Archived posting to the Leica Users Group, 1998/08/07

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Subject: Re: [Leica] prescription eyepiece
From: "Roy Zartarian" <royzart@connix.com>
Date: Fri, 7 Aug 1998 20:55:38 +0000

What you do, at least for an M, is go after the Leica part
042-253.008 which is a rotating mount for an eyepiece correction
lens for astigmatism. Alas, locating someone to grind a lens to
fit is not that easy.

Roy

On  1 Aug 98 at 8:02, Stanley E Yoder wrote:

> >From: Fstop008@aol.com
> >Date: Thu, 30 Jul 1998 20:10:29 EDT
> >Subject: Re:  Re: [Leica] Sherry Krauter
> 
> >On the subject of Leica repairs: who do you contact in order to have a
> >prescription viewfinder inserted into the eyepiece, if you want an astimatic
> >error included, which is not included in Leica's commerically available
> >eyepieces?
> 
> Maybe I'm missing something re optical knowledge, but how can you
> correct for astigmatism when the camera is likely to be in two
> positions 90 degrees apart, relative to the eye (horiz/vert, or
> landscape/portrait)? Only if the eyepiece can be rotated to keep the
> correction in the proper plane, yes?
> 
> Stan Yoder
> Pittsburgh 
>