MC-21, but I do have one correction, my lens is the EF-S 10-22mm not the EF-S 10-18mm. My EF-S Sigma 18-35mm does work and I have one other crop sensor lens (can't remember the details on it) but that one worked as well.
I only have 3 EF-S lenses but out of the 3, only the EF-S 10-22 did not work. Below is a picture of the problem with the EF-S 10-22mm mounted on the MC-21 with the S5. This is with the 10-22mm zoomed all the way in to 22mm. at the 10mm end it is way worse.