Sadly, the 35mm lens I bought doesn't seem to be working properly. I can't select F/22 on the ring, it stops at F/16 and won't turn any farther. Also, no matter what I do I can't get the lens to actually stop down as I can with all the others. The aperture blades just never start to close down. I'm going to need to send it back, or else shoot nothing but F/3.5 I'm easily able to see the other lenses stop down in several different ways so I'm pretty confident the lens is faulty and not the operator.
Sounds like maybe someone who didn't know what they were doing took it apart and put it back together wrong.