Leaf shutter on DSLR, why?

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This evening I did a presentation/demo on what is often called rear-sync flash,
or 2nd curtain sync or, as I prefer calling it, tailflash sync. The live demo
was done using a standard DSLR that did not have such a capability. So I added
a Copal leaf shutter to the front of a DSLR lens and using a "simple" electronic
inverter switch between the shutter and the flash fired the flash as the Copal
leaf shutter started to close instead of as it first fully opens ... X sync.

I was able to demonstrate the effect of putting the blur (due to longish shutter
exposure time recording tungsten illumination) on the side of the moving
subject from whence (!) it was coming from while the flash provided the action
stopping burst to record a blur-free image of the moving (walking) subject.

The DSLR's exposure time was set to 2 seconds and within that time the Copal
shutter operated for 1/4 second. To see the camera with attached Copal shutter
follow this link: http://people.rit.edu/andpph/a-pix/leaf-shutter-dslr-7891A.jpg

Now I am trying to think of other applications for a DSLR avec leaf shutter up
front. Suggestions?  ;)

andy


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