Nikon NIKKOR Z 100-400mm f/4.5-5.6 VR S Lens - Manual (Page 11)

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Tripod collar ring rotation index
Use when rotating the camera to shoot in landscape (“wide”) or portrait
(“tall”) orientation.
“Using the Tripod Collar” (p.29)
Tripod collar ring
“Using the Tripod Collar” (p.29)
Lens mounting mark
Use when mounting the lens on the camera.
“Attachment and Removal” (p.20)
Parts of the Lens: Names and Functions
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