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

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Subject: [Leica] ULTRA long exposures - months to years!
From: philippe.orlent at pandora.be (Philippe Orlent)
Date: Mon Apr 17 05:41:58 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>

Bookmarked! :-)



Op 17-apr-06, om 14:34 heeft Eric Korenman het volgende geschreven:

> 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!)