Hoya HD Nano UV Filter (82 mm), Black.

• 32 layers (total) of ultra-resistant nano coating.
• Repels stains, water and grease.
• 800% more scratch-resistant than conventional filters.
• Extra slim mount and front slide for covers and other filters.

Improved protection, performance and durability: filter coatings do not last forever, because they are removed with cleaning and use, as well as by any bumps and scratches.A solid and scratch-resistant coating is a great advantage and the HD Nano filters have the hardest coating currently available.The Nano coating has been designed to protect the lens, while the curved UV filter does not affect the range of visible light.The HD Nano glass filter is 4 times harder than chemically enhanced optical glass.The nanoparticles adhere to the glass surface with greater density and create an extremely durable smooth surface.