The German photography artist Michael Wesely used large format cameras (4x5 inches) to capture the light of his objects for up to 3 years in monochrome or colour.
In 2001 he was invited by the Museum of Modern Art in New York to use his unique technique to record the re-development of their building. He set up eight cameras in four different corners and photographed the destruction and re-building of the MoMa until 2004 - leaving the shutter open for up to 34 months! Wesely claims that he could do exposures almost indefinitely - up to 40 years.
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