Evaporation with Ion assisted deposition coating technology for durability and resistance to scratchingas well as stability on CWL central wavelength no deviation affected by temperature change
#2
Planetary rotation system offers precision and homogeneity of coatings ensuring high value on transmission of passband and Optical density of off band
#3
90 transmission of main nebula emission linessuch as Ha 656nmOIII 496nm500nmSII672nm and Hbeta 486nm
#4
01 transmission of offbandspecifically the major emission lines of artificial light pollutionsuch as Na 589nmHg 435nm and 578nm
#5
Suitable for color CCD cameras and unmodified DSLR Urban optical filter can effectively suppress urban harmful light and improve the contrast of shooting target
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