What is the Ansel Adams Zone System?

The Zone System is a photographic technique created by Ansel Adams and Fred Archer around 1939 to 1940 to help photographers determine optimal film exposure and development. It provides a systematic method for linking a photographer's original visualization of a subject to the final print using principles of sensitometry. Although originally developed for black-and-white sheet film, the system has since been applied to various film formats and digital photography.

What we know

• The Zone System was formulated by Ansel Adams and Fred Archer around 1939–40 at the Art Center School in Los Angeles. [2]
• The technique is based on late 19th-century sensitometry studies conducted by Hurter and Driffield. [2]
• The system gives photographers a systematic way to precisely connect their initial visualization of a subject with the final photographic result through exposure, development, and printing choices. [2, 3]
• Although originally created for black-and-white sheet film, the Zone System is also applicable to roll film, color, reversal, and digital photography. [2]

Where to go next

• whoWho was Fred Archer?
• the bigger pictureHow did Ansel Adams shape American environmentalism?
• a case in pointWhat role did Monolith, the Face of Half Dome play in photography?
• how it workedWhat are the foundational principles of sensitometry?
• what followedHow does digital photography use the principles of the Zone System?
• an unexpected connectionHow did a Hollywood portraitist help create landscape photography's most famous technical system?Fred Archer, who co-developed the landscape-oriented Zone System with Ansel Adams, spent the early part of his career specializing in portraits of Hollywood movie stars.

Sources

• [1]Zone System (Wikidata Q219915) · CC0 1.0
• [2]Zone System · CC BY-SA 4.0
• [3]Ansel Adams · CC BY-SA 4.0
• [4]Fred R. Archer · CC BY-SA 4.0
• [5]Monolith, the Face of Half Dome · CC BY-SA 4.0