Actually, the leaf shutter is "fully open" only a very small portion of
the time. What it is , and what's most important, is that it is open to
the full frame equally during the whole sequence from 1% to 100% to 0%.
The difficulty with focal plane shutters is that the actual exposure
opening to the film "walks" across (or up or down) the film. In the
case of most of our Olympus cameras the frame is only fully open at
shutter speeds of 1/60 and slower. AFAIK
<><><><><><><><><><><><
>Terry and Tracey wrote:
>
> >><<Their last leaf-shutter SLR body -- the Topcon Unirex, had a fully
> manual
> >>shutter (B, 1 through 1/500 sec), a hot shoe, TTL averaging as well as
> spot
> >>metering, shutter priority AE, and more. Lenses were very good and very
> >>cheap. Flash synchronization was available at all shutter speeds. >>
>
> I've got a question about leaf shutters. I understand that the opening time
> is fast enough to always have the the shutter fully open, so flash sync is
> not a problem.
>
> My question is "how does the shutter open". If it folows the same path on
> opening as closing, the centre of the shot will receive more exposure than
> the edges. I have never seen a picture of one slow motion to see it's
> operation.
>
> Foxy
>
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