Areas near or above cities and other concentrated light sources are known to suffer from light pollution. These sources include street lamps, billboards, and entertainment venues. The NiSi 67mm natural night filter can improve the visibility of nighttime images by preventing yellow light from coming from mercury-vapor, sodium-vapor, LED, or low-color rendering index lamps. It can also enhance the clarity of artificial light sources and reduce glare. The Filter utilizes optical glass for its clarity and color fidelity. The surface of the glass is treated with a nano-coating that reduces glare and enhances the transmission of light. It also features a resistance coating that can be used for easy cleaning.

• Reduces Light Pollution in Night Sky
• Blocks Yellow Sodium-Vapor Light
• Blocks Yellow Mercury-Vapor Light
• Blocks Yellow Light from Low CRI LEDs
• 2x Filter Factor, 1-Stop Correction
• H-K9L Optical Glass Construction
• Nano Coating and Resistance Coating
• Aluminum-Alloy Filter Ring
• 67mm Front Filter Threads
• Plastic Case

Warranty.