How filters work
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HOYA STARSCAPE light pollution cut filter is designed to cut off unwanted light pollution. The filter cuts light transmission in the area of the spectrum that is usually associated with light pollution from Sodium and Mercury-vapor lights common to most cities world-wide. Thus, the filter provides a more clear image with natural colors and improved contrast in the night sky.
Since the color tint that comes from urban areas varies depending also on the camera and lens combination, a useful trick is to shift on WB and correct the color each time before shooting. In addition, this filter produce the best effects when combined with wide angle lenses.
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