[pure-silver] Re: Light Leaks with Large Format
- From: DarkroomMagic <info@xxxxxxxxxxxxxxxx>
- To: PureSilverNew <pure-silver@xxxxxxxxxxxxx>
- Date: Tue, 29 Nov 2005 17:38:26 +0100
Cor
These pinholes are really tiny. Light coming through them does not get
directly to the film as they are at the bottom of the folds. Incoming light
will have to bounce off the inside of the bellows first to reach the film.
So we have lots of very low exposures, similar to a very small pinhole
camera apertures, and most of it absorbed by the inside of the bellow walls.
The effect seems to be minimal.
I didn't even notice them until sticking a light bulb into the camera,
sealing it light-tight and investigating it in the darkroom. I suspect that
many view cameras have this 'problem' and never causing an issue.
I just can't live with the thought.
Regards
Ralph W. Lambrecht
http://www.darkroomagic.com
On 2005-11-29 09:15, "Breukel, C. (HKG)" <C.Breukel@xxxxxxx> wrote:
> Ralph,
>
> Another option I have tried is the black neoprene stuff they sell in diver
> shops, which they use to repair diver/wet-suits. I had limited succes with
> that though..I am realy surprised about your observation that these pinholes
> did not interfere with the actual exposure! Maybe I have been to hasty with
> replacing my Toyo Field 810M which was realy puuctered with a lot of
> pinholes..;-)..
>
> Best,
>
> Cor
>
>> -----Original Message-----
>> From: pure-silver-bounce@xxxxxxxxxxxxx
>> [mailto:pure-silver-bounce@xxxxxxxxxxxxx]On Behalf Of DarkroomMagic
>> Sent: dinsdag 29 november 2005 0:25
>> To: PureSilverNew
>> Subject: [pure-silver] Re: Light Leaks with Large Format
>>
>>
>> Thanks for the tip Ole
>>
>> I will order and try this stuff (to repair the bellows , of
>> course). It
>> sound very promising.
>>
>>
>>
>>
>>
>> Regards
>>
>>
>>
>> Ralph W. Lambrecht
>>
>> http://www.darkroomagic.com
>>
>>
>>
>>
>>
>>
>>
>> On 2005-11-28 22:09, "Ole Tjugen" <oftjugen@xxxxxxxxx> wrote:
>>
>>> Ralph,
>>>
>>> This stuff works:
>>>
>> http://cgi.ebay.de/Fluessig-Latex-Wahlfarben-hoher-Latexanteil
>> -250-ml_W0QQitem
>>> Z8321186879QQcategoryZ45946QQcmdZViewItem
>>>
>>> Disregarding the other possible uses of it, it can be
>> painted on in a very
>>> thin yet strong layer, and gives sufficient "density" to
>> reduce light
>>> leaks significantly. Follow dirctions in the pack to get it
>> non-sticky
>>> after drying, or your bellows will sick together into one
>> massive lump.
>>>
>>> Don't ask me how I got the idea of trying this stuff for
>> bellows repair -
>>> please :)
>>>
>>> Ole Tjugen
>>>
>>> On Mon, 28 Nov 2005 19:59:57 +0100, DarkroomMagic
>> <info@xxxxxxxxxxxxxxxx>
>>> wrote:
>>>
>>>> Howard
>>>>
>>>> On second thought, I will attempt a repair, what the heck,
>> I have no use
>>>> for
>>>> these bellows if I have to buy a new one anyway.
>>>>
>>>> I did some research on Elastoseal. There are many products
>> with that
>>>> name in
>>>> a variety of spellings (Elasto-Seal, Elastoseal etc), but
>> nothing in
>>>> Germany. I'll try some other rubber-like flexible
>> compound! Any ideas?
>>>>
>>>>
>>>>
>>>>
>>>>
>>>> Regards
>>>>
>>>>
>>>>
>>>> Ralph W. Lambrecht
>>>>
>>>> http://www.darkroomagic.com
>>>>
>>>>
>>>>
>>>>
>>>>
>>>>
>>>>
>>>> On 2005-11-28 18:29, "Howard Efner" <hfefner@xxxxxxxxxxxxx> wrote:
>>>>
>>>>> Ralph, pinholes in the bellows can be a real problem! The ideal
>>>>> solution is to replace the bellows, but a repair will
>> save some cash
>>>>> and extend the life of the bellows. One way to take care of
>>>>> pinholes, and also to repair big holes etc, is to get some black
>>>>> rubber roofing primer ( Snow Roofing Systems Elastoseal -
>> Home Depot)
>>>>> and paint the inside of the bellows to seal the leaks. Use a foam
>>>>> brush! A conventional brush will develop little crumbs of rubber
>>>>> that will come off and stick to the cloth. Let the
>> camera thoroughly
>>>>> dry with the bellows extended ( several days to a week or so
>>>>> depending on humidity) so that the bellows do not glue themselves
>>>>> together. If still tacky, lightly dust with some talcum
>> powder and
>>>>> vacuum out the excess or give a thin coating of the black
>> rubber finish
>>>>> coat.
>>>>>
>>>>> The Elastoseal is a water based neoprene emulsion that drys to a
>>>>> flexible rubber film. Also good for waterproofing darkroom
>>>>> sinks. They also make a white and black top coats that work in
>>>>> darkroom sinks.
>>>>>
>>>>>
>>>>>
>> ==============================================================
>> ==============
>>>>> ==
>>>>> ===============================
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>>>>
>>>>
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>>>
>>
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