Scratch resistant

• • Hardness achieved Vickers hardness * Hv700. The hardness far exceeds that of the chemically strengthened glass used in general high-strength protective filters, preventing scratches that can cause breakage.
    *Vickers hardness: A diamond test piece is pressed against the material, and the hardness of the material is measured and quantified based on the size of the indentation produced.
    
    Realizes 10 times more strength than conventional general protectors and 3 times more strength than general chemically strengthened glass
    New material clear glass ceramic is a special manufacturing method that precipitates spinel microcrystals inside the glass. Achieved Vickers hardness Hv700.
    It is more than three times stronger than high-strength protective filters that use chemically strengthened glass of the same thickness, and ten times stronger than conventional protective filters.
    
    Realizes high transmittance
    Combined with the adoption of WR coating, it achieves a high transmittance that can withstand use as an optical glass.
    
    Uses WR Coat
    The WR Coat greatly suppresses light reflection, reducing flare and ghosting. Achieves a reflectance of 0.24% in the visible light range.
    In addition, with its excellent water repellency and antifouling properties, it repels water droplets and can easily wipe off fingerprints and other stains.
    In addition, the self-lubricating function of the WR coat has achieved scratch resistance performance that is more than 10 times higher than that of conventional multi-coating.
    In addition, it has an antistatic function that suppresses the adhesion of fine dust and dirt caused by static electricity, and even if it adheres, it can be easily blown off with a blower.
    
    Adopting newly developed materials from glass material manufacturer Ohara Co., Ltd.
    The material of the SIGMA WR CERAMIC PROTECTOR, "clear glass ceramic," uses crystallized glass newly developed by the company.
    
    The best case for filter storage
    Uses a special acrylic resin with increased flexibility and strength.
    By integrally molding the filter holder made of elastomer resin into this, the filter holder does not easily deteriorate over time even if you use it for a long time.
    In use, it not only prevents the opening and closing of the case carelessly, but also maintains high durability. It is the best case for filter storage.