WR Protector Ceramic Filter 72mm - SIGMA

The SIGMA WR 72mm ceramic protective filter é a highly reliable filter with an impressive protection capability. With numerous aerospace applications and applications in other industries, ceramic glass is a a type of crystalline  extremely resistant glass. This advanced material offers better rigidity than chemically strengthened glass, offering greater flexibility than sapphire crystal glass. These qualities make glass ceramic the ideal material for lens protective filters.

• Highly shock resistant: In conventional filters, only the surface is é  reinforced through a chemical process. In the case of this filter, the ceramic glass heat treatment, offering it a constant resistance. Ceramic glass é the ideal material for protective filters, being resistant to breakage.
• Scratch resistant: Ceramic glass offers a number of Vickers resistance of 700HV, a much higher resistance level than chemically reinforced glass. This filter has 10 times the strength of a conventional filter, and 3 times the strength of chemically fortified glass.
• Water-repellent coating: This coating only reflects  0.24% of visible light, minimizing "flare" and "ghosting". Its ability to repel both water and oil é excellent: the water simply does not cling to & agrave; surface, and the fingerprints are easily removed with a cloth.