Winsor Crosby wrote:
>
> On Monday, December 9, 2002, at 05:57 AM, John Hermanson wrote:
>
> > Most leaf shutters , though, top out at 1/350th at best (even when the
> > dial
> > says 1/500) Blades simply can't move that fast.
> > _________________________________
> > John Hermanson www.zuiko.com
> > Camtech, Olympus Sales & Service since 1977
> >
>
> In addition, most, because of their design, will darken corners at the
> higher speeds.
Modern shuter designs have mostly overcome that by their odd shapes,
that almost instantly open up full radius as they begin opening. There
are some marvelous shutter blade designs out there, undoubtedly
prompted by the characteristic you mention.
> Part of the genius of the focal plane shutter was it
> evenness of illumination.
For non-moving subjects...
The faster the subject moves, the more odd shaped it becomes. But,
it's evenly illuminated! <smile>
keith whaley
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