Hi cOMmunity,
> maarten derksen wrote:
> Thanks everyone. One wonders why olympus didn't advertise the fact in
> bold letters in the manual, because it's such a great feature. Or is it
> obvious that AE implies continuous shutter speeds?
> Maarten Derksen
MOST cameras providing automatic control of the
shutter speed provide continious/stepless operation.
That is true for Olympus as it is for M*nolta,
C*non, N*kon and ... you name them.
The principle behind this is that they just
release the first curtain, and measure the light
coming in (if TTL operated) or compare with a
prerecorded value (if not TTL), and when the
values match, they release the second curtain.
It is that easy.
That feature made the OM-2 (not the OM-2N!)
somehow interesting. The OM-2 did that process
of collecting-light-until-it-is-enough very
thouroughly and if neccessary for minutes and
even hours. Fascinating, but not too pratical
either, since any long expures has to fiddle
with the Schwarzschild effect (films getting
less and differently sensible with longer
exposure times and merely little amount of
light trickling in). And this Schwarzschild
effect was not compensated by the long time
exposure control of the OM-2. And it hardly
could have done so, this this effect varies
with films, their speed and other factors.
Since the collecting process costs battery power,
since the second curtain is hold back by a magnet,
this feature was abondoned with the OM-2N and
all later bodies, limiting the waiting to release
curtain no.2 to 120 seconds or similar settings.
Greetingd
Andreas
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