Light rays which are reflected by any surface become polarised and polarising filters are used to select which light rays enter your camara lens. · They allow you to remove unwanted reflections from non-metallic surfaces such as water, glass etc. · They also saturate colors and increase contrast and are threaded on both sides.
Specifications:
Creates dramatic sky/cloud contrast.
Saturates colors without changing color balance.
Mount rotates to control amount of effect.
Increases contrast equally well with black & white film.