Ansel Adams (1902-1984) was one of the most iconic American photographers of the 20th century. He is best known for his stunning black-and-white pictures of the American wilderness, particularly the national parks. In addition to being a skilled photographer, he was also an avid environmentalist who used his work to help promote the preservation of natural landscapes. His best-known works capture the beauty and majesty of places like Yosemite National Park, where he spent most of his time.

Adams had a significant role in raising photography to the status of fine art. He was able to create amazing clarity and tonal range in his photography by using techniques like the Zone System, which he developed with Fred Archer, and strong contrasts. His images stood out due to his technical proficiency and ability to evoke emotion through the breathtaking landscapes, showing nature in ways that inspired people to appreciate and protect the environment.

Beyond his career as a photographer, Adams was a dedicated conservationist, who frequently worked with groups like Sierra Club to support the preservation of wilderness areas. His photos, especially those of untouched wildlands, not only captured the awe of natural beauty but also served as a powerful tool for environmental campaigning, influencing public opinion and legislation related to land conservation.