For Night scenes & astrophotography. Between mercury vapor, sodium, and low CRI LED streetlights, there are many undesirable wavelengths of light that pollute the night sky. The glow from these can keep your camera from seeing the sky properly and ruin your night images. Because of this, NiSi has created the Natural Night Filter to block the most common wavelengths of light pollution, which means you get cleaner and nicer colors in your photos
