I also think the "spot-on" exposure with negative film might not be with slide
film.
John
C.H.Ling wrote:
> ----------
> > From: John Hermanson <omtech@xxxxxxxxx>
> > To: olympus@xxxxxxxxxxxxxxx
> > Subject: Re: [OM] OM4Ti meter
> > Date: Wednesday, July 01, 1998 9:22 PM
> >
> > Auto otf has never been truly linear (in any camera) , that is at
> different
> > light values the actual otf will be +- a certain amount. Compare it to
> the
> > equivalent exposure in manual and the difference can be 1/2 stop. Throw
> in
> > film reflectance and results can be unpredictable.
> >
> > John
> > Camtech
> >
> >
> If it is a film reflectance problem, then most of today's films are having
> a reflective index lower than the old days when OM started the OTF design.
> I cannot find any film that give me same values in auto and manual mode (at
> least 2/3 stops different). But when the shutter speed is above 1/60, where
> auto exposure read the shutter curtain's reflection instead of film, the
> values of both auto and manual are exactly the same.
>
> I shot 950f negative so I didn't found out this problem before. But I
> always under estimate the speed and got un-sharp shot when I expect I can
> hand hold the camera at 1/8s (the 4Ti's meter told me) but eventually it
> exposed at 1/4s.
>
> I saw some people said they also observed this but "the exposures have
> always been spot-on". I think they can try to shot in both auto and manual
> mode for the same scene then they will know what happen. If they got the
> same result then this problem may be happen on some production batch of
> OM4Ti only and I am the unlucky one.
>
> C.H.Ling
>
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