The Hoya 49mm HD3 UV Filter is a general use, clear filter designed to absorb ultraviolet light and reduce the bluish cast of daylight. Aside from the reduction of unwanted blue casts, no additional coloration or contrast is created, and adjustments to exposure are not required while using this filter. To prevent internal ghosting and reflections while providing over 99.7% light transmission, 16 layers of anti-reflection nano coatings are applied to each side. This total of 32 coatings offers a high degree of protection to the filter substrate and helps it to stay clean for longer than uncoated filters. The nano coating formula associated with HD3 UV filters results in an improved beading effect when in contact with water for greater cleaning efficiency and is also effective with regard to oil and stains.
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