William Robb <[EMAIL PROTECTED]> wrote:
> From: "Alan Chan" <[EMAIL PROTECTED]>
> >
> > I don't know about this. The original owner said the split
> image gave
> > correct focus (that means the middle part of the mirror). By
> altering the
> > mirror rest (held by 2 screws) under the mirror, the middle
> part of the
> > mirror would be risen (that means the split image will no
> longer give
> > correct focus, and only part of the mirror will give correct
> focus).
>
> Basic geometry Alan. If the bottom of the mirror is not in the
> correct spot, then the top will not be either. Nor will the
> middle. I suspect if Giafranco checks, he will find his focus at
> the middle of the screen is slightly out. This can be checked
> quite easily with a focusing screen at the film plane. My
> service guy tells me that the top pivot point of the LX mirror
> is also adjustable, though not easily. It is, apparently,
> calibrated at the factory, and gives very few problems. It is
> the bottom rest that is problematic with the LX.
> Anyway, it is certainly worth bringing the mirror into alignment
> with the bottom adjuster and checking for critical focus at the
> film plane prior to having the camera stripped for a major and
> expensive overhaul.
> William Robb
Hi guys,
Thanks to you all.
To Bill: I'm afraid the problem you had with your third LX is the same I had
with my second one. The focus was almost impossible in every point of the
frame; focusing the lens at infinity the image was very slightly out of focus
in the lower part of the frame and the focus got worse toward the upper part.
It was due only to the bottom rest, of course.
I already made a dozen of shots with the last LX and the focus, using the
centre of the frame, appears good. I've also made some side by side comparison
with the three cameras by mounting them on a tripod, focusing on the same
subject (at 0,5m) and using the same lens. The distance shown on the scale of
the lens was the same. Only the third LX shows this unusual problem if you try
to use the matte surface.
Now I'm going to check what Rob suggested, if there is some debris where the
screen rests.
I'm already scared by the price of a simple CLA on an LX... I really have the
creeps thinking about the camera completely stripped....
Argh!
I'll let you know what comes out.
Gianfranco
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