This is a photo of autumn aspens at the Oxbow and Grand teton National Park. The photo was taken with a Nikon D 7100, Nikkor Zoom lens (18-200 mm.), with a B&W Circular Polarizer. The ISO was 200, F/20, a 1/8th second exposure, and a Focal Length of 62 mm. I used a Gitzo Tripod and Arca-Swiss Head.