Archived posting to the Leica Users Group, 2006/04/16
[Author Prev] [Author Next] [Thread Prev] [Thread Next] [Author Index] [Topic Index] [Home] [Search]Eric, Exposure would be the easy part. Just for example you get a base reading of 1 sec at the given aperture. A ten stop filter would get you to 16 minutes. Stack another ten stop filter and you get about 33 hours. At this point minor timing changes will not have a serious effect as you would have to double or quadruple the exposure due to reciprocity failure. So, I would start with a slow film, a small aperture, and your 10 stop filter and bracket at 10, 20, 40, and 80 minutes. Bring a good book or another camera and enjoy the time. Don don.dory@gmail.com On 4/16/06, Eric Korenman <faneuil@gmail.com> wrote: > > Can't remember his name. Wish I could provide a link to images. > I thought about stacking filters and a pinhole too, but how to even begin > to > roughly calculate the exposure time?! Any gear heads out there to run the > math? > > Darkest filter I've got is a 10 stop filter. > > Eric > > > On 4/16/06, Don Dory <don.dory@gmail.com> wrote: > > > > Eric, > > So, where do I see the images? At the last LUGfest in NYC now more than > a > > few years ago I saw the camera that he was using at MOMA and always > wanted > > to see the results. > > > > My guess would be a large format film with a very dark ND filter and a > > near > > pinhole aperture. I think that you could stack several ND filters as > the > > effect would be a geometric series. F256 on a 50 ISO film with a sixty > > stop > > effective filter would get you into a pretty long exposure. Figure out > an > > extreme compensating developer and Pat's the bunny. > > > > Don > > don.dory@gmail.com > > > > > > On 4/16/06, Eric Korenman <faneuil@gmail.com> wrote: > > > > > > There is a photographer out there who works in u-l-t-r-a long > exposures. > > I > > > mean on the order of months to years. > > > He documented the building of the new MOMA in NYC. > > > They are quite amazing images. > > > > > > In short - HOW do you do that? > > > IE How do I do that?? > > > > > > Eric > > > > > > _______________________________________________ > > > Leica Users Group. > > > See http://leica-users.org/mailman/listinfo/lug for more information > > > > > > > _______________________________________________ > > Leica Users Group. > > See http://leica-users.org/mailman/listinfo/lug for more information > > > > _______________________________________________ > Leica Users Group. > See http://leica-users.org/mailman/listinfo/lug for more information >