No title - The lens.

Probably filmed at Pathe studios, London.

Various shots of camera lenses through the ages including cameras shaped like a rifle and binoculars. M/S of two young women in their bathing suits, one is filming behind a movie camera whilst the other is shouting instructions through a megaphone. Various shots of lenses, telescope and lighthouse. C/U of a woman with spectacles on reading a book, she takes them off and looks at the camera to show the lens of the eye. M/S of a diagram of the eye. Various diagrams show how a lens bends light. Another diagram shows how light passes through a camera to project the image upside down.