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RE: [OM] FW: OM 2SP Metering when using widest aperture

Subject: RE: [OM] FW: OM 2SP Metering when using widest aperture
From: Mark Dickinson <Mark.Dickinson@xxxxxxxxxxxxxxxxxxxxxxxx>
Date: Tue, 13 Oct 1998 16:55:08 +0100
I'm sure you are right - it's just easier to tell with the 2SP. But why
is it not a full stop? (I know I'm probably missing some fundamental of
photography here)

> -----Original Message-----
> From: John Hermanson [SMTP:omtech@xxxxxxxxx]
> Sent: Tuesday, October 13, 1998 3:24 PM
> To:   olympus@xxxxxxxxxxxxxxx
> Subject:      Re: [OM] FW: OM 2SP Metering when using widest aperture
> 
> You will also probably notice this on ANY OM body while turning a lens
> one
> stop  to its widest aperture.  It will not indicate a full stop of
> difference.
> 
> John
> 
> Mark Dickinson wrote:
> 
> > > The OM2S(P)'s meter display is divided into one third stop
> increments.
> > > Why is it that when I change from the second widest aperture on a
> lens
> > > to the widest, the meter only alters by two thirds of a stop for
> what
> > > should be a full stop change (e.g. f4 to f2.8 on a 28mm f2.8
> lens)?
> > > This is a particular puzzle on my 50mm f1.8 as the difference
> between
> > > f2.8 and f1.8 should be more than a whole stop and the meter still
> > > only changes by two thirds of a stop. As far as I can tell when
> > > altering the aperture, the physical distance that the aperture
> ring is
> > > turned to go to the widest aperture IS slightly less than that
> between
> > > other stops. Why?
> > >
> > >
> >
> >
> 
> 
> 
> 
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