Celestron 94124 2 inch UHC/LPR Filter with Multi Layer Dielectric Coatings Optimises Spectral and Optical Characteristics for Improved Celestial Viewing, Black

LIGHT POLLUTION (LPR) FILTERS: Designed to selectively reduce the transmission of certain wavelengths of light. ULTRA HIGH CONTRAST (UHC) FILTER: Offers darker sky backgrounds and improved contrast of emission nebulae. IMPROVED TRANSMISSION: Advanced technology coatings enable the filter to achieve a transmission of over 97% across the entire bandpass with total blockage of prominent light pollution lines. MULTI-LAYER DIELECTRIC COATINGS: Plasma assisted and Ionbeam hardened using the latest technology for durability and resistance to scratching. OPTIMUM SPECTRAL AND OPTICAL CHARACTERISTICS: The UHC/LPR Filter 2 inches retains natural views, resulting in the highest quality celestial images.