He has photographed the landscape of the South for almost 30 years. Through photography, Guion explores the spirit of place, or the quiet presence revealed in the changing moods of light on the land. This can be seen clearly in his series of images of Southern live oak trees and in his explorations with oaks of California. Guion’s black-and-white photographs are highly detailed and are in large formats. He captures various species of the Southern and Western oaks and sensitively captures the trees’ essence and character. The images reveal the majestic as well as the mystical qualities of these elder trees of the American landscape. They also portray the oak trees elegantly.