Ansel Adams was a renowned American photographer and photomuralist who is best known for his black-and-white landscape photographs of the American West. He was also an environmentalist and an advocate for conservation of wilderness areas. Adams was a master of the Zone System, a technique for controlling the exposure and contrast of his photographs. He was also a founding member of the photography group f/64, which advocated for sharp-focused images with a large depth of field. Adams' work has been widely exhibited and published, and he is considered one of the most influential photographers of the 20th century.