pinspeck camera
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A pinspeck camera is the optical reverse of a
pinhole camera A pinhole camera is a simple camera without a lens but with a tiny aperture (the so-called '' pinhole'')—effectively a light-proof box with a small hole in one side. Light from a scene passes through the aperture and projects an inverted image ...
: a small (point-like) obstruction (the speck) is placed in front of the film where the (pin) hole would be in a pinhole camera. (The dark screen is “replaced” by the transparent nothing around the speck.) Whereas in a pinhole camera the hole allows rays of light from different parts of the scene to reach different parts of the film, the obstruction in the pinspeck camera causes the ''shadow'' of different points in the scene to fall on different points on the film. The result is a negative image.


External links


Jearl Walker ''The Pleasure of the Pin Hole Camera and Its Relative the Pinspeck Camera''
* Adam Lloyd Cohen ''Anti-pinhole imaging'' Optica Acta: International Journal of Optics Volume 29, Issue 1, 1982 Cameras by type {{photo-stub