What is Pinhole photography
Theory
A pinhole camera is a camera without a conventional glass lens. An extremely small hole in a very thin material is used to focus light rays from an object onto the film.
The shutter of a pinhole camera usually consists of a hand operated flap that covers the pinhole.
Characteristics
Pinhole images are softer – less sharp – than pictures made with a lens. The images have nearly infinite depth of field.
Exposures are long, ranging from half a second to several hours. Images are exposed on film or paper.
History
The basic optical principles of the pinhole are commented on in Chinese texts from the fifth century BC. Chinese writers had discovered by experiments that light travels in straight lines. The philosopher Mo Ti (later Mo Tsu) was the first to record the formation of an inverted image with a pinhole or screen.
Sir David Brewster, a Scottish scientist, was one of the first to make pinhole photographs, in the 1850s. Which he used in his book The Stereoscope, published in 1856.
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