main4

About Camera

Mozi correctly asserted that the camera obscura image is inverted because light travels in straight lines from its source.

Before the invention of photographic processes, there was no way to preserve the images produced by these cameras apart from manually tracing them. The earliest cameras were room-sized, with space for one or more people inside; these gradually evolved into more and more compact models. By Niépce's time, portable box camera obscurae suitable for photography were readily available.

Camera obscura

The forerunner to the photographic camera was the camera obscura. Camera obscura (Latin for "dark room") is the natural optical phenomenon that occurs when an image of a scene at the other side of a screen (or for instance a wall) is projected through a small hole in that screen and forms an inverted image (left to right and upside down) on a surface opposite to the opening