NiSi 77mm Natural Night Filter

The NiSi 77mm Natural Night Filter is specifically engineered to reduce light pollution in night sky photography and astrophotography. Constructed from precision annealed optical glass with NiSi’s NANO Coating technology, this filter selectively blocks the yellow and orange wavelengths emitted by sodium-vapour lamps, mercury-vapour lights, and low-CRI LEDs-common sources of light pollution in urban areas. With a 2x filter factor providing 1 stop of exposure reduction, this filter enhances the visibility of astronomical objects whilst maintaining natural contrast and colour fidelity. The waterproof and oil-resistant nano coating makes cleaning effortless, and the aluminium-alloy filter ring ensures durability and reliable performance.

• Blocks light pollution wavelengths from sodium-vapour, mercury-vapour, and low-CRI LED sources
• Precision optical glass with NANO Coating for reduced glare and enhanced colour transmission
• 2x filter factor (1 stop exposure reduction) ideal for long-exposure night photography
• Waterproof and oil-resistant protective coating for easy maintenance
• Fits 77mm front filter threads on compatible lenses