Archived posting to the Leica Users Group, 1998/02/18

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Subject: [Leica] Star Diffraction Pattern?
From: Robert Rose <RJR@usip.com>
Date: Wed, 18 Feb 1998 10:24:14 -0800
 
Duncan wrote:

<<Its diffraction around the edges of the diaphram.  Most lenses do this once stopped down>>

Yes, I understand that.  (The B.S. in physics at least taught me that much.)  But with Leica lenses this happens WIDE OPEN.

Is this a characteristic of "diffraction limited" lenses?  I know that on a telescope the sharpness of the Airy disk is an indication of the optical quality.

Bob