To follow up on John's observation, leaf shutters open from the middle and
close the edges first... so at smaller than wide-open apertures the film
will get 'full light exposure' longer than at wide-open apertures. So not
only are the blades slower than marked, but the effective exposures vary (in
a small way) due to the aperture/shutter effective opening changes.
Note that Olympus solved all this with the Pen F series, which have the
full-range X-sync of a leaf shutter with the true 1/500 of a focal-plane
shutter (as well as cheaper and less complicated, less design-restricted
lenses).
--
Jim Brokaw
OM-1's, -2's, -4's, (no -3's yet) and no OM-oney...
on 12/9/02 5:57 AM, John Hermanson at omtech@xxxxxxxxx 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
> 21 South Lane, Huntington NY 11743-4714
> 631-424-2121 For Free Olympus manuals,
> please call 1-800-221-3000
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