Archived posting to the Leica Users Group, 2009/04/24

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Subject: [Leica] 21 mm Elmarit fringing
From: wildlightphoto at earthlink.net (Doug Herr)
Date: Fri, 24 Apr 2009 18:34:08 -0700 (GMT-07:00)
 
Geoff Hopkinson wrote:

>After responding I realised that Douglas may possibly be referring to
>fringing from (lateral?) chromatic aberration too, since he has mentioned
>aspherical correction.

Optical chromatic aberrations are extremely rare among wide-angle lenses.  
I'd guess that the problem noted is related to the IR filtration and cyan 
corners.

Doug Herr
Birdman of Sacramento
http://www.wildlightphoto.com