RF600mm cannot find serial number

[DakangWu]

I just bought a RF600mm f4.0 from B&H. I try to register my lens, but cannot find serial number. Can anyone help me to find it? Thanks

[shadowsports]

Greetings,

😊

Its on the lenses box

Its on your B&H receipt

Its on rhe USA Warranty Card

Its also on the lens.

Either on this black ring or the lens barrel itself

Here's a link to your other post:

https://community.usa.canon.com/t5/EF-RF-Lenses/RF600mm-f4-0-feels-like-a-ball-rolling-inside/td-p/5...