Freewell 55mm Adapter Ring with Cap for The Real Locking L1 VND/CPL

55mm Base Ring - Creates a secure bond with your lens, providing a solid foundation for your VND/CPL filter and lens cap. NFC-enabled lens cap The two-tab locking cap secures your lens cap or filter, and NFC technology allows quick access to manuals, warranty and support. Lens Protection This easy to use locking cap protects your lens from dust, dirt and scratches, so it stays in perfect condition when not in use.