For shooting (or more precisely, trying to shoot) stereo panoramas, I've built this setup:
I've made a frame to hold the two Sony V1 in a vertical position (they are not back to back but rather stacked, the stereo base is about 8-9 cm).
The frame with the two cameras is attached to a Panosaurus spherical panoramic
head
mounted on a Velbon tripod.
Both V1 are equipped with Raynox
wide-angle converter x0.66 giving a focal length of about 22mm (24x36
equivalent). They are not great converters: not very sharp and chromatic
aberration in the corners but when the pictures are stitched together it's
not that bad. The converters also limit the minimum achievable stereo base as
they are quite large (in comparison to the cameras).
I first started with only one camera (Nikon CP5700) and no converter, but it was a real nightmare: 62 pictures in fives rows were needed to complete the sphere, then repeat the whole thing for the second picture of the stereo pair!
With the Raynox, only 3 rows: 0° - 8 pictures; -45° - 6 pictures (with large parts of the pano head and the tripod in them!) and +55° - 6 pictures overlapping at the zenith and a final nadir shot (-90°) with the cameras handheld, the tripod been removed (but not my feet!).
With my new setting I have to press the shutter button of the LANC Shepherd only 21 times. I’ve also reduced the horizontal overlap between two successive pictures from 50% to about 33% (that might not be a good idea...).
The pano head is adjusted for the right camera (rotation around the nodal point of the V1+Raynox) so the left panorama takes all the parallax errors and is much harder to assemble (misalignment, deformations, shadows on objects,...).
You can generate directly a JPEG file and work on it to correct the stitching errors. Alternatively you can generated a layered file (TIFF or Photoshop PSD files). The layered file has as many layers as there were source pictures (another nightmare with the 62 pictures: you have a 400-500 MB file with 62 layers...). You then work on the transparencies of the layers to correct the problems.
See my stereo panos on stereoscopie.fr, for instance :
- Paris
- Haute-Savoie
Look for the 
icon.
- or on my Pano+ web site. Most are in the Stereo
section (select Stereo in the first drop-down list) but you will find other stereo panos in the
other sections too.