Archived posting to the Leica Users Group, 2000/07/12

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Subject: Re: [Leica] Stupid question!!!
From: Gaifana@aol.com
Date: Wed, 12 Jul 2000 20:42:23 EDT

>>>In a message dated 7/12/00 7:10:59 PM, howard.390@osu.edu writes:

>>>In short, RF misalignment is when either the two images do not converge at
all (usually in the vertical), or when they converge at an incorrect setting
(usually horizontal).  In other words: vertical misalignment manifests
itself as the two coincident images being slightly offset vertically.  This
may be annoying, but it doesn't affect focus accuracy (other than if it
becomes too distracting to see properly).  

That's not always true.  When you have diagonal lines in your composition, 
vertical misalignment can screw you up.  Likewise, when you are close-up, 
focusing on a flat object that is not parallel to the film plane, vertical RF 
error can cause focusing problems, especially if you are focusing from 
letters printed on something.  And it definitely wrecks split-image focus on 
an M.

Dante