I see cyan/red fringes on most of the poles on the left side, which should be easy to remove with the correct values for the two CA sliders of the lens correction filter in PS or LR (or equivalents). It will make the image look sharper -- as it is you're basically looking at a double or triple image, because of the different magnifications for the different colours.
This is my first image post on here. After I saw all the beautiful shots posted using 'old lenses, I just had to try them for myself.
This is a 7 shot pano using the Distagon 28mm f/2.8 on a 1D Mk3. I even had to tone down the colours a bit! Not something I've needed to do with my Canon lenses