Nikon 77mm NC Neutral Clear Filter A clear (colorless) filter for color as well as black and white films. Also serves as a permanent lens protector. Multi-coated to minimize reflection at the filter surfaces which reduces flare and ghosting. Nikon 77mm Circular Polarizer II Thin Ring Multi-Coated Glass Filter 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. 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 Filter thread on front of filter for attaching Lens caps and hoo