13 Picture control
In this chapter we shall be looking at various ways in which the tonal quality of the picture can be adjusted and the contribution picture control can make to the visual impact of the final picture.
Tonal limits
Tonal response
As we saw earlier, all photographic and television systems can only handle a limited brightness range. Within that range, reproduced tones are generally proportional to those in the scene. When film receives insufficient light it registers nothing but an even ‘fog’ density which we accept as ‘black’. In a photographic system, as highlights in the scene approach the upper limits they will be reproduced as increasingly smaller tonal changes, until the lightest tones crush to an even ‘white’. This ...
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