Nikon NIKKOR Z 180-600mm f/5.6-6.3 VR Lens (Z) - Manual (Page 10)

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Lens mounting mark
Use when mounting the lens on the camera.
“Attachment and Removal” (p.16)
Rubber lens-mount gasket
Helps prevent the ingress of water droplets or dust along the surfaces
where the lens and camera meet when the lens is mounted on the
camera.
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There is no guarantee that the gasket is completely proof against the
ingress of water droplets or dust in all circumstances.
CPU contacts
Used to transfer data to and from the camera.
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Parts of the Lens:
Names and Functions
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