Sirui 18-WA-CPL Polarising Filter for 18-WA Wide Angle Lens ZNAČAJKE For Sirui Wide-Angle Mobile Lens Schott B270 Plate Glass Anti-Reflective Protective Coating Nearly 100 Polarisation Aluminum Filter Ring Neutral Colour Transmission Improve your smartphone photography with the Sirui Wide-Angle Circular Polarizer Filter. This filter fits over the Sirui Wide-Angle Mobile Lens and