An ebook Guide to Free Camera Manuals

ABELSON CAMERA REPAIR AND OWNER MANUALS
It was originally a closed room whose only light source was a small hole in one wall, through which came the light rays reflecting objects outside one of its walls. The hole acts as a converging lens and projected on the wall opposite the outside inverted image both vertically and horizontally.
Content
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* 1 Etymology
* 2 Origins
* 3 Use
* 4 See also
* 5 External links