Archived posting to the Leica Users Group, 2005/01/08

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Subject: [Leica] ZI & focus shift
From: lowiemanuel at yahoo.ca (Emanuel Lowi)
Date: Sat Jan 8 13:00:42 2005
 
Bill Marshall wrote:
> 
> > Zeiss did talk about focus shift in its lead up to
> Photokina & it
> > is again mentioned on it Zeiss Ikon website.
> Specifically, it says that its
> > lenses are designed to "minimize focus shift."
> 

AFAIK, there is some kind of focus shift caused simply
by altering diaphragm size/f-stops. I have imagined
that ZI was going to address this somehow through the
placement and design of their lens diaphragms.

Emanuel

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