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My Summaron LTM, bought from Scrapbook on this forum a while ago, (plus a SBLOO, a gift from Pyrogallol!). Although the s/n indicates it should be a 1960 M version according to the wiki, it has a minimum focus mark of 1m/3'4", so I assume it's an original screwmount. Marked German-made. It feels right at home on my Barnacks, though I occasionally switch to a W-Nikkor 3.5cm f/2.5 and, to be really minimalist on a Leica Standard (avoiding the external VF), a Summitar 5cm.

 

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Edited by LocalHero1953
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46 minutes ago, LocalHero1953 said:

- if that is correct.

None of these lists are really  correct. Thiele gives 1960 for the batch with 1783xxx. And you never can be sure whether it is an original LTM or M version by the serial number. The minimal focal distance is much more indicative. People in the German forum have tested whether an M-version with the original adapter screwed off will focus correctly: it doesn't as the adapter fitted at the factory is different from the usual LTM-to-M-adapter. 

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2 hours ago, LocalHero1953 said:

1961 according to the wiki - if that is correct.

You are correct Paul. I was getting confused with my LTM 50/1.5 Summarit, which is 1959 or just pre-Summilux. 

Wilson

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5 hours ago, UliWer said:

People in the German forum have tested whether an M-version with the original adapter screwed off will focus correctly: it doesn't as the adapter fitted at the factory is different from the usual LTM-to-M-adapter.

With all respect to the people who did the test, I do not believe the result. If you look side by side at an original LTM and a M summaron 35mm f2.8 with its adapter removed you will see their barrel is identical to the point that the LTM version base is (uselessly if used on a LTM body) machined as to fit in the adapter of the M version.

edit:

Maybe they tried with the M3 version, then the failure was expected.

Edited by Jul
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2 hours ago, Jul said:

With all respect to the people who did the test, I do not believe the result. If you look side by side at an original LTM and a M summaron 35mm f2.8 with its adapter removed you will see their barrel is identical to the point that the LTM version base is (uselessly if used on a LTM body) machined as to fit in the adapter of the M version.

edit:

Maybe they tried with the M3 version, then the failure was expected.

That is what I feel they meant, that you cannot unscrew the spectacles, leaving an M39 mm thread, which will mount on an LTM but cannot focus correctly, as the rangefinder expects to operate through correction lenses. 

Wilson

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