Aspect Ratio Standards
0.980"x0.735" 2.6666…:1 0.906"x0.6795" 2.6666…:1 no standard (demo in 1953 based on silent film)
0.937"x0.735" 2.5496…:1 0.912"x0.715" 2.5510…:1 PH22.104-1957 (withdrawn in 1964)
0.866"x0.732"
0.864"x0.732"
0.868"x0.735"		 2.3661…:1
2.3606…:1
2.3619…:1		 0.839"x0.715" 2.3468…:1 PH22.106-1957, PH22.106-1965
0.866"x0.732"
0.864"x0.732"		 2.3661…:1
2.3606…:1		 0.838"x0.700" 2.3942…:1 PH22.106-1971, PH22.195-1976, PH22.195-1984
0.866"x0.732"
0.864"x0.732"		 2.3661…:1
2.3606…:1		 0.825"x0.690" 2.3913…:1 SMPTE 195-1993, SMPTE 195-2000

Note: Digital Cinema Initiatives (DCI) specifies 2048x858 pixels (2.3869…:1) evenly centered within 2048x1080, or 4096x1716 within 4096x2160.
The HD variant is 1920x804 pixels (2.3880…:1) evenly centered within 1920x1080.

This web page was created by Erik Garci.