A quick experiment to produce an even larger file (70mp) stiching three shifted images on a D800E (link to large jpeg file) using the Nikon 24mm F/3.5 PC-E lens
And a smaller version
Sorry for the messy kitchen
Bear in mind that this is a kitchen in a very old house where the ceiling meanders all over the place, so it is not a good check of distortion. 70MP file.
Some vignetting, and some fall off at the edges of the frame. The main issues with this lens are the fiddly little control knobs and the very coarse focusing between 2m and infinity making achieving accurate focus a bit of a pain.