LTM adapter and distance scale alignment

[SteveM]

I've installed a brand new vc 50/75 ltm to m adapter onto a Canon 50/1.8 lens. This mounts with the normal "click" on the camera body (M4-P) and brings up the correct framelines. However, the centerpoint marker for distance (surrounded by aperture values) is not in the normal 12 o'clock position, but more like 1h30pm looking at the front of the camera. Does this happen with adapters sometimes?

Some other info that might be useful: Focus distance seems okay, rangefinder movement seems fine etc. Since the lens is screw thread, it only goes into the adapter at one place. The lens is in excellent condition, with no noticeable wear on the flange contacting the adapter. If the thread entry point had been cut at a slightly rotated location, all would be well. Could this be a manufacturing problem? Any suggestions welcome.

Thanks

Steve

 

[squirrel$$$bandit]

I'm no expert, but it seems to me that most of my M-adapted LTM lenses do this very same thing, without any focus problems. I agree that it is irritating.

 

[Jacob]

It's not the adapter that is the "problem", it's the Canon lens. All my Canon ltm lenses has the distance and aperture mark pointing towards the finder corner of any camera, screw mount or M mount with adapter. That was how they were made, one up side is that You with some lenses can see the chosen aperture through the finder.

Jacob

 

[Artorius]

I have a 50 'cron that is the same. My focus/distance mark is in the 1 o'clock position. I was told it's normal for the older LTM glass. It functions normally except the position of the indicator.

 

[pvdhaar]

On CV screw mount lenses, the mount can be removed from the lens by taking out the four mount retainer screws. Doing so reveals three positions separated ca. 5 degrees for the screws.. You can put the mount back on the lens in the correct orientation for your adapter.

 

[cosmonaut]

I make no difference where the marks are. No different than turning the camera side ways or upside down to take a picture. I have a 75mm Voigtlander that is off slightly from my other lenses. I think the adaptor was just made wrong.

 

[awilder]

All Canon LTM lenses line up that way, even when mounted on their own cameras.

 

[steverett]

All Canon LTM lenses line up that way, even when mounted on their own cameras.

I've found that to be the case as well. I also had some FSU lenses that mounted that way, but I'm not sure it was intentional in that case. 🙄

 

[David Hughes]

Hmmm, the same thing happens with some of my screw thread Leitz lenses going into the IIIa; I'd assumed it was caused by years of tightening them up. So I now guess it can be sorted out easily... Or what? I mean is it simple kitchen table and eyeball engineering?

Regards, David