Finally got around to pulling some images off my 2nd Z5. Having somewhat better luck with it, but still struggling. The largest thing is that I am using both SD card slots. One is set to RAW, the other set to JPG. Camera is writing JPG to both slots and I can't figure out why.
Nikkor 55/1.2 (non-AI, I believe it's a K) SOOC, all processing was done in camera using the standard profile. Shot was at f/2.8.