Projectors share a common history with cameras in the camera obscura. The lens was designed to improve the image projected by the camera obscura. Her work has been featured in such publications as Film Comment and Camera Obscura. This effect is used in pinhole cameras and camera obscura. The use of a lens in a camera obscura has been dated back to 1550. His findings solidified the importance in the history of the camera obscura. The magic lantern can be seen as a further development of camera obscura. The modern photographic camera evolved from the camera obscura. This device was attached to a wall of the camera obscura (EF). Around 1600 the camera obscura was perfected. This phenomenon is known as camera obscura or pinhole image. Scheiner also made a portable camera obscura. This leaves the image reversed, but would become common practice in later camera obscura boxes. The popularity of Della Porta's books helped spread knowledge of the camera obscura. A 1,000-seater theatre, bar, camera obscura and office suite replaced this in 1899/1901.