Solargraphy is a form of long-exposure photography to capture the paths of the sun across the sky. Photographic paper is used instead of film because it's a lot less light sensitive.
Two months ago I decided to give this technique a try, so I made two pinhole cameras and loaded them with old agfa photographic paper. I installed one on the roof of the building I live in and one the balcony. This is the image I found in the one on the balcony (the one on the roof seemed to have disappeared somewhere at the end of march). This image has been exposed from 01/03/10 until 03/05/10.
It turned out better than I expected, there's a good amount of traces of the sun visible and the surroundings are clear enough too. It seems the camera moved a bit somewhere halfway trough though.
