Nikon LC-K108 Slip-On Front Lens Cap
You can use this Nikon LC-K108 Slip-On Front Lens Cap as a backup or to swap out the one that came with the NIKKOR Z 26mm f/2.8 lens. The front element is protected by this special cap, which is designed to fit the lens's small, pancake form factor. It guards the lens against grime, sand, scratches, and light impacts.
