[Frameworks] Extremely Long Exposures - for Months and Years

From: Aditya Mandayam (email suppressed)
Date: Tue Nov 02 2010 - 04:40:11 PDT

Hello, I am interested in making extremely long exposures: of the
order of many months, perhaps a few years.

E.g: http://photoslaves.com/open-shutter-by-michael-wesely/

I asked this question on photo.net as well:

I would like to know how to meter for such long exposures. What amount
of light does one assume? Average brightness of a day over a year?

Thank you.
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