ZoneSystem
Zone System is an exposure control system used in black and white photographic printing. It involves varying the contrast in an image by adjusting the range of tones across a print. This is typically achieved by dividing the print into three or four zones, each with a distinct tonal value.
The Zone System was developed by Ansel Adams in collaboration with Fred Archer in the 1930s. It
Each zone in the system has a specific light value, expressed in a system of steps, from
A photographer using the Zone System must control the contrast of the image during the negative stage,