Nikon NIKKOR Z 400mm f/2.8 TC VR S Lens - Manual (Page 47)

Technical Notes
Cameras with AF-Assist Illuminators
The lens or lens hood may block the light from the camera AF-assist illuminator.
• For the information on using the lens with cameras that have built-in AF-assist
illuminators, visit the site below.
https://downloadcenter.nikonimglib.com/
47
Cameras with AF-Assist Illuminators