| Specifications at a glance - Todd-AO ® |
| Process Developer: American Optical Company & Magna Theatre Corp. Year of Introduction: 1955 NEGATIVE SPECS: Film Gauge: 65mm Direction of travel: Vertical - five perforations - 24 fps / 30fps for first 2 features Camera Optics: Spherical Aperture Dimensions: 2.072" x .906" Max Aspect Ratio: 2.21:1 PRINT SPECS: 70mm Roadshow Print Film Gauge: 70mm Direction of travel: Vertical - five perforations - 24 fps / 30 fps for first two features Projector Optics: Spherical Aperture Dimensions: 1.912" x .870" nominal Max Aspect Ratio: 2.21:1 Sound Format: Magnetic Six Track Stereo - L, LC, C, RC, R stage channels and mono surround channel - (Perspecta directional tones used in surround channel in one feature.) Screen Design: 120 degree seamless curved screen. This feature was virtually abandoned by 1958 in favor of flat screens that were compatible with showings of other film formats. These print specifications are considered standard for the majority of 70mm prints, regardless of the image source.PRINT SPECS: 35mm Anamorphic Reduction Print Film Gauge: 35mm Direction of travel: Vertical - four perforations - 24 fps Projector Optics: 2x Anamorphic squeeze Aperture Dimensions: .839" x .700" nominal Max Aspect Ratio: 2.35:1 (with squeeze) Sound Format: "Magoptical" Four Track Stereo as per CinemaScope, plus half width mono optical - CS perforations Alt Sound Format: Optical monophonic - Standard perforations 35mm reduction prints are taken from the center of the negative using an area of 1.912" x .816".    |