"The photogram, image formation outside the camera is the real key to photography. It embodies the essence of the photographic process that allows us to capture light directly on the light-sensitive material without the use of any camera. It reveals a previously unknown, intrinsic optical imaging, and is the most potent weapon available to us in our quest for a new vision."
Laszlo Maholy-Nagy, 1924 - Click on the images for more detail