P3D high shutter speeds

[Tom Deering <tmd@xxxxxxxxxxx>]

>I guess you can use
>the highest speed your camera does (1/2000s and higher), so you could
>really freeze smoke/fire, waterfalls and something like that

The problem with really fast shutter speeds is that you need *LOTS* of
light.  Most stereographers use low speed film because of grain, and small
apertures for maximum depth of field.  Those two together are bad enough,
but if you attempt really fast shutter speeds, standing on the surface of
the sun might not be enough light.

Instead of using a really fast shutter speed, you can use the short
duration of electronic flash to freeze motion.  Still, getting enough light
is a problem with very small apertures.  It might work in a professional
studio.  Extreme closeup photography is another possibility, since you need
far less light when you are close.  You run into problems with depth of
field in closeup photography, so this isn't as easy as it sounds, either.

>Also has anybody of you experimented with slow shutter speeds (more than a
>second), which should capture movements in 3D?

Sure.  Much easier task.  Try a bright street corner with lots of traffic
for between 30 seconds and several minutes.  The light trails are
facsinating. A cable release and heavy tripod are important.  The small
aperture is still important.

Best Wishes,

Tom



------------------------------