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Hello all i have a Leica ii converted to iiia unfortunately i wish to not to be converted and i wonder about this elmar have a nice serial number 138000 or 168000 i can not decipher the serial number , i have around 5 other elmars and it's a bit different the writing is smaller and lightier.

 

Any ideas what i have here?

And where to fix the separation in Europe a good service?

Thank you so much and stay safe!

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Edited by Film Hunter
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  • Film Hunter changed the title to Strange Leitz Elmar 5cm 3.5 from a Leica ii converted to iiia

As it has an IR-Index it might be converted or remounted after appr. 1935. The number is hard to decipher but both are close to 1933 and should match the body. I wouldn't invest in fixing the glas as you have already enough 😉. Shure it is separation in the cemented cell in the back? looks like some other "defect" on front, is it coated?

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This could be 160000 or 163000.

I'll mention 2 50mm/5cm Elmar batches from 1933 that could be relevant 

156501 -160000

163001 - 165000

163000 is supposed to be for a Mountain Elmar, but sometimes you will find items at the edge of batches which are from different model ranges. 

There are many variations of the 50mm/5cm Elmar, at least 25 and probably more.

It is hard to find people who will work on lenses. Leica Classics in Wetzlar will probably quote you a price, but you would probably be able to buy another one for that price or even for less.

William 

 

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it could be 163000 or 168000, but after adjusting the pic it looks like 138000??

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separation in Elmar 5cm happens rare but is possible as well. This is how the rear group in my Elmar was. Warming up the rear group to 90C and pressing  both lenses together helped to distribute canada balsam between the lenses. But you need to disassembly the lens and it does not always work. Alternative is to remove cemented group from the mount, separate completly, clean and re- cement. Pretty complex task.

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12 minutes ago, jerzy said:

This is how the rear group in my Elmar was. 

Very organic looking - quite fascinating. I understand why some may mistake it for fungus.

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vor 1 Stunde schrieb jerzy:

This is how the rear group in my Elmar was.

Jerzy, are you sure that this was separation? I have seen separation in lenses several times, and it never looked like this, not even close. This looks like some sort of fungus to me. Of course, if you heat up the lens group and then press the lens elements together, you will re-shift the still existing Canada balsam, which has softened due to the elevated temperature, into those regions were fungus has 'eaten' the balsam. But that does not mean those structures have been caused by normal lens separation. Lens separation is a mechanical process, and it will in my view not be able to form such organic looking structures.

 

vor 1 Stunde schrieb nitroplait:

Very organic looking - quite fascinating. I understand why some may mistake it for fungus.

As explained above, I would be very, very surprised if it were not fungus.

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vor 4 Stunden schrieb wizard:

Jerzy, are you sure that this was separation?

yes, I am pretty sure. I do not know what was a reason, but I believe that canada balsam dried out on some spots therefore such unusual pattern. Here is another example of separation, this time Summar - notice round spots, again, canada balsam dried. On the right photo lens group is separated

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from my experience fungus may developes another pattern and what I observed it developes on the surfaces that  have air contact. Here is example of M3 rangefiner, fungus was on the prism, behind the first lens (there is approx 2mm air distance between prism and the front lens

 

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4 hours ago, wizard said:

I would be very, very surprised if it were not fungus.

I have never seen fungus develop between the elements of a cemented pair.  Particularly since the pattern is in the center and does not start along an edge of the interface.  But I have been surprised before, especially how fungus can get to the most difficult to reach surfaces and leave other surfaces clean.

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vor 12 Stunden schrieb zeitz:

I have never seen fungus develop between the elements of a cemented pair.

Well, Canada balsam is an organic substance to start with. Perhaps a tiny amount of fungus spore was part of the substance when it was processed at the time, and just needed the right environmental conditions to grow. 

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On 10/10/2022 at 12:20 PM, Film Hunter said:

Thank you guys i have tried with a magnifier and it looks the same ,138 or 168 i dont know, all this photos are with my phone and a magnifier ( i used a projection lens :) ) 

Why not 133000 ? Would match fine : 130248  133506-Elmar 5 cm 1:3.5

 

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