Pinhole Photography
Pinhole photography [pɪnhəʊl fəˈtɒgrəfi] is the simplest form of photography. The camera is simply made from a lightproof box with a tiny aperture, some sort of film and a small pinhole, as the name would suggest. The image comes out upside down because the light travels in a straight line through the pinhole and to the bottom of the image therefore creating the image to be upside down.