Ansel Adams

(1902 - 1984)
 

Ansel Easton Adams was an American landscape photographer and environmentalist known for his black-and-white images of the American West. He helped found Group f/64, an association of photographers advocating "pure" photography which favored sharp focus and the use of the full tonal range of a photograph. He and Fred Archer developed an exacting system of image-making called the Zone System, a method of achieving a desired final print through a deeply technical understanding of how tonal range is recorded and developed during exposure, negative development, and printing. The resulting clarity and depth of such images characterized his photography. 

https://en.wikipedia.org/wiki/Ansel_Adams
https://www.anseladams.com/

Mount williamson sierra nevada from manzanar
ca-1944