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Extraordinary advances in optical designs have taken place over the past twenty five years. There have been the steady advances in Super 35mm lenses (and larger formats) used in motion picture film production over many decades. The 1990 s saw the arrival of production HDTV systems based largely upon the small 2 /3-inch image format which was to spur highly competitive worldwide developments in HD studio, field, EFP, and ENG lenses.
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