Its outstanding protective capability is leading to high reliability. By combining much greater hardness than chemically strengthened glass and greater flexibility than sapphire crystal glass.
Clear glass ceramic is the ideal material for protective filters that achieve over 10 times the strength of a conventional protective filter.
Worlds first Clear Glass Ceramic Protective lens filter
Description
Sigma WR Ceramic Protector 95mm Its outstanding protective capability is leading to high reliability. By combining much greater hardness than chemically strengthened glass and greater flexibility than sapphire crystal glass. Clear glass ceramic is the ideal material for protective filters that achieve over 10 times the strength of a conventional protective filter. Worlds first Clear Glass Ceramic Protective lens filter
