Optical Anamorphic Conversion Original Original 2.35:1 aspect ratio that was displayed on the motion picture screen. What the cinematographer intended.
Optical Anamorphic Conversion Letterbox The 2.35:1 picture superimposed on a 16:9 aspect ratio display. Projector is not using all of its resolution or brightness because all pixels are not used.
Optical Anamorphic Conversion Squeezed A digital scalar is used to vertically stretch the letterboxed picture until all pixels are utilized.
Optical Anamorphic Conversion Final Image A 1.33x anamorphic lens performs the horizontal stretch to achieve what the cinematographer intended.
Video Source 2.35:1 Program 16:9 Projector Displaying 2.35:1 Program Letterbox HDMI No Scaling 16:9 image Projector Anamorphic lens out of light path
Video Source 2.35:1 Program 2.35:1 image Anamorphic System With Projector 2.35:1 Program HDMI Vertical Stretch Projector Anamorphic lens in light path