Beyond the Zone System, Paperback by Davis, Phil, ISBN 0240803434, ISBN-13 9780240803432, Brand New, Free shipping in the US New edition of a text that explains the why and how of the photographic process. Davis (emeritus, art, U. of Michigan) explores reading and interpreting film and paper curves, how a computer program simplifies exposure and development control, light metering, and densitometers. He includes plans for adapting a light meter to serve as a densitometer and instructions for constructing specialized developing tubes and an exposure calculator. This edition features a new chapter on control of image gradation. Annotation c. by Book News, Inc., Portland, Or.