Archived posting to the Leica Users Group, 2008/06/13

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Subject: [Leica] M8 and the WAR
From: henningw at archiphoto.com (Henning Wulff)
Date: Fri Jun 13 15:54:23 2008
References: <DC4B73A4105FCE4FAE0CEF799BF84B36013F2140@case-email.casefoods.com> <4852E0A1.4070804@hemenway.com> <4852F264.5070803@san.rr.com>
 
>Jim und David,
>
>Let it be Known that the Rolleiflex Infra-Red filters have a "lens 
>correction"
>built into them to compensate for IR focus shift.
>
>BTW, I have a Leica E-39 size IR filter available, should anyone want it.
>
>Jerry
>




That's interesting.

I assume it's a slight diopter ground into the filter, to compensate 
for some specific IR wavelength (which any specific film may or may 
not be sensitive to).


-- 
    *            Henning J. Wulff
   /|\      Wulff Photography & Design
  /###\   mailto:henningw@archiphoto.com
  |[ ]|     http://www.archiphoto.com
Replies: Reply from mark at rabinergroup.com (Mark Rabiner) ([Leica] M8 and the WAR)
 In reply to: Message from drodgers at casefarms.com (David Rodgers) ([Leica] M8 and the WAR)
Message from Jim at hemenway.com (Jim Hemenway) ([Leica] M8 and the WAR)
Message from glehrer at san.rr.com (Jerry Lehrer) ([Leica] M8 and the WAR)