Nikon NIKKOR Z 400mm f/2.8 TC VR S Lens - Manual (Page 9)

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Focus ring
Use for manual focus.
• When focusing using autofocus, you can adjust focus manually by
rotating the ring while the shutter-release button is pressed halfway.
Focus
Due to the design of the focus system, shaking the lens while the camera
is off may cause it to rattle; this does not indicate a malfunction.
Tripod collar ring
“Using the Tripod Collar” (p.35)
Parts of the Lens: Names and Functions
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