You got it! UNDER exposure means need is high in the finder, OVER means needle
is low.
John
Terry and Tracey wrote:
> Interesting. Can someone jump in when I'm wrong. I understand that the CdS
> cell had a positive coefficient - the lighter it is, the more current flows
> though it. If the battery voltage is higher, for the same ambient light, the
> current will be higher, and the meter will read overexposure. When the
> camera is adjusted to centre, this means the actual exposure on the film is
> under exposed.
>
> Is this what is happening? Have I got it right?
>
> Foxy
>
> >If a mercury battery of 1.35v give correct exposure in OM-1, and a wein
> >(zinc-air) cell of 1.4v is 1/2 stop under. Can I extrapolate that a
> >silver oxide battery of 1.5v will be 1 stop under or more (aside from
> >the possibility that 1.5v might ruin OM-1's circuitry)?
> >
> >*****************************
> >John Hermanson wrote:
> >>
> >> For those interested, I've found there is a meter error of 1/2 stop
> >> (underexposure) in a Weincell equipped camera, compared to a mercury /
> MR9
> >> equipped OM-1.
> >>
> >> John
> >> Camtech
> >
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