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Video aspect ratios, screen masking and anamorphic lens systems
by Nyal MellorMarch 25, 2013
This article reviews HTDV and film content aspect ratios and looks at ways to match content to display. These include manual and automated screen masking systems as well as anamorphic lenses and the 'zoom' method.
Aspect ratio describes the relationship between the width and the height of an image. 70-80% of modern movies are filmed in an aspect ratio of 2.35:1 or 2.4:1, meaning the image is over 2x wider than it is high. HDTV, however, uses a 1.78:1 aspect ratio. There are further variations on aspect ratio including the 1.88:1 used in US movies and the 1.66:1 European standard. The
classic movies of the pre-1950s era were often filmed in 1.33:1.
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Nyal Mellor
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