> 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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