summicron 50 collapsible LTM range patch not aligned

[Rob-F]

So it's just the ordinary matte finish Scotch tape? I use it all the time!

 

[jonmanjiro]

with the same scale indicated on the lens, it is in focus on my m2's rf, but off on my a7 at F2. (aiming on the same target with a tripod)

would the film have a wider DOF than digital sensor? i havent finished a roll and will see how it affects on still image wide open on film.

thanks

Film is definitely more forgiving than digital.

Is the lens focusing in front of the focus target at f2 on your a7???

If so, I wouldn't hesitate to grind down the focus cam on the rear of the lens (I've done it before on several lenses successfully) 😀

 

[Beemermark]

I always wonder, have you actually taken photographs, enlarge them to a realist size and found them to be out of focus when using the rangefinder?

 

[edwliang]

I always wonder, have you actually taken photographs, enlarge them to a realist size and found them to be out of focus when using the rangefinder?

first roll for this newly bought lens was just developed and will scan later. 😱

 

[edwliang]

I suspect your local repairer is wrong. Very interesting he/she would say that.

Please don't grind anything on the lens. I doubt that is the appropriate solution. A very thin shim on the face of the adapter is a good start. I think Magic Tape is the same as Scotch Tape here in the western U.S. You can apply the tape (as a single layer, no overlapping strips) to the outer face of the adapter (the part that will mate with the lens when screwed on). It could then become a "permanent" repair for you.

As mentioned in other posts, I suspect the lens may have been "serviced" at some point in its history, and reassembled incorrectly. Its unusual for lenses to be "knocked out of standard" with a bump or drop and not have very obvious collateral damage.

If you want to have the lens calibrated to factory standards, there are a number of well-known Leica technicians who can do that. You'll see the big names here on RFF frequently and they are all good. For this particular issue, I can suggest Youxin Ye as probably the lowest cost with perfectly good work. There are also numerous quality repair techs scattered about the globe whose names we don't often see here, but I suspect your local repair person is not terribly well-informed about rangefinder cameras.

Youxin Ye is in Massachusetts. You'll find him with a Google search on his name.

Thank you very much for the advice.

 

[David Hughes]

i contacted my local repairer and he said this problem could not be fixed. i may ask other repairers.

Hi,

In your shoes I'd try another repairer. This is a common problem because people will imagine camera and lens repairs can be done at home. Perhaps they can be if you are a retired camera technician and have a good toolbox and years of experience.

But I have my doubts after reading dozens of posts like these.

Regards, David

 

[DSB]

I posted a similar problem last week regarding a Canon f/1.5.

https://www.rangefinderforum.com/forums/showthread.php?t=164091&highlight=Canon+f/1.5

The difference is that I can not reach infinity in the focusing patch. I as not able to put a test roll through this week but did look at a few rolls that I shot last year, and there were shots in focus at infinity. The catch is that I did not notice the focusing patch misaligned when I shot them. Seems like I would have because I was doing a comparison between the canon and a 50mm heliar. It was only after the lens was returned from a CLA that the focusing patch issue was noticed. When I mentioned it the the repair person the reply was "Some lenses have variation at infinity, this is not adjustable, lenses went off factory this way." It's an annoying problem, but hopefully I will be able to focus normally without issue.
I am curious to see if you are able, or need to resolve your issue. Good luck.
-David