This Hama 82mm Polarising Filter is designed to bring brighter colours and the removal of reflections to your images.
The filter has two leayer of AR coating on each side of the lens which will give better light transmission. Anti-reflective coating (also called AR coating or anti-glare coating) improves images due to AR coating's ability to eliminate reflections of light from the front and back surface of lenses.
The impact on your photos of using this type of filter is that it puts contrast and depth in the picture, the sky gets blue, clouds get white and colours become clearer and brighter.
Depending on the angular position of the filter, contrast and depth will vary and non-metallic reflections (water, plastic, glass, etc.) can be removed. A shooting angle of 30-40° to the reflective surface will usually give the best effects.