- German Schott Optical Glass
- Multilayer hardened waterproof and oilproof anti-reflection coating
- Extremely light CNC Aviation Aluminum Frame - each filter weights 0.8-1.2g
- Easy installation
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German Schott Optical Glass Multilayer hardened waterproof and oilproof anti-reflection coating Extremely light CNC Aviation Aluminum Frame - each filter weights 0.8-1.2g Easy installation