The origin of it all. Pinhole cameras are the most simple cameras you can find. Or make. Just a tiny hole and a dark box with a film inside. Or like the old painters did, just trace the image that appears with paint and whalla you have a realistic image of reality.
Depending on the process used the exposure time can differ from just a couple of seconds up to months. Yes, months. Matthew Allred is a photographer who uses a pinhole to capture amazing landscapes. By using the process called Heliography he sets out to create wonderful photographs. The exposures he uses are long. Long enough to track the path of the sun. In one photograph he tracks time like no modern camera can.
Matthew Allred’s website: www.matthewallred.com