I got myself a late little Christmas present, a (not quite) cheap Korean 8mm lens, and I’m seeing what I can do with 180°. The picture above of the full length of the Wichita cathedral’s ceiling is essentially a single frame. ((To be precise, It’s three exposures combined via Photoshop’s HDR function, but they’re stacked on top of each other, so to speak, rather than stitched side-by-side into a panorama. Each exposure contained the entire ceiling.)) The lens is manual focus, but that hardly matters: set the focus to two or three feet, and at f8 the depth of field contains the whole world.
Using the new lens, I did successfully make a spherical panorama, without the tripod visible, with just seven exposures. It’s not really difficult, but it’s not quite as easy as Florian Knorn would have you believe, at least with the freeware I use.