What is a pinhole camera?A pinhole camera is a camera without a lens but rather a tiny a pinhole (a light-proof box with a small hole in one side). Light from a scene passes through the aperture and projects an inverted image on the opposite side of the box, which is known as the camera obscura effect.
Early pinhole photography:
The first known descriptions of a pinhole camera are found in the 1856 book The Stereoscope by Scottish inventor David Brewster. One older use of the term "pin-hole" in the context of optics was found in James Ferguson's 1764 book Lectures on select subjects in mechanics, hydrostatics, pneumatics, and optics.
How a pin hole camera works:
A pin hole camera works similarly to a human eye. The small hole in the light proof box, similar to a pupil, lets a small amount of light in. The small amount of light get reflected onto film and the photo is complete.
Uses for pinhole cameras:
The image of a pinhole camera may be projected onto a translucent screen for a real-time viewing (used for safe observation of solar eclipses). But it is more often used without a translucent screen for pinhole photography with photographic film or photographic paper placed on the surface opposite to the pinhole aperture.
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