Flashbulbs would work the same way.
See the chart at http://www.fys.uio.no/~tbryhn/main/F280chart.html
Think of it. The f280 is just like another light. Changing the shutter
speed doesn't selectively change the f280 illumination vs other
illumination unless the shutter speed is longer than the flash length,
which is about 1/25 second.
tOM
On Wednesday, May 01, 2002 at 22:24, Terry and Tracey
<olympus@xxxxxxxxxxxxxxx>
wrote re "Re: [OM] F280 ModPhoto" saying:
> Are you sure about this? Flashbulbs work (apparently) the way as described
> in the original email. And the F280 is just a low powered electronic bulb in
> this mode.
>
> Foxy
>
> ----- Original Message -----
> > "...In Super FP mode you can use any shutter speed above 1/60 sec.
> > and be assured of full flash coverage. (If you could use Super FP
> > flash at speeds slower than 1/60 sec. it would flash for only part of the
> > time the shutter was open, leading to possible under exposure. The camera
> > does not allow this and signals "under" if you attempt it)..."
> >
> > "...Only at closer distances and lower shutter speeds, 1/60 to 1/125
> > sec. do you get enough light to expose a subject by flash alone in
> > Super FP mode.
>
> Shutter speed doesn't matter, just flash to subject distance and ambient
> light.
>
> > "...Although illumination provided by the F280 flash is constant in
> > FP mode, the amount of fill can be controlled relative to ambient
> > light by selecting higher or lower shutter speeds.
>
> Wrong. The fill ratio is controlled only by flash to subject distance.
>
> > This is accomplished by changing the lens aperture in automatic
> > mode. If you set a lower shutter speed, the amount of fill-in
> > flash will be greater. Moving above 1/250 sec. will darken the
> > shadows(as well as freezing the action and minimizing depth of
> > field). Although background exposure will remain correct, there
> > is no automatic way to determine what would be the proper
> > fill-to-ambient-light ratio for each subject. Often this is a
> > matter of taste or personal preference. Although there are no
> > hard and fast rules for obtaining optimal balance, with a little
> > experimenting you should quickly get a feel for it."
>
> Wrong. The fill ratio is controlled only by flash to subject distance.
--
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tOM Trottier, ICQ:57647974 http://abacurial.com
758 Albert St, Ottawa ON Canada K1R 7V8
+1 613 860-6633 fax:231-6115 N45.412 W75.714
"The moment one gives close attention to anything,
even a blade of grass, it becomes a mysterious,
awesome, indescribably magnificent world in itself --
Henry Miller, 1891-1980
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