“For every shoot I’m really focused on what I need to do,” Sorensen says. “I’ve got the image inside my head, so I just need to capture it real time.” His process involves setting up a large backdrop along a pool’s wall and hanging powerful studio lights above the surface that flash whenever he takes a picture. His camera is encased in a waterproof shell. “Everything is more difficult underwater. The environment’s not so controllable, so you waste a lot of shots. But the reward is so much bigger, when everything clicks,” he says.