Archived posting to the Leica Users Group, 1998/06/03

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Subject: Re: [Leica] Tri-Elmar focusing
From: Chris Bitmead <chrisb@ans.com.au>
Date: Wed, 03 Jun 1998 13:36:59 +0000
 
George Huczek wrote:
> 
> Does anyone know if this lens has to be refocused when focal lengths are
> changed?

The answer MUST be no, because of the nature of rangefinder
focusing. It is not related to focal length. Right?

> In some zooms, the lens stays in focus when the focal length
> changes.  You focus at the longest focal length, then zoom out to whatever
> focal length you want to use. The Tri-Elmar is not a zoom lens, so I'm
> wondering if focusing drifts when the lens is set to a new focal length.