sky phenomena in stereo

[P3D Peter Abrahams <telscope@xxxxxxxxxx>]

" the northern lights...  I suspect the length of exposure required
to capture them on film, with the motion of the plane, would have made
for wholly unsuccessful stereo, however.  Has anyone on the list made
stereo images of the northern lights from the ground?"
An awesome idea.  There have been many successful aurora photos, they do
move over a time scale of fractions of a minute, but are bright enough to
capture, and possibly a plane could provide the right base.  Otherwise, two
photographers would have to take near-simultaneous pictures from some base
derived from their 60 to 80 mile altitude.  They are big and have little
detail, so a normal or slightly wide angle lens would probably be best.
Everybody loves stereos of clouds, and there are no end of other beautiful
sky phenomena, but many would need a wide angle lens and possibly a base
larger than one photographer could travel in the time allowed:
Stereos of crepuscular rays across the sky.
A rainbow (with a vertical leg) against a background.

For that matter: stereos of the moon or sun require a lot of planning & good
luck.  It might be much easier to obtain a series of satellite images of the
whole earth & make stereos of them.  The elevations of cloud layers might
even be noticeable.
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  Peter Abrahams    telscope@xxxxxxxxxx
the history of the telescope, the microscope,
   and the prism binocular


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