See and Buy this product on Amazon.com store (affiliate):
DPReview9.3 The Nikon Z 50mm F1.8 S is a powerful standard lens for the Z system, offering outstanding sharpness and full-aperture performance. There are better 50mm lenses on the market for portraiture, but none that are sharper or so well-corrected for coma and longitudinal chromatic aberration when shot wide open.
DxO Mark Score 44. This lens’s sharpness is particularly impressive not just centrally, but across the whole image field—from the center out to the edges and corners. Sharpness is good from the initial aperture of f/1.8, but it’s best in terms of peak sharpness at f/2.8. After that, the sharpness becomes more uniform across the image field (frame) and up until around f/5.6-8 [...] Lateral chromatic aberration is well-controlled... Noteworthy for its low levels of distortion.