The two photos above were taken consecutively
(a 30-minute shot, followed by a 40 minute shot).
During this time, the comet moved very slightly at
this image scale. Reminded by the recent S&T article
on Akira Inaka's 3D constellation shots, I decided to
try to arrange these shots for a 3D view of the comet.
If you've never tried 3D viewing, the idea is to "cross"
your eyes so that the two panels above become a panel of
three images, with the center one appearing as the
3D image. If you have difficulty understanding that,
try holding your finger up between your eyes and the
images on your screen. At some distance, with your finger
in focus and the photos in the background, you will see
the apparent third center photo form. Now try focusing
on the middle photo. The comet should seem slightly
raised above the photo while the stars remain flat on