Re: [photo-3d] Re: lightning trigger

[Bill Costa <Bill.Costa@xxxxxxxxxxxxxx>]

   Ron Beck <rbeck@xxxxxxxx> posted in part:

> The more I think about it, the more I tend to think that it was a sound
> activated device (wouldn't work for lightning) which was used for high
> speed photography of things like gunshots or balloon pops.

    Such triggers are commonly used, but to trip an electronic flash,
    not the shutter.  The technique, of course, is to use a totally
    dark room and leave the lens open.  For more info, see:

           http://www.hiviz.com/tools/basics/hspbas_1.html

    which discusses all manner of flash triggers including
    sound triggers.


                                                       Later....BC

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