You are also partially correct, the T32 is from 1/1000s to 1/50,000s
(max power to min power), while the old Metz T45 at max power output
was only 1/300s.
C.H.Ling
clintonr@xxxxxxxxxxxxxxxx wrote:
>
> You're partially correct - a CdS cell cannot react to light from a
> strobe. Even changing the intensity of light two or three "stops" will
> take several seconds to reach full impact on a CdS cell - and the
> typical maximum duration of a strobe is in the neighborhood of
> 1/10,000th second, often faster.
>
> One correction on the XA's function, however - they actually use two CdS
> cells, one of which controls only the meter needle in the finder, the
> other being connected to the circuit that controlls the exposure. There
> is no "memory" function - in other words, the exposure isn't "set" when
> the release button is pressed, it is judged in real time. The exposure
> control circuit keeps the shutter's electro-magnet energized (keeping
> the shutter blades opening/open) until it registers that enough light
> has struck the CdS cell to provide a proper exposure - then it
> de-energizes the electro-magnet, allowing the blades to begin closing.
> The exposure during this closing time is included in the exposure
> calculation.
>
< This message was delivered via the Olympus Mailing List >
< For questions, mailto:owner-olympus@xxxxxxxxxxxxxxx >
< Web Page: http://Zuiko.sls.bc.ca/swright/olympuslist.html >
|