Sigma 58mm EX DG Circular Polarising Filter

Reduces the glare and reflections from glass and water and other non-metallic surfaces. It deepens blue skies, and saturates the colours. The circular PL filter is designed to give best performance with AF Cameras. The wide multi coated circular polarising filter (52mm to 82mm) is very thin, so it does not cause vignetting with wide-angle lenses. You can monitor the changes at different angles through the viewfinder as you rotate this filter.