[Frameworks] Extremely Long Exposures - for Months and Years

[Bernd Luetzeler]

I have done a film with 2 minute exposures and I had to dim the incoming light by 13 stops.
therefore I sandwiched B&W ND Filter 103 and 110.
I haven't calculated it but maybe you can try to sandwich two 110 Filters to extend your exposure..
I also worked with Baader Solar Foil but I had really bad reflections with that.


Am 02.11.2010 um 17:10 schrieb Aditya Mandayam:

> 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:
> http://photo.net/black-and-white-photo-film-processing-forum/00XKLr
> 
> 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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