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Summitar M39 on Leica 240


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9 replies to this topic

#1 Emref

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Posted 10 December 2017 - 22:37

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Hello

I have a collapsible Summitar M39, I like it very much because of his focus button, I´m used to it with my 3f Leica.

I have the adapter m39 to M, is possible to use this lens in my 240?, can be collapsed?

Thank you very much

Alberto


Edited by Emref, 10 December 2017 - 22:40.


#2 jdlaing

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Posted 10 December 2017 - 22:39

(Withdrawn)

Edited by jdlaing, 10 December 2017 - 22:41.


#3 jdlaing

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Posted 10 December 2017 - 22:41

What focal length Summitar?

If it is a 50 it will work fine. Best to mount it while not collapsed.
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#4 otto.f

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Posted 10 December 2017 - 23:14

When the lens cap (rear) is mounted it is not fully collapsed, if you mount the lens on the body in the position it has when you unmount the lens cap, there is no risk at all.
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#5 Emref

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Posted 10 December 2017 - 23:15

What focal length Summitar?

If it is a 50 it will work fine. Best to mount it while not collapsed.

Sorry it is a 50

 

Alberto



#6 Emref

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Posted 10 December 2017 - 23:17

When the lens cap (rear) is mounted it is not fully collapsed, if you mount the lens on the body in the position it has when you unmount the lens cap, there is no risk at all.

And not collapse it in the future?

Alberto



#7 otto.f

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Posted 10 December 2017 - 23:18

Yes you can once mounted, the greatest risk is mounting it fully collapsed, but once mounted you can collapse it
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#8 Emref

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Posted 10 December 2017 - 23:21

Thank you very much jdlaing and otto.f

 

Alberto


Edited by Emref, 10 December 2017 - 23:21.


#9 jdlaing

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Posted 11 December 2017 - 00:55

And not collapse it in the future?
Alberto


Mounted it will collapse without hitting anything.
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#10 UliWer

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Posted 11 December 2017 - 01:08

You can try with a film M looking from the rear throgh the opened shutter. When you collapse a Summitar you’ll probably see that it hits the little wheel for the rangefinder - it will not touch the shutter.

Though this is the same for more than seventy years. When I collapse a Summitar in a Leica II or IIIf I realize some resistance which goes away after some slight pressure. The summitar has a ridge at the end which is broader than other collapsible lenses, so it will most likely hit the little wheel, with other collapsible lenses it is more „hit and miss“.
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