Canon 8-15 mm @ 8 mm with 3 Horizontal is out of the question because of reduced resolution.
But which on of these should I use:
Canon 8-15 mm @ 12 mm with 4 Horizontal and a nadir
Canon 8-15 mm @ 15 mm with Nadir + 4 Horizontal + Zenith
Canon 8-15 mm @ 15 mm with Nadir + 6 Horizontal + Zenith
I want to play "safe" with minimun stitching errors and a good resolution. The amount of pictures is not so much an issue.