NiSi 77mm Natural Night Filter (Light Pollution Filter)

The NiSi Natural Night Filter is built specifically to block the mercury vapor, sodium, and low-CRI streetlight wavelengths that wash out the night sky in urban and suburban astrophotography. It's NiSi's first filter designed exclusively for night photography rather than a general-purpose color or ND filter repurposed for the task. Precision annealed optical glass keeps the image sharp on today's high-megapixel cameras, so blocking light pollution doesn't cost resolution.

• Blocks common light pollution wavelengths: Filters out mercury vapor, sodium, and low-CRI streetlight glow that otherwise washes out night skies.
• Precision annealed optical glass: Finely ground and polished for sharpness on ultra-high megapixel cameras.
• NiSi NANO Coating: Multi-layer coating reduces reflections that cause ghosting and flare.
• Easy-clean protective layer: Wipes clean of water, dust, and oil without scratching the glass, with no loss in sharpness.