I was positioned at Hopi Point on the South Rim of the Grand Canyon to get some sunset shots. When I took this one the sky was dramatic and the chiaroscuro effect of light and shadsows in the buttes was maximum. I used a Nikon D 7100 and Nikkor Zoom Lens (18-200 mm.) with a .9 soft Lee Graduated Neutral Density Filter. I used a Gotzo Tripod and Arca-Swiss Head. The ISO was 250, F/16, 1/80th second exposure, with a focal length of 65 mm.