Leica M6, rf out of alignment with 50mm summicron

[zabo69]

hi,

On my leica m6 when focusing to infinity with my 50mm summicron rigid i can't match the patch with the image, i always stay short. I thought it could be a missaligned rf, but when use the jupiter 12 every thing is aligned. it is norma? what distance is considered to be inifinity for the summicron 50mm rigid? the moon? 🙂
it is a out of alignment rf ? shoul i align to the summicron and forget the jupiter 12 alignment or could be a lens problem?

Regards,
avelino

 

[michaelwj]

I had a similar problem except at the close end. A RF adjustment by the local tech was required. I think the cam itself was loose. All lenses work ok now. I think the tolerance on the summicron might have been tighter.
I recommend an adjustment.

 

[zabo69]

I had a similar problem except at the close end. A RF adjustment by the local tech was required. I think the cam itself was loose. All lenses work ok now. I think the tolerance on the summicron might have been tighter.
I recommend an adjustment.

But it is normal that with the jupiter 12 all is fine?

 

[ottluuk]

But it is normal that with the jupiter 12 all is fine?

There are a couple of possibilities:
* your Summicron needs adjustment, body and J12 are OK
* body is off spec but matches J12 that's off Leica spec by a similar amount

 

[zabo69]

how can i test this?

 

[De_Corday]

A known-accurate M body

 

[zabo69]

A known-accurate M body

that will be hard, i don´t have and don't know anyone with one. 🙂
thanks.

 

[MISH]

where do you live?

 

[Rob-F]

Have you had the lens for a long time, or is it new to you? A previous owner might have had it worked on, and the helicoid might have been reassembled wrong. That will throw it seriously off!

 

[zabo69]

where do you live?

Porto,Portugal

 

[zabo69]

Have you had the lens for a long time, or is it new to you? A previous owner might have had it worked on, and the helicoid might have been reassembled wrong. That will throw it seriously off!

it is new to me, i have it for year, but the focus is ok, only the focus patch is off. even full open the focus is ok, close focus at least.

 

[Monochrom]

Hi, my advice...adjust infinity with the summicron then perfomr some simple accuracy tests. You´ll know right away

Whats the difference tween the two lenses? 1/15th of the rf patch or 3/4th?
The j12 can live with some difference but not the cron.

 

[rlouzan]

Avelino,

You don't lose anything by asking ... 😉

Boa sorte!

Leica - Aparelhos Opticos de Precisão, SA


Telefone:252 330 300Telefone

Ribeirão
4760-721 Ribeirão
GPS: 41.360771, -8.566618

Fax: 252 312 404

 

[zabo69]

How can i adjust the infinity focus in that focusing arm in the Lens chamber of the body?
I think that there is a thread about that

 

[michaelwj]

But it is normal that with the jupiter 12 all is fine?

For me, my other lenses were fine, and my 50 cron (that didn't work on my body) worked on others perfectly.

To see whats happening, it can be useful to open the back door and look at how the cam moves.

I started a thread on LUF that might be of help:
http://www.l-camera-forum.com/leica-forum/leica-m-lenses/352597-m6-50v3-cron-close-focus-issue.html

 

[zabo69]

What distance should i consider as infinity for the 50mm f2 summicron rigid, to tune the patch?

 

[Beemermark]

Go out at night an focus on a street lamp at least a 100 meters away.

 

[zabo69]

I have adjusted the infinity focus in the focus arm for the summicron.
I have a black jupiter 8 that at infinity moves the arm to much that it passes the infinity. I can use sandpaper to remove a little bit of the lens focus rear tube to prevent not moving the arm to much? the lens is focusing correctly.