Sigma WR Ceramic Protector 67mm

The Sigma WR Ceramic Protector is a highly protective clear glass filter constructed from Clear Glass Ceramic, an advanced material with outstanding strength. An extremely tough type of crystallized glass, it features the high transmittance required of optical devices whilst combining greater hardness than chemically strengthened glass and greater flexibility than sapphire crystal glass.

Price: 69.99 from Wex Photo Video