The pressure plate rides on the outside rails, the film rides in the space
between the inside rails and the pressure plate. Distance from inside rails
to pressure plate is 0.19mm. Film thickness varies from 0.14 to 0.16mm so
it is thinner than the channel between pressure plate and rails.
John
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----- Original Message -----
From: Marco <tom@xxxxxxxxxxxx>
To: <olympus@xxxxxxxxxxxxxxx>
Sent: Thursday, June 10, 1999 4:50 AM
Subject: R: [OM] 28mm Zuiko won't focus at infinity
> I believe the inner rails are a bit too near the lens than the actual film
> surface. The film rests on the pressure plate, and the pressure plate
rests
> on the outer rails. I found exactier putting the screen on an inner rail
and
> on an outer one. Doing this the centre (center) of the screen should be
> nerarer the actual film surface.
>
> Marco
>
> ----------
> >Da: WKato@xxxxxxx
> >A: olympus@xxxxxxxxxxxxxxx
> >Oggetto: Re: [OM] 28mm Zuiko won't focus at infinity
> >Data: Sab, 5 giu 1999 19:10
> >
>
> > CH Ling had another method of checking focus that I
> > haven't tried and that was to use a ground glass focusing screen gently
> > attached (perhaps somewhat diagonally--I've never done this) to the
inner
> > film rails. Then you could compare the viewfinder focus with the focus
at the
> > film plane.
>
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>
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