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.
Works first Clear Glass Ceramic Protective lens filter
Description
The Sigma WR ceramic protector is the worlds first clear glass ceramic protective lens filter 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. Works first Clear Glass Ceramic Protective lens filter
