Pan and scan
Pan and scan is a method of adjusting widescreen film images so that they can be shown in fullscreen proportions of a standard definition 4:3 aspect ratio television screen, often cropping off the sides of the original widescreen image to focus on the composition's most important aspects.
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Some film directors and enthusiasts disapprove of pan and scan cropping, because it can remove up to 43% of the original image on 2.35:1 films or up to 48% on earlier 2.55:1 presentations, changing the director or cinematographer's original vision and intentions. The most extreme examples remove up to 52% of the original picture on 2.76:1 presentations.