A series of ten zones (or tones) from 0 (black) to 9 (white) with 5 being middle gray and reflecting 18% of the light. Each zone reflects double or half of the light (1 Stop) of the adjacent one. Specific subject tones can be placed in predetermined zones that best suit a particular subject, contrast range, and stylistic intent. Developed by Ansel Adams, the system is widely taught and is detailed in books by Minor White and others.tiffaneduglossary
A way to focus that utilizes the depth of field scale rather than the actual distance from camera to subject. Zone focusing is most useful for candid, street photography.
A method introduced by photographer Ansel Adams for determining optimal exposure and appropriatedevelopment for an individual photograph.
An exposure calculating system based upon previsualizing the scene as a set of tonal variations, and exposing and developing to maximum that tonal set.
A system designed to bridge the gap between sensitometry and creative photography. It was developed byAnsel Adams and Fred Archer in 1939-40. It relied on empirical testing by the photographer of film and paper to provide information about the characteristics of the materials to support the photographer in definingthe relationship between the way a subject was visualized and the end result.
An exposure method developed by photographer Ansel Adams for determining optimal exposure and development for each negative.