CD1 Track 06
The pinhole camera is a very simple device. It consists of a cylinder with a radius of approximately 4 cm and a height of 12 cm. There is a small hole 1 mm in diameter positioned halfway up the wall of the cylinder. A sheet of photographic paper 18 cm in width curves round the inside of the cylinder leaving a gap of about 1 cm just behind the pinhole. The camera is very simple to use, but it takes a long time to produce a picture. If you fix the camera outside and expose it to the light, after a few minutes, you will find that an image has appeared on the photographic paper.