Proposed by Sigma protective filters to be up to 10 times more durable than standard solutions.
Sigma Ceramic Protector is the first ceramic protective filter what we find in the mass production and sales. According to the manufacturer and preliminary opinion experts, the filter is characterized by much greater resistance and durability than previous proposals of competing firms. The result is therefore a product lighter and thinner, and at the same time not lose anything on their properties. Nay, even gaining, also in combination with chemically hardened filters. In relation to the latter we get a glass three times faster, which can boast a hardness of 700HV Vickers. Ceramic Protector was also coated with layers of oleofobowymi and hydrophobic, having a job does not allow for the deposition on the surface of fat and sludge remaining after water. Sigma did not disclose when they start to sell new filters . We know, however, that the stores they hit versions in sizes from 67 to 105 mm.Source: Sigma