Light pollution is caused by the bright glow of artificial lights from towns and cities. It can be a problem for photographers taking pictures at night, adding a yellow color cast, haze, and reducing sharpness and contrast in your low-light shots, whether it's cityscapes, landscapes, or astro work.
The best light pollution filters, such as Hoya’s Starscape light pollution filter, are designed to cut out specific wavelengths of light caused by artificial sodium and mercury-vapor lights – common in cities – with Hoya claiming the filter improves contrast and colors in night sky shots. I took it out after dark to test drive it and see how it performs.
