Nikon NIKKOR Z 400mm f/4.5 VR S Lens - Manual (Page 25)

Using the Tripod Collar
Attach tripods to the tripod collar, not to the camera.
Be sure to securely tighten the tripod collar lock screw. Failure to observe this
precaution may result in the lens unexpectedly separating from the tripod,
causing injury.
Attaching the Tripod Collar
Align the slot on the tripod collar with the tripod collar mounting foot (
q
) and
then slide the collar onto the foot, not stopping until the foot is at the back of the
slot (
w
). Fully tighten the tripod collar lock screw once the collar is in position (
e
).
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Using the Tripod Collar