Archived posting to the Leica Users Group, 1998/03/24

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Subject: Re: [Leica] Rangefinder misaligned at infinity?
From: Dan Cardish <dcardish@microtec.net>
Date: Tue, 24 Mar 1998 21:52:55 -0500

At 04:28 PM 24-03-98 -0800, Jim Laurel wrote:
>A friend of mine and I were discussing this the other day and I've heard
>others ask the question a few times, so I thought maybe some of you old
>rangefinder hounds could shed some light...
>
>When I set almost any of my M lenses at infinity, the rangefinder shows
>objects at infinity to be just ever so slightly out of alignment.  I mean
>really slightly.  This happens with both of my M6s (one standard, one HM),
>as well as my Mamiya 7 and an old Canon G-III rangefinder I've had for ages.
>My friend's M6 does the same thing.  Is this just normal for rangefinder
>cameras?  And if so, what do you trust for an infinity shot -- the lens set
>at infinity, or backing off the focus just a bit to line up the ghost images
>in the rangefinder patch?

I've noticed this also, but have gradually reached the point where I can
live with it.  ;-)  My older M6 seems to focus exactly where the
rangefinder indicates, in spite of an apparent mis-alignment at infinity.
My newer M6HM seems to exhibit exactly the same 'problem', if it really is
one.   It also seems to be a function of which lens happens to be on the
camera, so it may be more a problem with a particular lens than the camera
itself.  

Dan C.