Nikon 52mm Circular Polarizer (C-PL3L) Glass Filter - Drop-In

Dramatically reduces reflections from water and glass as well as rendering blue skies darker.
Designed for use with telephoto lenses that provide a slip-in filter holder, these filters reduce glare from non-metallic surfaces such as glass and water.
These filters do not affect autofocus or auto exposure operation.
Converts the bayonet mount of reverse-mounted lenses to the 52mm thread used for filters and hoods.
Simply turn the rotating ring on the holder to find the most effective position.
Both the C-PL1L and C-PL3L feature a diameter of 52 mm.