The first step in the process of correctly exposing any photograph is previsualization. In terms of deciding how to expose a given subject, the important question in most cases will be, what part of this picture do I want to print as Zone III? Zone III is important because it is the darkest zone that shows full texture and detail. Remember that the rule is: Expose for the Shadows. Take a careful look at Figure 29A. Imagining that this is an actual scene, which areas would you judge to be Zone III? The obvious answers are the model's hair and the darker parts of the door on the right. For brown hair to print realistically it has to be detailed enough to show individual strands. This automatically indicates Zone III. Blond hair is closer to Zone VII.
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