Nikon NIKKOR Z 400mm f/2.8 TC VR S Lens - Manual (Page 48)

Using the Lens on Cameras with a Built-
in Flash
Shadows will be visible in photos where light from the built-in flash is obscured by
the lens or lens hood. Remove the lens hood before shooting. Note, however, that
depending on the distance to the subject and lens focal length, shadows may
appear even when the lens hood is removed.
• For information on the subject distances and focal lengths at which shadows
will not appear in photos taken with a built-in flash, visit the site below.
https://downloadcenter.nikonimglib.com/
48
Using the Lens on Cameras with a Built-in Flash