The lens shade helps block light reflection/refraction caused by the Interactionof the external color filter and the port. It also protects the acrylic optical surface of the port element from scratches and damage. This Shade attaches to the SKU: IK5503 Dome Port making it a #5503.20 Dome Port suitable for the Nikon 18mm and 20mmD lenses. Shade is made of durable non corrosive plastic.
This product has a limited warranty of 24 months.