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Light Pollution Filter Clear-Night Nanopro Filter Optical Glass Enhances Visibility Artifi

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Light Pollution Filter Clear-Night Nanopro Filter Optical Glass Enhances Visibility Artificial Light Sources Reduction For Sky/Star (77Mm)|Item Condition: |New|Color: |Clear Night|Product Information|Principle :The Filter Can Improve The Results Of Nighttime Images By Absorbing The Yellow Light From Sodium-Vapor Lamps, A Common Light Source Within Urban Areas. By Preventing The Dominant Wavelengths Of Light Associated With The Color Of Those Lamps From Being Recorded, Filter Enhances Visibility Of Astronomical Objects.|Glass Coating :This Filter Is Constructed From Optical Glass For Clarity And Color Fidelity. Each Glass Surface Includes Multi-Coating Of Anti-Reflection Coatings, The Nano Coating Associated Provides An Additional Layer That Results In An Improved Beading Effect When The Surface Comes In