Marumi 86mm circular polarizer filter, as new, little use but without plastic case.
This is a high end performance lens filter was a "must have" on my Sigma 500mm zoom lens and often made the difference between poor and very good exposure and colour saturation. Well-suited for outdoor and nature photography, the 86mm Circular Polarizer Filter from Marumi helps to reduce reflections and glare by filtering out light that has become polarized due to reflection from a non-metallic surfaces such as water and glass. This results in a noticeable increase in the saturation of skies and foliage, as well as clearer imagery when photographing in hazy conditions. A circular polarizer differs from a linear polarizer in that it supports full use of a camera's autofocus and auto exposure functions.