About 15 years ago, Colby Caldwell saw the future of photography in a flatbed scanner. “In actuality, it is a camera, just in reverse,” Caldwell says. “Typical cameras receive light, but scanners emit light as well.” For years, Caldwell used a scanner in his studio to make highly detailed images of dead birds, spent shotgun shells, and other subjects. Then, in January, Caldwell decided to take the scanner directly to the forest floor, lugging it and a power source in his backpack.