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Key Features
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Reduces Light Pollution in Night Sky
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Blocks Yellow Sodium-Vapor Light
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Blocks Yellow Mercury-Vapor Light
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Blocks Yellow Light from Low CRI LEDs
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1.5-2.8x Filter Factor, 0.6 to 1.5 Stop
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H-K9L Optical Glass Construction
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Nano Coating
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Aluminum-Alloy Filter Ring
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52mm Front Filter Threads
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Plastic Case
NiSi 62mm Natural Night Filter
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