Response to Metering for zone system

Phil Davis' book, Beyond the Zone System, is really an alternative method of lighting based on ZS theory to produce negatives with full tonal range. Pages 62 ff. discuss incidence meter readings (which he prefers). True Zone System metering visualizes a particular shade/zone of grey for and object or part of the photograph. Typically, you "place" a shadow area on Zone III. Then the other areas of scene "fall" into other zones, and development is determined by the readings taken on them. This system requires a reflected spot meter of 1 degree. You really cannot do true ZS readings with an incidence meter. In a way, both systems get you to the same place, sort of.

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