Mo Ti was one of the first people to use a camera obscura. This was estimated to have been around the fifth century B.C.
The camera obscura worked by light entering through a small pinhole which hits the wall inside, forming a faint image which can be traced.
When the image is projected,, it appears upside down.
Arab Physicist, Alhazen discovered that the smaller the pin hole the sharper the image came into focus.
Daniello Barbaro discovered that replacing the pinhole with a glass lens gave the image a brighter and sharper focus.
In the 17th century scientists and artists developed portable camera obscuras. Early versions of which were simply light-proof tents with lenses sewn into the walls.
Later versions were long wooden boxes that projected an image onto a piece of frosted glass built into the lid.
Images tend to be circular and out of focus around the edges. The distortion was fixed with the development of the complex multilens system, in the 1700s.
All information was provided by Theresa Reed Pellissippi State COmmunity College