John Sexton photographs Ansel Adams group leader Deborah Hall while demonstrating how he uses his large format camera during the Ansel Adams Workshop at Yosemite National Park in June 1981. (© Cindi Christie/Cyanpixel)
John Sexton photographs Ansel Adams group leader Deborah Hall while demonstrating how he uses his large format camera during the Ansel Adams Workshop at Yosemite National Park in June 1981. (© Cindi Christie/Cyanpixel)