Thanks Chris, Winsor, Tim,
This is a confusing flash.? The mode switch is misleading with one?labelled
?"TTL auto"?as the output in FP mode is fixed and the fill should add little to
the overall exposure.? I do understand how the high freq flashes at as a flash
bulb equivalent and how the GN decreases with increasing shutter speed.?? The
GN's are?also different on an OM 707--huh???
Little advantage of? TTL? mode if it is fixed---ran across this chart:
http://www.fys.uio.no/~tbryhn/projects/F280chart.html
May as well be totally manual.
At least the light lost from extension?will attenuate the ambient and flash the
same amount.
Hmm, back to the drawing board.
Mike
P.S. first 2 notes seemed to bounce, perhaps 3rd time is charm.
Date:
Mon, 28 Jan 2008 08:35:17 -0800
Correct. It is almost exactly like a tiny M type flash bulb. It is so
weak I doubt you would ever have to dim it.
Winsor
Long Beach, California, USA
On / January 28, 2008 CE, at 12:39 AM, Chris Crawford wrote:
> I think the F280's output is always the same in FP mode, it can't be
> dimmed.
> The exposure is controlled by aperture and shutter speed both, which
> also
> affects ambient exposure. This is unlike normal flash where background
> exposure is controlled by the combination of aperture and shutter,
> but only
> the aperture affects the flash exposure. So I think your only means of
> changing the F280's output is by controlling flash-to-subject
> distance, or
> by putting neutral-density filters over the flash to dim it if its too
> bright
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