Hoya 77mm Circular Polarizing Filter
Light rays which are reflected by any surface can become polarised so polarising filters are used to select which light rays enter your camera lens. CIRCULAR PL filters allow you to remove unwanted reflections from non-metallic surfaces such as water, glass etc. They also enable colors to become more saturated and appear clearer with better contrast. This effect is often used to increase the contrast and saturation in blue skies and white clouds. HOYA's polarising filters do not affect the overall color balance of a shot.
Why Coated?
There are three main reasons why filters should be coated. First, coating enhances light transmission, second, it protects the surface of the filter and third, it remove ghosting and flare, particularly between the rear of a filter and the surface of a lens. In general, light transmission increases as more layers of coating are applied.
03.18.2013AL
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