Caitlin under glass during the 2013 Scott Kelby Worldwide Photowalk. Canon EOS 550D (T2i) · Sigma 10-20mm F3.5 EX DC HSM 15 mm · 1/500 s · f/3.5 · ISO 200 I’ve never gone on a real photowalk before, especially one so official. Our little group was among some 30,000 people around the world who grabbed their cameras and, well, …