From: Larry Colen
A few years ago, a friend took a green laser, shined it through a
cylindrical lens to spread the beam in one axis (like a laser level)
and passed that beam through smoke from his smoke machine. The
effects looked amazing, but were well beyond the ability of my FZ20 to
capture.
I just picked up a green laser for $25 off the net, and have been
having fun playing with it. Mine doesn't seem to have the power (it
was billed as "100mW" but it's probably closer to 20) to do a good job
of cross sections when I shine it through plexiglass rod. I've had
some luck doing a long (1-5 second) exposure and just passing the beam
through smoke, fog etc.
I just realized that there may be a better way of doing this, and that
would be to make some sort of mask for a flash so that it just shines
a thin "slice" of light.
Google GOBO.
Also sometimes called a flag.
Has anyone on the list tried this, or something like it? Any advice or
tricks that might help?
I also need a better way of making "smoke". Last night I was trying
with dry ice, but it didn't work as well as I'd hoped, though some of
my experiments with tonic water, black light (quinine fluoresces), dry
ice, and the green laser show some promise:
http://www.flickr.com/photos/ellarsee/sets/72157623226044832/
I don't know what to do about making smoke, except to look for one of
those home disco smoke machines.
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