LTM to M adapter crooked?

[acjeske]

I'm new to adapting lenses. I just found a Voigtlander 50/2.5. I got a Fotodiox LTM to M adapter from Amazon.

The adapter goes on the 50. The whole thing goes on my M10 and M3. But it both cases the lens doesn't end up where it's supposed to. It needs to turn on another half inch or so but it's already in and locked on. So the focus tab is too far the the left from where the action should be.

Is the adapter the problem? The lens? How I attached them? I'm stymied and can't find info about this. Help?

 

[xayraa33]

I'm new to adapting lenses. I just found a Voigtlander 50/2.5. I got a Fotodiox LTM to M adapter from Amazon.

The adapter goes on the 50. The whole thing goes on my M10 and M3. But it both cases the lens doesn't end up where it's supposed to. It needs to turn on another half inch or so but it's already in and locked on. So the focus tab is too far the the left from where the action should be.

Is the adapter the problem? The lens? How I attached them? I'm stymied and can't find info about this. Help?

If the threading in the adapter is not cut right or even dented this could happen...try an other make of adapter....you can't go wrong with a Leitz made one or one made by CV.

I use to buy used Leitz adapters at camera shows for 50 bucks and never had a problem with them like I did with the lower priced off brands or the recent cheapo made and cheapo priced Chinese ones with fancy names.

 

[Bill Blackwell]

The focusing mechanism on most LTM lenses is such that they should be "correctly" set on the M mount adapter at around the 11 O'clock position on the lens mount; if it's locked into place there you should be good. You can verify this by focusing on a close object (lens wide-open) and verifying it on your live view screen - or Visoflex, if you have one - on your M10.

 

[Phil_F_NM]

Return the adapter, get a Voigtlander or genuine Leica one. Those two brands rarely have the threads cut wrong, maybe off by a couple millimeters, but not as much as your description.

Phil Forrest

 

[Chriscrawfordphoto]

There are a lot of bad LTM-M adapters out there. The ones made by Leica or by Cosina (Voigtlander) are the best, but even they're sometimes bad. I have a genuine Leica adapter on my desk that is 1/1000 of an inch too thick (yes, I measured it with a micrometer). That tiny amount is enough that lenses on it will not focus to infinity.

 

[jordan.dickinson]

I had the same problem and had to buy a legit Leica adapter. Fixed the problem right away. Haven't tried other brands, but I definitely understand your frustration with a poorly designed adapter

 

[leicapixie]

I had a Canon 35mm LTM lens and Leica adapter, many years ago.
The lens did NOT line up at 12:00 but further around!
It was correct as one could then see the f-stop in viewfinder, at right side.
Lens focused perfectly and was a very good lens.

 

[RichC]

I had a Canon 35mm LTM lens and Leica adapter, many years ago.
The lens did NOT line up at 12:00 but further around!
It was correct as one could then see the f-stop in viewfinder, at right side.
Lens focused perfectly and was a very good lens.

^ This.

Been a while since I owned a rangefinder but some lenses were designed to lock before reaching the top for this reason. Can't recall which lenses/makes this applies to.

 

[Sonnar Brian]

https://www.ebay.com/itm/Leica-L39-...mera-L39-LM-for-50-75mm-Adapters/264264088494

The Yeenon adapters are higher quality, note the shim of the adapter is on the backside. This is similar to the Voigtlander and original Leica adapters. I bought two of these, they worked perfectly.

 

[acjeske]

Thanks everyone. I guess I'll try another (better) adapter.

 

[xayraa33]

Just to be doubly sure and if you don't have a purely LTM mount test camera at hand....examine the threads on the lens mount of your CV 50mm f2.5 lens to see if you got damaged threads.

Use a loupe or any magnifying lens to see if you can spot any damage or debris on the lens mounting threads.

 

[Darthfeeble]

I have several non-leica or CV or Rayqual adapters that are obviously very cheap. They all index the lens off center but they all work just fine on my M9. Most are on my wider lenses and focusing to infinity doesn't seem to be a problem, but I might not be that critical.

 

[Godfrey]

Thanks everyone. I guess I'll try another (better) adapter.

I have both CV and Rayqual LTM->M-bayonet adapters. Neither have ever presented any difficulties, and align the lenses properly for the rangefinder cam. The newer Rayqual ones also have a machined area that I can paint for the six bit code used with the digital M models.

I also have one or two older Leica adapters ... some of these can cause some problems having to do with six bit code by presenting partial visibility of the code area. This can throw off the camera settings on some digital models (Ms or SL/CL/TL variants when the Leica M Adapter L).

G