I did some digging and found this info on another forum: (I've never had to send in a Nikon product for warranty so take this info for what it's worth...)

From Nikon:

We wanted to make you aware of a change that will take place regarding Nikon Inc.’s Sport Optics product warranty program. After review, we have decided to make some program adjustments that will require changes to in-store, online and other marketing materials.

PROGRAM CHANGE: Nikon Inc.’s product warranty is changing from the current product warranty to the following:
Lifetime limited warranty for the optical system of Binoculars, Fieldscopes and Riflescopes;
Seven-year limited warranty for non-optical system components of Binoculars, Fieldscopes and Riflescopes;
One-year limited warranty for electrical components of Binoculars, Fieldscopes and Riflescopes.

Last edited by CamNWIA; 01/19/23. Reason: More info