Thanks Sten,
do you have an early NeoNoct (low serial) or a later version (meaning higher serial) of it?
My suspicion is, that the early models had some issue with max sharpness and resolution with open aperture, which later production runs mitigated. I had 2 samples and could compare them directly, one a low sn, the other higher (sn > 15000) which was noticeable better. But it could very well be just individual sample performance. But the interest is still there if it is more "systemic".
rgds, Andy