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Ulrich W.
uwittehh
Germany
837 Posts
My Collection
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 Posted - May 01 2015 : 03:24:03 AM
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I have heard of this before but I have never seen what damage it can do. Here you can the it on a rangefinder of a Leningrad. The camera does not work, so I opened it. To get to the shutter you have to remove the rangefinder. It comes in parts off and cracks in my hands :-(
Ulrich
http://fotos.cconin.de |
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jed
France
391 Posts
My Collection
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Posted - May 01 2015 : 03:45:59 AM
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| Quite impressive ! Maybe Cyanoacrylate glue in between cracks will help ? |
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Ulrich W.
uwittehh
Germany
837 Posts
My Collection
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Posted - May 01 2015 : 08:06:04 AM
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Jed, I don't think that this will help. The entire structure of the Zinc is broken if there is Zinc pest in it. It is the result of bad or with dirt contaminated alloying and is not stoppable.
Ulrich
http://fotos.cconin.de |
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Jacques M.
France
2604 Posts |
Posted - May 01 2015 : 08:12:43 AM
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I think too.
I had an early Foca, a French camera made in zamac (zinc, aluminium, manganese and copper). Many parts of this camera were gradually desintegrated into a white powder. Heart breaking.
Jacques. |
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Vladislav Kern
Vlad
USA
4252 Posts
My Collection
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Posted - May 01 2015 : 09:35:19 AM
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Ulrich, I've never heard of this before, can you expand on what causes this exactly?
Thanks,
Vlad |
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xya
France
159 Posts |
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Vladislav Kern
Vlad
USA
4252 Posts
My Collection
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Posted - May 01 2015 : 11:37:25 AM
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Thank you! Learned something new today!
Cheers,
Vlad |
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Robert Vonk
Fotohuis
Netherlands
100 Posts
My Collection
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Luiz Paracampo
Luiz Paracampo
Brazil
2002 Posts
My Collection
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Posted - May 01 2015 : 3:46:06 PM
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Ok with a enormous patience we can restore this Leningrad Rangefinder.
Your cradle is still in good condition I picked some worse than this.
I did this kind of restoration in some cameras
First we can restore all structure by emerging the whole metal unit and metal parts in a solution of Carbon tetracloride and Methyl Cyanocrilate glue.- suficient to obtain a complete penetrating fluid
This penetrates the Zamak mass and stops oxidation carefully reglues all parts in order to recompose the structure
the important point is recompose the bottom plane scratching in a sand paper over a plane glass further remount glass parts again.
I am just preparing a complete explanation of the Leningrad rangefinder working which is essential for the recalibration and correct working. As soon it will be ready I will post it.
Regards
LP
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Luiz Paracampo
Luiz Paracampo
Brazil
2002 Posts
My Collection
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Posted - May 01 2015 : 3:47:41 PM
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Jed came near the solution!
LP |
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levonsa
levonsa
Russia
248 Posts |
Posted - May 01 2015 : 5:39:29 PM
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Ulrich Hello!
No need to reinvent the wheel!
About this rangefinder is better to forget all!
Write me an email. I'll give you another normal rangefinder camera Leningrad. |
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Ulrich W.
uwittehh
Germany
837 Posts
My Collection
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Posted - May 07 2015 : 2:39:59 PM
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Levonsa, thanks, but there is no need that you send me a rangefinder. I had two broken Leningrads and made one working of them :-)
Ulrich
http://fotos.cconin.de |
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Topic |
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Zinc pest
