The filter blocks in the light spectrum between approx. 580 nm and 610 nm of sodium lamps and mercury arc lamps.
The yellowish/orange light is filtered out and there is virtually no light pollution left, the result is a much cleaner image.
The filter is provided with the excellent Haida Nano Multi Coating on both sides.

This filter is also excellent for night shots, such as Astro photography.

To use the 55mm Magnetic Clear Night filter on the lens, you need a 55mm Magnetic adapter ring, which can be found under the accessories tab.