This photo is
horrible in any conceivable aspect. Part of the misery is of course that the lens in question, Rodenstock TV-Heligon 50mm f/0.75, was hand-held and not aligned properly to the optical axis. A tilted lens in combination with a wafer-thin depth of field makes for an "uneven" distribution of sharpness
However, its importance -- to me -- is that it serves as a
proof of concept. With the Z9, the opportunity to apply the ultra-fast "X-ray" lenses for infinity focus now is feasible. I know how to achieve this and am only waiting for a special part in order to get a focusable superspeed system. I probably will deploy my Oude Delft 50mm f/0.75 instead of the Rodenstock as preliminary testing indicates the former has a much flatter field of view and thus reduces the amount of spherical aberration outside its designed imaging circle.