Angel,
If the row of bars is halfway between 1/125s and 1/250s, can the camera
work
on 1/180s or 1/215s, for instance ?
Yes. There have been previous discussions of this on the list. You
are right. I could not find where Olympus mentioned it in the small
collection of printed stuff I have.
When I have buy my first OM 4 (1987) I have check this matter and the
slides
are always sub or over exposed. I work always on Manual mode, so on that
time I have forget this matter. Some days ago I have tested my OM 4 camera
one more time shooting on Auto mode with the bars halfway between 125 and
250 and shooting the same picture on Manual mode with ex. exposure. The
slide on Manual mode has perfect exposure and the slide on Auto mode is 1/2
stop sub exposed.
There is probably something else going on. The manual setting is
based on the electronic calculation of the light transmitted through
the first mirror and reflected by the second mirror onto the meter
cell on the floor of the mirror compartment. The automatic
calculation is based mostly on the reflection of light from the
pattern printed on the1st shutter curtain and from the film base onto
the same meter cell depending on the shutter speed. Olympus in the
owner's handbook says the automatic "off the film" metering system
works expecially well_if the frame is evenly illuminated_.
I suspect the difference is not due to any malfunction but in the
difference between your careful manual metering that is tailored to
your subject, and the inflexibility of the automatic system,
especially since you say that the exposure difference may go in
either direction. If it was consistently over or under exposed in
automatic and more than a 1/2 stop, then there might be a malfunction
that needs repair.
My thoughts, but no expert.
Winsor
--
Winsor Crosby
Long Beach, California
?
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