Rainbows

[P3D Paul S. Boyer <boyer@xxxxxxxxxxxxx>]

I have taken rainbows in stereo, but not the meteorological ones --
they are too far away at normal base.  Rather, I have taken the
rainbows one gets with waterfalls (Bridle Veil Falls at Yosemite),
and this fall I took some shots of a man steam-cleaning an old
railroad engine.  The rainbows look, well, just as in real life.  I
think that it's a graet shop.  The judges haven't thought so yet.

A tip on rainbows: if you use a polarizing filter, you can optimize
the rainbow effect by rotating the polarizer to favor the refracted
rays from the water droplets.  It makes a big difference, without
looking fake.  This is difficult to do with a stereo camera, because
it is so awkward to get a rotatable polarizer, or a geared pair of
them.

--Paul S. Boyer   <boyer@xxxxxxxxxxxxx>


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