Nikon NIKKOR Z 800mm f/6.3 VR S Lens - Manual (Page 33)

Filters
The lens is designed for use without filters, and can be used without a filter
inserted under most conditions. In situations in which a filter is required, an
optional 46 mm screw-on filter can be inserted in the slip-in filter holder as
described below.
Lift the slip-in filter holder tab, rotate it to (
q
), and
remove the slip-in filter holder (
w
).
33
Filters
1.