08-23-2018, 08:51 PM
You must mean the Z55 
Whether this new Nikkor 50mm is comparable to the SonyZeiss 55mm... It most probably is, with its modern design and 2 aspherical elements.
MTF for the Nikkor AF-S 50mm f1.8G:
http://www.nikon-image.com/products/nikkor/fmount/af-s_nikkor_50mm_f18g/img/spec/04.png
MTF for the new Nikkor Z 50mm f1.8 S:
http://www.nikon-image.com/products/nikkor/zmount/nikkor_z_50mm_f18s/img/spec/pic_01.png
On this page somewhere the MTF for the SZ55mm f1.8:
https://www.sony.com/electronics/camera-lenses/sel55f18z#product_details_default
Yep, seems be able to even outperform it.
The Sony FE 85mm f1.8 is a nice affordable-ish lens indeed. It is also not overly complex, with 9 elements and no aspherical elements.

Whether this new Nikkor 50mm is comparable to the SonyZeiss 55mm... It most probably is, with its modern design and 2 aspherical elements.
MTF for the Nikkor AF-S 50mm f1.8G:
http://www.nikon-image.com/products/nikkor/fmount/af-s_nikkor_50mm_f18g/img/spec/04.png
MTF for the new Nikkor Z 50mm f1.8 S:
http://www.nikon-image.com/products/nikkor/zmount/nikkor_z_50mm_f18s/img/spec/pic_01.png
On this page somewhere the MTF for the SZ55mm f1.8:
https://www.sony.com/electronics/camera-lenses/sel55f18z#product_details_default
Yep, seems be able to even outperform it.
The Sony FE 85mm f1.8 is a nice affordable-ish lens indeed. It is also not overly complex, with 9 elements and no aspherical elements.