Description
The Sigma 105mm Wr Clear Glass Ceramic Protective Filter is the world's first Clear Glass Ceramic Protective lens filter. It is made of clear glass ceramic, which is much harder and more flexible than sapphire crystal glass, and has greater protective capability than chemically strengthened glass. It is designed to protect the lens from scratches and other damage.
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.
World's first Clear Glass Ceramic Protective lens filter
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