At last my focusing adapter for the "X-ray" lenses reached a prototype stage. The first version allows infinity focus for the Rodenstock TV-Heligon 50mm f/0.75 and the Kowa 55mm f/0.8, but not for the Oude Delft 50mm f/0.75 Rayxar (yet). The next version should solve that small remaining issue.
The adapter works on all Z/FX models apparently.
A late evening test shot with Z9 and the Heligon.