Nikon 52mm Circular Polarizer - Description:
In general, light reflected from water, glass, or other shiny materials is polarized and adversely affects image definition. Circular polarizing filters reduce or eliminate unwanted reflections and increase the overall contrast of subjects in low-contrast situations

Usually, light from the sky is polarized due to reflections and dispersions in the air. Circular polarizing filters cut these reflections, making the sky blueror intensifying colors.

Features
Much thinner and lighter than conventional models to cut vignetting on Wide Angle lenses
Multi Layer coatings on both sides to reduce ghost images and flare
52mm filter thread on front of filter for attaching Lens caps and hood