Re: [Leica] rangefinder image

[Amilcar de Oliveira <amilcar@domain.com.br>]

This matter about vertical adjustment has been talked about in the LUG before.
For your reference, should you want to search the archives, here is a message
I've saved. I suggest that whoever tries to adjust the range finder should first
fit an eyepiece magnifier to the camera.

Amilcar

>Subject: How to adjust the rangefinder, was: Response from Leica
>Tue, 16 Sep 1997 13:12:40 +0200
> From: c.blaue@bmsg.de
> Reply-To: leica-users@mejac.palo-alto.ca.us
>To: leica-users@mejac.palo-alto.ca.us




>Ferdinand,

>thank you for sharing the answer with us.
>In my experience Leica has always been as helpful as possible. My M6 has a
>slight vertical deviation and I wanted to remove the red logo sticker to adjust
>it, since the sticker was not very tied either.

>I called Leica to ask what glue to use, since I heard on this board about some
problems.
>Guess what: the next day I had two logo stickers in the mail (and the info
>about the new polfilter coming).

>When I tried to adjust the finder I called Leica again (I didn't ask the first
>time for advice) and they told me that adjusting the vertical alignment
>1) needs special tools to adjust an excenter
>2) changes the horizontal alignment

>So I will rather bring it to somebody who can adjust it.

>BTW: even the best cars need adjustment. It is different from a breakdown, >and
my M6 still works well, can be used (even with the Noctilux).

>christoph



John Collier wrote:

> on 22/1/00 12:41 am, Mark Rabiner at mrabiner@concentric.net wrote:
>
> > "Andrew M. Moore" wrote:
> >>
> >>> I use a regular small screwdriver but one with a right angle bend on
> >>> the end of the shaft or a 30 degree cut off on the tip might be a
> >>
> >> I looked closely at the adjustment screw, and I'm not sure that we're
> >> all talking about the same type of rangefinder adjustment.  It sounds
> >> like the screw you're referring to is the slotted screw closest to the
> >> focusing cam, which looks like it might adjust the focus point (by
> >> rotating the "off-axis" circular cam that encompasses the screw?)
> >>
> >> I've been talking about an adjustment that cure the rangefinder
> >> patch images from being misaligned vertically -- one of them appears
> >> above the other -- that is, on a different horizontal plane -- so
> >> even though my focus may be dead on, I can never see the two images
> >> line up perfectly no matter where I focus.
> >>
> >> Are we referring to the same adjustment?
> >>
> >> --Andrew
> >
> > No in my previous post I was talking horizontal. I believe with the m6 the
> > vertical is trickier perhaps needing to go in through the red dot. Too rich
> > for
> > my blood.
> > I hope I have not confused anyone or been off the point.
> > This was all described by someone better than I have in the archives. Might
> > have
> > been Tom A.
>
> Well I took the access screw out of my M2 and my M4-2 (black chrome screws
> scratch very easily) and the vertical adjustment screw is there on the M2
> but missing from the M4-2. The hole for the screw is still in the arm but it
> is not threaded anymore. I do have a M2 repair manual which goes into some
> detail on how exactly to set up the rangefinder. There are three adjustment
> points: one being the an eccentric cam securing the roller (this the one I
> tweak), two an eccentric cam on the pivot (this is the one where you use the
> screwdiver/locknut tool though the bottom hole)and finally the eccentric cam
> and stop arm to limit travel. You use the two main adjustments to "balance"
> the focus mech at 0.7m, 1m, 10m and infinity. So maybe just tweaking only
> one is not such a great idea. If anyone can provide us with a technique for
> screwing up (adjusting) the vertical adjustment on the M4-2 and up cameras
> that would be great. Maybe the fact we are discussing this triggered an
> expectation of more M repairs and that is why the shares shot up.
>
> John (anything to help Leica) Collier