Inside the dimly lit Jesuit church in Quito, Ecuador, one can see two spiral staircases, one on each side of the main entrance. One of the staircases is real. The other is a “fool the eye” painting. This is a photo of one of them. The photo was taken with a Nikon D300 and a Nikkor 16-85mm VR lens at 45 mm. The exposure was f/6.3 and 1/13 sec (ISO 3200). Image by Irwin H. Segel.