This is the top-of-the-line "WR CERAMIC PROTECTOR" lens protection filter (77mm diameter) from SIGMA. Made in Japan, a mark of quality. It uses "Clear Glass Ceramic," a special material that is harder than sapphire crystal glass. With its overwhelming strength, it perfectly protects the front of your valuable lens from unexpected impacts. ▼ Features of this filter: 【Ultimate Protection Performance】 It employs the revolutionary "Clear Glass Ceramic" material, which has over 10 times the strength of conventional products. It is scratch-resistant and boasts extremely high durability. 【Optimized Optical Performance for SIGMA Art Lenses】 It features an ultra-low reflection coating that maximizes the performance of SIGMA's flagship "Art line" lenses. 【Excellent Maintenance】 It is coated with a water-repellent and anti-fouling coating that strongly repels water droplets and fingerprints, making maintenance very easy. ▼ Condition and Accessories 【Condition】 I have used it with care, so there are no noticeable scratches or coating剥げ (peeling) on the filter glass surface, and it is in very clean condition overall (beautiful condition). 【Accessories】 Filter body, dedicated case. Please feel free to ask if you have any questions. #SIGMA #Sigma #LensFilter #ProtectionFilter #Protector #77mm #MadeInJapan #ArtLens