Got one more intersting Aspect about cameras in 13th Century

The forerunner to the camera was the Camera Obscura The camera obscura is an instrument consisting of a darkened chamber or box, into which light is admitted through a convex lens, forming an image of external objects on a surface of paper or glass, etc., placed at the focus of the lens. The camera obscura was first invented by the Iraqi scientist Ibn -al-Haytham (Alhazen) as described in his Book of Optics (1015-1021) ie in 11th Century
Source:
1)http://en.wikipedia.org/wiki/Camera
2)http://www.camera-obscura.co.uk/camera_obscura/camera_history.asp
Thanks to saagars