Six Month exposure

[Ross Chambers]

http://apod.gsfc.nasa.gov/apod/ap090626.html

[crispinuk]

I had a go, 21st Dec 2008 to 21st June 2009, Portsmouth U.K.:
http://homepage.ntlworld.com/crispin.summers/scratch/2009-c1-web.jpg

[Marco B]

Lets not forget the famous ultralong exposure rebuilding shots of the Berliner Potsdamer Platz Michael Wesely made with exposures up to 2 years(!):

http://www.wesely.org/wesely/gruppe.php?var=potsdamerplatz

Marco

[BetterSense]

That Potsdamer site does not explain how the exposures were made. Any ideas?

[Marco B]

That Potsdamer site does not explain how the exposures were made. Any ideas?

If my memory does not fail on me, they were made using almost room size large pinhole type cameras with photopaper in them....

[fiducio]

Solargraphy! Pinhole onto B&W paper. It's all discussed here :

http://www.apug.org/forums/forum42/63477-solargraphy.html