This last week I climbed up on the roof, the satellite dish post and the front porch to remove seven pinhole cameras. As I took them down, I took a picture of where each was aimed. These images give Tarja a reference as to what the image should look like while she does her imaging magic.
The cameras referred to above are simply 35mm canisters with a hole drilled in the side, a pinhole lens taped over the hole and a piece of B&W photographic paper inside the canister. You place the camera facing the Sun’s path and put it securely in place.
These were in place from the Vernal Equinox to the Summer Solstice. With luck, they will show the varying path the Sun takes through the sky as the seasons change. The magic is – when you remove the paper from the camera there is a pseudo color image already on the paper without any development.
Since the image will very quickly disappear in normal light, I don’t play with them myself, I send them to Tarja who has more experience with Solargraphy than anyone else I know about.
She sends you back the images and you pick one from the batch to be posted on her website. She will send the cameras to you free of charge. You put it up, take it down and mail it back. It cost about $5.00USD this last time for the postage. All in all, a very cheap investment in both a scientific endeavor and photographic experiment.
http://www.solargraphy.com/
