I started this group to bring together all excellent solargraphy photos from around Flicker.
See Solargraphy in Fluidr:
Photo used in the icon of this group is captured by user djwaxtastic
Solargraphy is method to capture the paths of the sun with small aperture pinhole camera. The camera is placed on a static platform and secured with e.g gaffer tape.
Exposure times vary from days to months.
After taking the photo, photographic paper is scanned and inverted in Photoshop or other program.
***Exposure time at least one day, so no ordinary pin hole stuff
***Feel free to invite people who are interested in solargraphy
***Add also photos of your solargraphy "equipment" to pool
If you don't yet know what is solargraphy, find more information from www.solargraphy.com.
Site has also guide to make your own pin hole camera for taking long exposure photos.