Mirror angle is probably out.
_________________________________
John Hermanson www.zuiko.com
Camtech, Olympus Sales & Service since 1977
21 South Lane, Huntington NY 11743-4714
631-424-2121 For Free Olympus manuals,
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----- Original Message -----
From: "Jim Brokaw" <jbrokaw@xxxxxxxxxxx>
To: <olympus@xxxxxxxxxxxxxxx>
Sent: Monday, September 02, 2002 3:30 PM
Subject: Re: [OM] Viewfinder problem
> on 9/2/02 9:53 AM, mms@xxxxxxxxxxxxxxxxx at mms@xxxxxxxxxxxxxxxxx wrote:
>
> > Zuiks,
> >
> > Using a recently bought OM-2, I noticed that my 50mm lens would focus
beyond
> > infinity. Must be the lens, I thought, but it works fine on my other
OM's.
> > Do I have a mirror offset of some kind? Loose prism? I can't see any
way to
> > adjust the mirror stop.
> >
> > I was focussing on some Mtn. peaks about 20 mi. distant, which is about
as
> > close to infinity as it gets around here.
> >
> > Any ideas?
> >
> > Morgan
> >
>
>
> Maybe the previous owner was Buzz Lightyear?
>
> The problem could be in two different areas... it could be a problem in
the
> viewfinder/mirror assembly, or it could be a problem in the lens mount
> location...
>
> Did you check the focus with a ground-glass screen at the film plane?
Camera
> on tripod, shutter to B, ground-glass (an OM finder screen will work) laid
> across the film rails (tape it in place, make sure its flat and square on
> the innermost rails i.e. closest to the opening for the image). Focus lens
> on something at infinity, check image on the ground-glass using a loupe,
> then let the shutter close and check the image in the viewfinder.
>
> If the lens focuses OK at the film plane, but not in the viewfinder, then
> the problem is in the mirror/finder area. Could be mirror alignment, or
> finder screen location or alignment, or I'm sure other things.
>
> If the lens focuses beyond infinity at the film plane (on the
ground-glass)
> as well as in the viewfinder, then the problem is in the lens flange to
> film-plane (and finder screen) distance. This could be due to missing
shims
> or washers under the lens mount, or damage from a drop, or other things I
> suppose...
>
> This probably could be taken care of in a CLA...
> --
>
> Jim Brokaw
> OM-1's, -2's, -4's, (no -3's yet) and no OM-oney...
>
>
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