Archived posting to the Leica Users Group, 2001/02/07

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Subject: RE: [Leica] how can the 75 Lux focus go bad?
From: "Dan Honemann" <ddh@home.com>
Date: Wed, 7 Feb 2001 11:24:39 -0500
 
Oops--forgot to mention that aperture should be set wide open for all tests,
and shutter speed set for proper exposure.

Dan

> Tape some newsprint to a notebook or binder and tape a ruler on
> top of that.  Then open the notebook to an angle of at least 30
> degrees (enough that you will be able to focus on the 6" mark of
> the ruler, but not so much that it is virtually parallel to the
> film plane, as you want the front and far ends of the ruler to
> have some measureable distance from each other).

[...]
Replies: Reply from "kididdoc" <kididdoc@home.com> (Re: [Leica] how can the 75 Lux focus go bad?)