Archived posting to the Leica Users Group, 2006/04/18
[Author Prev] [Author Next] [Thread Prev] [Thread Next] [Author Index] [Topic Index] [Home] [Search]Reciprocity at extremely long exposures would have to come into play - don't you think? Regards, George Lottermoser george@imagist.com On Apr 16, 2006, at 11:11 AM, Don Dory wrote: > 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 >> > > _______________________________________________ > Leica Users Group. > See http://leica-users.org/mailman/listinfo/lug for more information