Thanks to reader Mick Klass, who submitted his results for the new Nikon 20mm f/1.8 S Nikkor Z lens at 720mm infrared. His results showed excellent performance through f/8, with a mild hotspot appearing at f/11 and above. As such, I give the 20mm f/1.8 S Nikkor a “good” rating on my Nikon Z infrared testing chart.
Hi Jason, thanks for the exhaustive database of Z lens performance. Unfortunately, my experience with this lens is very different. I have a full-spectrum converted Nikon Z6 and with a 720nm filter, my copy shows a noticeable hot spot/color change in the middle of the frame definitely by f5, or even below depending on shooting conditions.