When I turned forty, I created an album of twenty-four nude photos of myself. I took these in secret at home on 35mm film using an SLR with a telephoto lens. I didn't have a tripod, so I balanced the camera on a chair or a stack of books for low-angle shots. I would decide on a pose, then set up the shot, trying to focus on something near where I would be, and taking my best guess at framing the shot. Then I would activat...