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Zone System

In photography, the Zone System is a technique invented by Ansel Adams to simplify and standardise the production of black-and-white photography. The Zone System allows a photographer to translate their idea into a print.

The Zone System separates the pictures tones into eleven zones, numbered using Roman numerals.

0: Pure black
I: Near black
II: Dark gray / black
III: Very dark gray
IV: Medium dark gray
V: Medium gray (equal to Kodak's 18% Grey cards)
VI: Mid-tone gray
VII: Light gray
VIII: Gray / white
IX: Near white
X: Paper base (Pure white)

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