LTM to M Adapter

[epand56]

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Looking at the picture, can someone tell me if this LTM to M adapter can be 6 bit codified?

Looks like it features the trench to do that, but I'm not sure.

Thank you.

 

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[jbl]

From that example, I can't tell. If it doesn't look like it, I'd assume not.

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[jdlaing]

If it's for use on the M it looks to have the infamous cutout that won't cover the bit reader on the body.

[pop]

If it's for use on the M it looks to have the infamous cutout that won't cover the bit reader on the body.

 

That does not matter any more with the new firmware. However, the 6 bit code would occupy the position of the cutout. I don't see how you possibly can code that.

Edited July 8, 2014 by pop

[mmradman]

Try e**y, there are LTM to M adapters with 6 bit pits, one example.

 

6-bit Code M39 mount lens to Leica M adapter 50-75 75mm M6 M7 M8 M9 | eBay

[jdlaing]

That does not matter any more with the new firmware. However, the 6 bit code would occupy the position of the cutout. I don't see how you possibly can code that.

 

.......and that is where the 6 bit code would go.

[lct]

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the 6 bit code would occupy the position of the cutout. I don't see how you possibly can code that.

+1

[pfhrased]

Just don't get a cheap adapter - the one that came with one of my LTM lenses didn't lock into place properly and pushed the rangefinder calibration out.

This is in contrast to the voigtländer one that is fantastic and has never given me any trouble.

[jbl]

I just got a metabones one. Has anyone had issues with those?

[jdlaing]

I just got a metabones one. Has anyone had issues with those?

 

I think the Metabones adapters all have the cutout too.

[lct]

Italian one here:

6 Bit LTM Raccordo per ottiche M39 a fotocamere LEICA camma 50-75 - ID 4878 | eBay

I don't read Italian unfortunately.

Does it look interesting?

[jbl]

The one I got has a photo on the website that shows the grooves.

[Ecar]

I bought many LTM to M adapters over the years. Some cheap, other expensive. Typical issues include failure to bring up the right framelines, slightly bent flange and/or inaccurate thickness affecting focus, as well as misplaced code pits (where present). Unless you intend to use your LTM lenses on screwmount bodies as well, I have found that the key is actually not the choice of the adapter itself (as long as it works and is not bent or uneven), but to have the lens adjusted with the adapter that you are going to mount on it, so that slight differences in flange thickness are taken care of.

The Voigtlander ones are excellent, but relatively expensive. If you want the 6-bit code pits, I have found the jinfinance ones on the Bay to work well with most lenses. Others may have different experiences.

[friedeye]

As said above, that adapter is a type 1 that's used for older Leica ltm lenses with an infinity lock and cannot be coded.

 

Voigtlander, in my experience, makes the best adapters - although I have had luck with the inexpensive Chinese versions.

[menos I M6]

Stay away from all adapters except:

 

- Leica adapters (cannot be 6-bit coded, as they do have the infinity lock cutout interfering with the 6-bit position)

- Voigtlander adapters (produced by Cosina in Japan) - their v2 adapters can be 6-bit coded (the grooves would have to be milled)

 

Unfortunately I received bad news recently that Cosina stopped production of their Voigtlander branded Adapters. Availability in shops is already scarce and prices are on the rise for remaining stock.

 

I live in Shanghai/ China and over the last few years have bought, tried, modified probably most of the cheaply offered adapters you can find on eBay.

My general summary: stay away from them, be it no-name, or Chinese brands, they all are made to the same questionable standards and finding an adapter that works as designed is a gamble.

 

I do CLA and calibration work on vintage lenses and in that process have used an abundance of different adapters in testing and calibration.

 

Believe it or not the very only ones, working perfectly on any manufacturers L39 standard lenses EVERY SINGLE TIME are:

 

Voigtlander and Leica (preferably new production, not vintage).

 

 

The cheap adapters can work ~ok-ish in combination with slow wide angle lenses, as long,as they do not interfere with the RF mechanism of the camera body and as long, as they call the correct frame line, lock properly (not all do - BE CAREFUL) and do have the correct L39 thread orientation (many are slanted and will result in your lens being off center (critical with many vintage telephoto lenses, which use an RF tongue coupling, rather than a cam, which then will not properly engage with the camera's RF roller).

 

… I think you get the meaning.

[lct]

Italian one here:

6 Bit LTM Raccordo per ottiche M39 a fotocamere LEICA camma 50-75 - ID 4878 | eBay

Just ordered one of those Italian adapters for a Skopar 50/2.5. I will code it as a Summarit 50/2.5 if it works (hopefully).

[Erik Gunst Lund]

... lock properly (not all do - BE CAREFUL) and do have the correct L39 thread orientation (many are slanted and will result in your lens being off center (critical with many vintage telephoto lenses, which use an RF tongue coupling, rather than a cam, which then will not properly engage with the camera's RF roller).

 

… I think you get the meaning.

 

Some (Most) Voigtlander L39 (LTM) lenses have extra threaded holes for adjusting the L39 'thread orientation' to avoid this issue,

You remove the mount and locate these as three sets of threaded holes close to each other.

Don't loosen the ring for infinity adjustment, distinguished by having slots for the screw heads to slide in....

[jbl]

I received the Metabones adaptor today and it’s good. The lens focuses perfectly. The six-bit coding grooves don’t seem to work, though I may be doing it incorrectly.

 

I used the Zebra pen that comes with the Match Technical coder kit to fill in the grooves on the adaptor, but the camera still seems to think it’s uncoded. I checked with both an M240 and an MM.

 

You just have to fill in the grooves that need to be black, right?

 

-jbl

[menos I M6]

Fill both types of holes. The 6-bit reader has troubles with reflections from the chrome plating of the mount.

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Hallo,

Look here: Leica M

[lct]

Not mine i must say. Been using black permanent marker only and it works fine with both my M8.2 and M240 bodies when applied on drilled pits or the recessed part of late CV and Zeiss flanges. FWIW.