R&D Report 1969-47 : Viewing conditions for film review theatres
T.W.J. Crompton

This report describes viewing conditions for film review theatres used to appraise film for television purposes or for accurate colour grading. The advantages of conventional projection (e.g. simplicity, high resolution and shadow details) are preserved. The addition of a large illuminated surround of suitable brightness and colour temperature to the projection screen goes a long way towards subjectively removing the effects fo the very different viewing conditions of the cinema and television in the home. Moreover, the presence of the large illuminated surround produces a pleasant working environment. A picture highlight luminance of 17 ft-Lamberts (182 asb) combined with a surround illuminated to 5 1/2 ft-Lamberts (60 asb) is recommended.

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