>This is at best only partly true since the meter needs to know the maximum
>aperture of the lens and what the lens will be stopped down to at exposure
>time. A modern (!) manual camera like the OM1 does the metering at max
>aperture not stopped down. Thus the teleconverter passes through a
corrected
>maximum aperture by offsetting the pin indicating the maximum aperture by
the
>right amount through to the OM body.
Not really true. If you look at a 2X-A, the aperture pin is not offset. The
aperture pin is not absolute aperture, but relative. How far it is from
fully open, not how far it is from f1.0
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