Image quality results from the EOS 5Ds R have been added to the Canon TS-E 24mm f/3.5L II Tilt-Shift Lens Review.
I think that you are going to like what you see. Provided are an extensive set of results that include 1.4x and 2x extender tests and four shift positions have been tested.
B&H has the Canon TS-E 24mm f/3.5L II Tilt-Shift Lens in stock.