"Pure photography is defined as possessing no qualities of technique, composition or idea, derivative of any other art form." —Group f/64 Manifesto, August 1932
Formed in 1932, Group f/64 was a San Francisco Bay Area-based informal association of 11 American photographers, including Ansel Adams, Imogen Cunningham, and Edward Weston. Like many postwar documentary photographers, this group of so-called 'straight' photographers focused on the clarity and sharp definition of the un-manipulated photographic image. Committed to a practice of "pure photography", Group f/64 encouraged the use of a large-format view camera in order to produce grain-free, sharply-detailed, high value contrast photographs. The name of the group is taken from the smallest camera lens aperture possible—which yields the sharpest depth of field.