>
> Omer Nezih Gerek wrote:
>
> > How does the OTF trigger faster than 1/60? Or does it? Only at 1/60 or
> > slower, the shutter is completely open, and if the sensor detects over
> > exposure (integral of the ligh, depending on ASA) immediately, it should
> > start closing the shutter. Is there a faster reaction system in OM's?
> > Does it, for example, trace the shutter horizontally, as well? The stripe
> > that traces the shutter plane during 1/1000 is quite narrow. Is it
> > possible for the sensor to react so instantly that the second curtain
> > starts following the first opening immediately to produce 1/1000th?
> >
> Easy, it measures the ligth before it opens the shutter. If the results
> indicate a shutter time faster then 1/60 the shutter opens at that speed
> and will not change. For slower speeds the camera makes a OTF exposure.
>
> Richard
>
Obviously the metering prior to shutter means something. However,
in the OFF position of OM2N, the camera does not make a prior
metering. If it solely depends on the OTF metering during exposure,
it should not give exposures faster than 1/60. The subject was
about the OFF position of OM2N, I guess. The responses indicated
that the OFF mode does not shoot slower than 1/30, I guess it does
not shoot faster than 1/60 either. This makes a very restricted
shutter range (1/30 and 1/60 only).
Omer Nezih GEREK
Electrical & Electronics Dept. email: gerek@xxxxxxxxxxxxxxxxx
Bilkent University, phone: 90-312-2664040 x 2480
06533 Bilkent, Ankara, fax : 90-312-2664307
TURKEY http://www.ee.bilkent.edu.tr/~gerek
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