It's a one shot, no stitch pano. You straighten the horizon line back to level in post processing. A full frame fish eye is 180 degrees through the diagonal. You need a give up a little of the 180 degrees to get enough pixel height for the side, but you are still in the ~140-~160 degree range of horizontal coverage. The FF FE diagonally can shoot the panoramic in one shot, If there is movement (people, vehicles, clouds) you don't get artifacts from stitching.