SIGMA WR Coating Protector, 55mm size, protects your lens. - Brand: SIGMA - Model Name: WR Coating Protector - Size: 55 mm - Type: Protective Filter This filter is designed to protect your lens. It prevents dirt, dust, and scratches from damaging the lens surface. It is completely colorless and does not affect color reproduction, making it ideal as a regular-use filter. Features WR Coating The WR coating significantly suppresses light reflection, reducing flare and ghosting. It achieves a visible light reflection rate of 0.24%. In addition, its excellent water-repellent and anti-fouling properties strongly repel water droplets, and fingerprints can be easily wiped off. Furthermore, the self-lubricating function of the WR coating achieves more than 10 times the scratch resistance of conventional multi-coatings. It also has an anti-static function that prevents fine dust and dirt from adhering due to static electricity, and even if they do adhere, they can be easily blown away with a blower. Thank you for viewing.