On what speeds does the F280 change it's duration and why?
It seems to me the curtain slot always takes 1/60 at 1/60 and faster
speeds, and at slower speeds, the flash could be done in 1/60 without any
problem.
tOM
On Tuesday, April 23, 2002 at 9:21, C.H.Ling <olympus@xxxxxxxxxxxxxxx>
wrote re "Re: [OM] even more about the F280" saying:
> Winsor Crosby wrote:
> > >
> > >The F280 is intelligent in Super FP mode, the flash duration varies,
> > >you can even get higher GN with OM707.
> > >
> > >C.H.Ling
> >
> > Are you jumping to a conclusion? The engineers who designed the F280
> > could just as easily have decided to just cut off flash duration at
> > higher shutter speeds to save charge. Variation in flash duration
> > does not necessarily mean that there is a smart flash system.
> >
> Yes, you are right, may be I have wrongly used the word "intelligent".
> I just want to say it is not fixed, as least the flash duration will
> change according to different shutter speed, it is not a stupid flash
> :-)
>
> > On the other hand, maybe I am wrong. It would seem logical to me that
> > since the F280 acts like a constant light source added to the picture
> > that its light would be added into the automatic shutter calculation.
> > That would certainly increase the number of successful F280
> > exposures. Otherwise they would somehow have to use the extra contact
> > on the flash to cause the automatic setting of the shutter to ignore
> > light from the flash and how would they do that? Easier just to let
> > the camera operate normally integrating all the light in the scene
> > into the final shutter calculation.
> >
>
> Yes, but the balance between ambient and object illumination is hard
> to determine. I have once made a day shot into evening shot by using a
> 24/2 getting very close to the object.
--------------- http://groups.yahoo.com/group/Olympus-Documentation
tOM Trottier, ICQ:57647974 http://abacurial.com
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Henry Miller, 1891-1980
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