Overview: Highlight High quality optical glass for increased picture contrast Eliminate reflection from non-metallic surfaces & picture washout Specification Circular polarizer (CPL) enables you to remove unwanted reflectionoriginating from non-metallic surfaces such as glass & water which is not possible to achieve using computer software. In addition to the reflection removal feature, CPL filters also ensure the colors taken to be more saturated & contrast which is specially useful during outdoor picture taking under bright sunny conditions (eg: contrast between buildings & sky are further enriched). Optics: Clear optical glass with CPL film Housing: Aluminum Mounting diameter: 25mm to 86mm Inner thread: Yes Specification:12.0 x 10.0 x 2.0 cm