Camera Obscura is a box with a tiny hole on the one if its side. On daylight on the other side of the box inside there is an color projection of the subjects that the box points to. The image is up side down. This is explained with simple law of the physic world. The light reflected form the bright objects is moving straight in line and it pass through the tiny hole and project the image on the other side of the box as flipped image.

The earliest mention of camera obscura was by the Chinese philosopher Mo-Ti (5th century BC) when he saw the image projected on the wall in dark room trough the tiny hole.

Aristotle (384-322 BC) understood the optical principe of this device, when he viewed sun eclipse projected on the ground through the holes in sieve and gaps between the leaves of the tree.

The Islamic scientist Alhazen (Abu Ali al-Hasan Ibn al-Haitham) (965 - 1039) describes in details the principe of the device as he made a lots of tests with 5 spotlights.

In 1490 Leonardo Da Vinci wroe in his notebooks two full descriptions of the camera obscura.

The first variants of the camera obscura were dark rooms used for use of examine the astronomic objects (Illustrated by Dutch scientist Reinerus Gemma-Frisius in 1544).

In 16th century the quality of the image was improved when the lens were added to the camera obscura and a mirror to flip the projected image.

In 1558 Giovanni Battista Della Porta recommended the use of the camera obscura as a tool for easy painting for artists.

The first use of the term "Camera Obscura" were used by the Dutch astronomer Johannes Kepler at the beginning of the 17th sentury. He used a movable tent to make astronomical study.