Re: 3D Caves

[P3D Gregory J. Wageman <gjw@xxxxxxxxxx>]

John Roberts writes:

>Are there any really powerful flash units that can conveniently be triggered
>by an external electrical signal? I'd like to get one someday, but one thing
>I'd like to use it for is to freeze very rapid motion, i.e. to recreate some
>of the works of Harold Edgerton, but in stereo. It would be convenient to be
>able to generate an external signal and run it through a variable time delay
>to trigger the flash.

Actually, they all are!  The flash contacts in the camera just complete
a circuit to fire the strobe... you could do this with a transistor.

You could also use a free-running "party strobe" type of light.  Just
open the shutter on "bulb" or "time" and use a card in front of the
lens to control the number of "pops" you record...

        -Greg W.


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