SUPERIOR CLARITY - Crafted from H-K9L optical glass, this 95mm filter ensures exceptional image clarity and sharpness, maintaining the highest quality for your astrophotography. REDUCE LIGHT POLLUTION - Specifically designed to block yellow light from sodium and mercury vapor lamps, as well as low CRI LEDs, enhancing the contrast and details of the night sky. OPTIMIZED TRANSMISSION - Experience minimal light loss with a filter factor of 1.5 to 2.8 (0.6 to 1.5 stops), preserving the natural colors and brightness of celestial objects. ENHANCED NIGHT SCAPES - Capture breathtaking nightscapes by effectively reducing the appearance of light pollution, revealing the true beauty of stars and galaxies in your images.