Answer:
Camera Obscura "dark room" - a dark chamber wherein there is some hole in the wall, which the light appears on the opposite wall, the image appears upside down and reversed.
It was used as an aid for artists for more accuracy in their imagery, such as painters and those that drew.
It was the forerunner to the photographic camera.
William Henry Fox Talbot, Latticed Window taken through the camera obscura, August 1835
Explanation:
