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

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Subject: [Leica] 21 Elmarit fringing
From: cummer at netvigator.com (H&ECummer)
Date: Sat, 25 Apr 2009 08:53:29 +0800
References: <mailman.17.1240618048.1139.lug@leica-users.org>
 
Doug,
I have the same lens, coded by Leica and with an IR cut filter. It  
does not show what you describe.
Are you using an IR cut filter? For personal experience coding and  
filtering will solve the problem.
Cheers
Howard


> Date: Fri, 24 Apr 2009 18:37:32 -0400
> From: Douglas Nygren <dnygr at cshore.com>
> Subject: [Leica] 21 mm Elmarit fringing
> To: lug at leica-users.org
>
> I have been using a pre-Asph 21mm Elmarit on the M8 and notice on the
> edges a subtle shift to light blue.
>
> My assumption is that this may be caused by vignetting, but I may be
> wrong. Has anyone else noticed it.
>
> A friend suggested that having the lens coded for the M8 might cure
> this problem. Does anyone know whether that is true or not?
>
> My friend maintains that coding helps wide-angle lenses. True?
>
> I assume the Asph 21 does not have this problem, but that's an
> assumption.
>
> Your help is appreciated, as always.
>
> Doug