This 100×100 mm optical Clear-Night filter is designed to reduce the effects of artificial light pollution during night photography and astrophotography. It selectively absorbs common yellow sodium-vapor wavelengths while maintaining natural color balance and image sharpness.

Constructed from high-quality optical glass with multi-coated nano layers, it minimizes reflections and surface glare. The square filter format ensures compatibility with standard 100 mm filter holder systems, making it suitable for night cityscapes, star photography, and long-exposure imaging.