While the night sky is often polluted with undesirable wavelengths of light from sources like mercury vapor, sodium, and low Cri Led streetlights, the NiSi 150x150mm Natural Night Filter is specifically designed to combat this issue. This high-quality filter effectively blocks the most common wavelengths of light pollution, allowing your camera to capture the night sky in its true form, enhancing the quality of your night-time photography.Constructed from precision annealed, optical glass, this durable filter boasts a finely ground and polished surface. This meticulous design ensures sharpness, catering to the needs of today's ultra-high megapixel cameras. The NiSi Natural Night Filter is not just effective, but also versatile, suitable for a range of photography styles and conditions.One of the standout features of this innovative filter is NiSi's unique Nano Coating technology.