>Perhaps some of the more technically knowledgeable folks could correct
>me if this is wrong, but the only way I can see that full synchro
flash
>could work with a focal plane shutter is by making the flash duration
>very much longer than is usual for an electronic flash - about 1/30s
in
>fact, since *both* shutter curtains must move across whilst the flash
is
>producing light (and that's how long it takes for 1/60s exposure).
>Since the traditional xenon flash lasts for about 1/10,000s, I think
>Dirk has a bit of cheek calling Nikon's approach brute force ;)
>
what I meant was that Nikon put a superfast, vertical travelling
titanium shutter in their cameras at least because the shutter speed
where the whole film would be uncovered at one instant would be much
higher than with olympus' horizontally travelling slower cloth shutter.
In other words, the second curtain (or blades) is so fast that they can
leave the entire film area open at 1/250 of a second. That to me is
brute force, putting a very fast shutter in there.
Olympus chose to make the flash duration much longer with the F280
unit, so that the shutter curtain speed was not important. I believe
they do this by pulsing the flash in a strobe manner. I was complaining
that oly has not extended this technology to other kinds of flash
units. As result of this, the F280 technology has remained a curiosity
and not a mainstream, all dominating, world conquering technology that
it deserves to be (I embelish a bit...).
>> It would also be great to see Super FP in an olympus point 'n shoot.
>
>I've a nasty feeling you'd drain a point & shoot's batteries v.
quickly.
>For that application, I think it would be better to just use a leaf
>shutter and more traditional flash technology.
>
The IS3 and IS30 have it. See the oly america web site.
Be seeing you.
Dirk Wright
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