Haida 105mm CPL Filter. High Quality Optical Glass Circular Polarizer Filter. 

Features front thread for use with multiple filters / hoods. 

Reduces glare in water and reflective surfaces. 

Enhances Colors, Darken Blue Skies turning them into deep rich blues. 

Protects your camera lens from dust, moisture, scratches and fingerprints. 

Double threaded to stack additional filters such as: ND, UV, etc. - 

No risk of filter mount related vignetting ( shadowing ) in the image corners. 

Includes plastic case.