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Re: [OM] Shims for focusing screens in OM?

Subject: Re: [OM] Shims for focusing screens in OM?
From: John Hermanson <omtech1@xxxxxxxxxxx>
Date: Thu, 06 Aug 2009 08:42:22 -0400
In an OM body I can check mirror angle, finder focus, infinity focus. 
Messing with the factory shimming of the screen is to be avoided. Prism 
has to come out to change them, they are glued in, it can be an all day 
job.  I haven't done one in decades.
___________________________________
John Hermanson  |   CPS, Inc.
21 South Ln., Huntington NY 11743
631-424-2121  |  www.zuiko.com
Olympus OM Service since 1977
Gallery: www.zuiko.com/album/index.html


usher99@xxxxxxx wrote:
> Very clear that many Canyon offerings may front or back focus through 
> the VF using MF .  I believe that the  OM 5DII has a small shim for the
> screen and replacemnts both thicker and thinner are available.  The 
> range of "in spec" for servicing is disturbingly wide, unless
> a nice technician is encountered.  Have not seen this issue mentioned 
> much with OM.  Perhaps a MF system is manufactured to
> tighter tolerances?  It would be more of a pain to check of course.  
> Wonder if John can check this somehow.  I know from
> many very narrow dof shots in macro at 1:1 or greater that at least 2 
> bodies I have are spot on or very close.
> 
> A not really looking for trouble,
> Mike
> 
> 
> Oh, then this issue also needs to be considered of course for digital 
> film for zuikos.  Posted this before:
> 
> http://www.jayandwanda.com/photography/dslr_man_focus/man_focus.html
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