Nikon NIKKOR Z 400mm f/2.8 TC VR S Lens - Manual (Page 10)

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Slip-in filter holder
For use with optional 46 mm screw-on filters.
“Filters” (p.38)
Slip-in filter holder tab
Use when inserting or removing the filter holder.
“Filters” (p.38)
Parts of the Lens: Names and Functions
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