Adams, Ansel (Feb. 20 1902 — Apr. 22, 1984), photographer and environmentalist, was born in San Francisco, California. 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 a system of image-making called the Zone System, a method of achieving a desired final print through a technical understanding of how the tonal range of an image is the result of choices made in exposure, negative development, and printing. For his work and his persistent advocacy, which helped expand the National Park system, he was awarded the Presidential Medal of Freedom in 1980. Today, the artist’s works are held in the collections of The Museum of Modern Art in New York, the National Gallery of Art in Washington, D.C., the Los Angeles County Museum of Art, and the Victoria and Albert Museum in London, among others.