At the edges, anyone who knows cameras can see through what is hidden behind the large black disc: ten aperture blades pushed to the side or the metal frame in which they are anchored identify the disc as an enlarged image of a camera lens. When the aperture is open, the moment at which the light enters the apparatus is represented, and on the rear wall of that camera obscura a laterally-reversed, inverted, negative image is projected there and recorded on film or stored by a sensor. The lens glass and lens have been removed to achieve an unbroken black that does not reveal whether we as viewers are in front of or behind the lens when we are reflected in it.