Thank you guys for the advice and encouragement. I used a wireless remote to trigger the shutter but perhaps didn't wait long enough for the lens to stop shaking completely. Plus, the v. short reach of the wireless remote got me bumping into the camera a lot.
As far as stopping down, I tried it at +/-5.6 (wide open), at 8, 11, 16 and this is the best I got. Clearly, I need to experiment more with the aperture. Still not quite sure what PK-Q adapter (Fotodiox) does with a lens that has its own aperture ring, do I leave it on Open?
I will definitely wait for the moon to climb higher before my next attempt. And, so many other lenses to try
It does look a wee bit better in b&w, I think