Camera obscura

Camera obscura is term for first "camera" invented by Araps in 11. century. Actually it is about closed box that has one small hole on one side. And you wonder what now??? The catch is, that on the opposite inner side, inverse display of outer world reality is projected. At the end od 16. century italian artists had an idea to mount optical element on that hole, which enabled display of much sharper and brighter image.

Camera Obscura system