Archived posting to the Leica Users Group, 1997/02/24

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Subject: Re: Making pictures with the M Leica
From: (Ben Holmes)
Date: Mon, 24 Feb 1997 23:18:02 -0700 (MST)

>When focusing a rangefinder camera, you
>should start either at infinity or the closest setting, and move the ring in
>one motion until the two images coincide--do not rack it back and forth, as
>you might with an SLR, to improve the focus.  The reason this works, I
>understand, is due to the nature of the mechanical linkage between lens and
>rangefinder--racking it back and fortyh produces inaccuracies.

This is an old machinists trick. As the bed screw of a mill or lathe wears
it develops slop. When moving the bed to make a cut you back up so that the
screw is engaged fully when your tool touches the work. Same with the


Ben W. Holmes

Boulder, CO