Archived posting to the Leica Users Group, 2006/04/17

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Subject: [Leica] ULTRA long exposures - months to years!
From: don.dory at gmail.com (Don Dory)
Date: Mon Apr 17 18:44:03 2006
References: <82c9dd70604160828l27c64031jf70f59d447cf5399@mail.gmail.com> <9b678e0604160837wdbe5771t2130ce51945db1bd@mail.gmail.com> <82c9dd70604160853q3772f6few274e464c4fd62e8d@mail.gmail.com> <9b678e0604160911x1be31213u471bdd4a8f528e1a@mail.gmail.com> <4442F114.6060808@cox.net> <82c9dd70604170534y42a694d6l2c437a542ec3eac8@mail.gmail.com>

Thank you Eric.

Don
don.dory@gmail.com


On 4/17/06, Eric Korenman <faneuil@gmail.com> wrote:
>
> here is a link to an example.
> the artist is Michael Wesely
>
> http://www.artnews.info/gallery.php?i=373&exi=1266
>
> Eric
>
>
> On 4/16/06, Mike Durling <durling@cox.net> wrote:
> >
> > Actually you have to consider the reciprocity failure of the film.
> > Sensitivity gets non-linear at long exposures.
> >
> > Mike D
> >
> > 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
> > >
> >
> > _______________________________________________
> > 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
>

In reply to: Message from faneuil at gmail.com (Eric Korenman) ([Leica] ULTRA long exposures - months to years!)
Message from don.dory at gmail.com (Don Dory) ([Leica] ULTRA long exposures - months to years!)
Message from faneuil at gmail.com (Eric Korenman) ([Leica] ULTRA long exposures - months to years!)
Message from don.dory at gmail.com (Don Dory) ([Leica] ULTRA long exposures - months to years!)
Message from durling at cox.net (Mike Durling) ([Leica] ULTRA long exposures - months to years!)
Message from faneuil at gmail.com (Eric Korenman) ([Leica] ULTRA long exposures - months to years!)