Am I missing something VERY fundamental here? I thought 1.8 to 3.5
would be TWO stops, not one. I thought the progression in one stop
increments went:
1 - 1.4 - 2 - 2.8 - 4 - 5.6 etc.
i.e. each doubling of the number was TWO stops, and so 1.8 to 2.8 (there
being no 2.0 on a 1.8 lens) would be a bit more than 2 to 2.8 and so
would be about a stop and a third.
HELP!
> -----Original Message-----
> From: SiteMistic@xxxxxxx [SMTP:SiteMistic@xxxxxxx]
> Sent: Tuesday, October 13, 1998 3:33 PM
> To: olympus@xxxxxxxxxxxxxxx
> Subject: Re: [OM] FW: OM 2SP Metering when using widest aperture
>
> << 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 >>
>
> Actually, one stop from f1.8 would be f3.5. From 1.8 to 2.8 IS two
> thirds
> of a stop.
>
> Jim
>
>
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