new v cheap lens! and it works (with a quirk) this time! the sigma af super wide II. 24mm is fun on aps-c.
the quirk is that the lens communicates its aperture as one stop higher than it's actually set to so you have to avoid dialing the aperture to "wide open" (2.8) if controlling it via the camera or then it glitches, and you're always one stop wider than you set to (need to keep it in mind and exposure comp -1 stop). guess this means that it only stops down to f/16 and not f/22 (unless set manually with the aperture ring), but That's Really Not An Issue To Me.