I have a book on OM1&2 cameras that shows some pictures where a OM2 (non-n)
is used on TTL and a non-connected flash (I think it was a 310 but that
doesn't matter, it wasn't connected) was fired a couple of times from
different locations. The TTL system was able to calculate these short pulses
AND the daylight into a proper exposure. I would expect other TTL bodies to
behave the same.
I suppose both the flash connectors (the shoe and the cable socket) trigger
at the selected speed (FP or normal TTL). If , when using FP sync, only the
shoe gives a FP trigger and the cable socket gives a normal TTL trigger,
then it would be possible to do this setup.
Daan
Pictures of Insects at:
http://www.kalmeijer.net
> Hans van Veluwen wrote:
> >
> > : If I set the power output of the Vivitar will the flash output of the
F280,
> > : whether in super FP mode or in normal OTF mode, take care of itself
by
> > : reference to the output of the Vivitar and the strength of the
surrounding
> > : ambient light?
> >
> > You can't use Super FP Mode because the Vivitar won't be synchronized.
OTF flash
> > by itself can take daylight into account, but not the sudden burst of an
> > auxiliary non-dedicated flash when its output might cause overexposure.
The only
> > reliable method to do is set both flashes to manual mode and do GN
calculations
> > or use a flash exposure meter. Too bad the F280 doesn't have Normal Auto
> > computer flash; that would have been an option too.
>
> Hans ............. is this to imply that the F280 takes daylight into
> account as a continuing source of light and opposed to it [the F280]
> reacting to the intensity of the daylight at the instant it [the F280]
> fires? If the former I can understand that the sudden impulse of light
> from the Vivitar might cause a problem but if the latter surely isn't
> the impulse of light from the Vivitar's flash just another source of
> directional light the F280 has to account for when "doing its thing"?
>
> I will some experimentation and report back shortly.
>
> jh
>
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