The 77mm UV Protector Filter is a general use, clearfilter that helps to absorb ultraviolet light and reduce the bluish castof daylight. This filter is especially useful when photographing athigh altitudes or around bodies of water. No additional coloration orcontrast is provided, allowing you to pair this filter with others. TheUV filter is also useful as a general protective filter to leave onlenses at all times. Filters help to reduce dust and moisture fromreaching your lens element and provide additional protection in case ofdrops or situations where scratching could occur. UV  filtersare made using Color Core technology; a process that involves laminatingthe filter substrate between 2 pieces of optical glass, grinding flat toa tolerance of 1/10,000th of an inch, then mounting to precision metalrings. What is Multi CoatingCoating enhances light transmission, protects the surface of the filter and helps remove glare, particularly between the rear of a filter and the surface of the lens.Light transmission is proportional to layers of coating applied.Don't miss this fantastic opportunity to increase your equipment performance with this high definition filter lens. Absorbs some ultraviolet light and reduces bluish cast of daylight. Clear filter provides no additional coloration or contrast, allowing you to pair this filter with others. General protection filter reduces dust, moisture, and scratches from reaching lens elements UV Protector Filter protected the lens from damage