>
> Dan,
> Here's what I think your camera and flash will do. I have the OM2n, but
> not the T20 (I have a dedicated Sunpak), and some of these combinations I
> haven't tried.
>
> >
> > 1) With the mode set to "OFF" what do I get when I fire the
> > shutter?
> > (My guess is that it picks the speed based on the OTF
> > metering, the same as "AUTO" mode.)
>
> Yes, you get the same as auto, but only to a point. If the exposure needs
> more than 1/30th of a second, your picture will be underexposed by that
> much. Which means that the switch must be set to auto to do 1 and 2
> minute night shots.
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?
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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