Thanks Foxy, that pretty much answers my query. By the way , is the G40
pretty much the same as the F280 in operation ?
>
> From my achives
>
> Foxy
>
> ----- Original Message -----
> From: "Giles" <cnocbui@xxxxxxxxxxxxx>
> To: <olympus@xxxxxxxxxxxxxxx>
> Sent: Monday, February 01, 1999 5:53 PM
> Subject: [OM] F280 contacts
>
>
>
> The Ti has an FX contact in lieu of an X contact to operate the
> F280. This
> contact is synchronised with the switching off of the trigger
> switch - when
> the
> first shutter blind starts travelling.
>
> The Ti treats the output of the F280 as normal light and so varies the
> shutter speed
> during the exposure, rather than vary the output from the flash.
>
> The clock terminal of the shoe conducts current normaly -low -
> (-3v). When
> the
> trigger switch opens the clock terminal becomes high impedance triggering
> output
> from the f280.
>
> The D.B terminal is used to stop output from the f280. It is normaly low
> (-3v) and
> becomes high impedance in order to halt output.
>
> There are five contacts in the Ti hot shoe. Looking at them from the back
> of the
> camera they are roughly in an H arrangement with one contact at the end of
> each arm
> and one on the crossbar. Top left is TTL, top right is L the
> middle contact
> is X,
> the bottom left is D.B and the bottom right is CLK.
>
> Giles
>
> Terry and Tracey wrote:
>
> > would have to use to understand them would be significant. So,
> does anyone
> > have info on how the F280 detects high speed sync, and what signals need
> to
> > be sent to it? I think it gets one pin to go to high speed mode and the
> > other pin to turn it on. Does it supply it's own voltage
> (camera provides
> a
> > short circuit), or does the camera supply the voltage? I should
> be able to
> > make something with opto isolators to make it work with my OM-1n.
> >
>
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>
>
>
>
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