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LTM to M Adaptor Question


codocee

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I have a Jieying LTM to M mount adaptor that says 50-75mm with notches for coding. I want to try out my collapsible 3.5 summaron on my M8 but am concerned about using this adaptor. I recently had a roller cam issue with my M8 and had to send it in for over $500.00 repair and CLA. Could the adapter have caused the cam issue?

What is it that makes the adapter specific to 50-75mm or are all LTM to M adapters the same, regardless of stated focal length.

The last thing I want to do is mess up the M8 again

To mount or not to mount- That is the question!

 

Thank You

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Not sure what lens you're referring to exactly as i've never heard of collapsible Summaron so far but i may be wrong. Anyway i would avoid low-end adapters for sure but i would check if your lens has an infinity lock before ordering a Voigtlander adapter because some of them don't fit well with the latters if i'm not wrong.

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What is exactly the Summaron 35 you want to use ? (btw, there is not a collapsible Summaron) ; if it is the A36 version, it has the old-style focus knob, so that the LTM adapter must have a cutout along its outer profile (and the cutout prevents the 6 bit coding "strip"); otherwise , if it is the later version with E39 filter mount, there is no problem with any adapter, provided that it activates the 35 frameline, which your 50/75 adapter does not (it's a matter of the length of an internal "blade" which engages into the bayonet mount and activates a certain frame) . Leitz original and the currently available Voigtlander are indeed the best ones.

 

BTW, the A36 version is also a bit problematic on M8 for the question of the UVIR filter... you need an adapter to mount a std. E39 filter... or you have to make a patient DIY job to mount an UVIR glass on an old A36 filter mount...

Edited by luigi bertolotti
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Could the adapter have caused the cam issue?

 

The adapter shouldn't touch the cam at all, so unless it is ludicrously out of specification it can't be that. Try it and observe, put the adapter onto the body without the lens and see if anything touches when it locks into place, push the cam to see that it moves freely.

 

If you want to try the lens to see what it performs like you can't damage anything by putting it onto the wrong adapter, you'll simply get the wrong frame lines showing, but you can use the preview lever to change them.

 

The price of the adapter makes no difference to its functioning, they don't work better the more you spend, they may however be machined to finer tolerances if you believe the rumours (although why anybody would set up a lathe to churn out thousands of cheap and inaccurate adapters with the possibility they will all be returned is as junk is beyond my comprehension, business is business wherever you work). I have never had a bad Chinese adapter, I have had a Voigtlander adapter that started to shed flakes of chrome plating.

 

 

Steve

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