A high transmission filter made with professional grade optical glass in a slim mount ideal to use as a constant protector for the front element of your lens features 9 layers of super multi coating for ultra clear high light transmission professional grade hoya optical glass super slim filter ring to avoid vignetting on super wide angle lenses anti static coating is dust and water repellent scratch and stain resistant fingerprint and smudge resistant available in diameters from 37mm to 82m