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Pinhole camera
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==Usage== [[File:Pinhole hydrant neg pos.jpg|thumb|right|upright=1.3|A [[fire hydrant]] photographed by a pinhole camera made from a shoe box, exposed on photographic paper to create the negative image (top). The positive image (bottom) was created digitally from the negative image. The length of the exposure was 40 seconds. There is noticeable flaring in the bottom-right corner of the image, likely due to extraneous light entering the camera box.]] 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) or to trace the image on paper. 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. A common use of pinhole photography is to capture the movement of the sun over a long period of time. This type of photography is called [[solarigraphy]]. Pinhole photography is used for artistic reasons, but also for educational purposes to let pupils learn about, and experiment with, the basics of photography. Pinhole cameras with CCDs ([[charge-coupled device]]s) are sometimes used for [[surveillance]] because they are difficult to detect. Related cameras, image forming devices, or developments from it include Franke's widefield pinhole camera, the [[pinspeck camera]], and the [[pinhead mirror]]. Modern manufacturing has enabled the production of high quality pinhole lenses<ref name=":0">{{Cite web|url=https://thingyfy.com/story-lens/|title=Pinhole Pro Lens by Thingyfy|date=2018}}</ref> which may be used with digital cameras.
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