Nikon NIKKOR Z 20mm f/1.8 S: Astrophotography
For astrophotography, wider is often better, and 20mm is a key focal length.
This page looks at the f/2 performance of the Nikon NIKKOR Z 20mm f/1.8 S on an 11-minute exposure.
Nikon NIKKOR Z 20mm f/1.8 S: Astrophotography at f/2
Includes len analysis along with commentary of the Nikon Z7 image quality (poor).