Re: [Leica] Elmar with sloppy focusing mount

["Dan Post" <dpost@triad.rr.com>]

Howard-
It sounds like there might be a bit of play in the camera's mounting ring. I
think that in some cases, when properly collimated, that there are some
shims that are used under the ring to get the exact mount to film distance,
and if this one of yours has had a CLA at some time, the shim may have been
misplaced. Or the screws may simply be loosened... N'est-ce pas?
Dan
- ----- Original Message -----
From: "Howard Sanner" <flagstad@mindspring.com>
To: "Leica Users Group" <leica-users@mejac.palo-alto.ca.us>
Sent: Saturday, October 20, 2001 10:39 PM
Subject: Re: [Leica] Elmar with sloppy focusing mount


> >I was playing with a "new" IIIf today, and thought that the
> >infinity focus was way off, but it turned out that the 50mm
> >Elmar on it had a really sloppy focusing mount.  If I pushed the
> >lens into the body, the infinity images lined up just right.
>
>    Sounds like my day. I have a IIIf BD on approval. With my 1937
> 50mm Elmar it doesn't *quite* focus to infinity. With all my
> other lenses it's dead on the money.
>
>    However, this Elmar, along with all my other lenses, does
> focus accurately at infinity on all my other screwmount bodies,
> and on my M3 with Leitz adaptors.
>
>    I found that on the IIIf BD I could fix the infinity focus by
> gently pressing upward on the lens barrel.
>
>    There's obviously enough play in the focusing helix that the
> lens can be canted very slightly. It's clear from playing with it
> that the play is not in the locking mechanism that keeps the
> collapsible lens extended.
>
>    What I don't understand is why the problem only exists with
> this one body, and not on any of the other four I tried.
>
> Howard Sanner
> flagstad@mindspring.com
>
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