Factors Affecting Determination of Monochrome Television Film Exposure and Speed Indexing
Harold Wright · Journal of the SMPTE · 1964
Significant monochrome telefilm exposure-determining factors are examined relative to exposure research literature, the basis for American and German still photography film speed standards, and typical multiplexed telecine systems. Theoretical, graphical and pictorial evidence is offered to indicate that neither the “fractional gradient criterion” nor the “fixed density above fog” concept fits the telefilm situation, due to the interjection of the telecine transfer characteristic into the chain of processes between the scene and its TV reproduction. A systems analysis method for determining telefilm exposure requirements is described, the effects of flare light are considered, and a television approach to film speed indexing is described.