Archived posting to the Leica Users Group, 1999/10/06

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Subject: RE: [Leica] Shooting Leica wide open
From: Paul Chefurka <Paul_Chefurka@pmc-sierra.com>
Date: Wed, 6 Oct 1999 09:56:26 -0700 
Peter,

Eric didn't say they performed better wide open.  He said they didn't
improve significantly when stopped down.  This is presumably due to the fact
that the entire lens is very well corrected for all aberrations.  Examples
of this in the M range are the 90 APO ASPH and the 135 APO Telyt.  The 100
APO Macro-R and the 180 APO Elmarit-R also qualify in this regard.

Paul Chefurka

> From: Kotsinadelis, Peter (Peter) [mailto:peterk@lucent.com]

> Eric,
> 
> With all due respect, no lens performs better wide open than 
> stopped down.