Evaporation with Ion-assisted deposition coating technology for durability and resistance to scratching;as well as stability on CWL (central wavelength) no deviation affected by temperature change
Planetary rotation system offers precision and homogeneity of coatings ensuring high value on transmission of pass band and Optical density of off-band
90% transmission of main nebula emission lines;such as Ha 656nm;OIII 496nm;500nm;SII672nm and H-beta 486nm
SVBONY moon filter is a good all rounder filter suited to many applications;including the observation of the moon and planets;a broad spectrum of light transmission means it does not block as much as a deep sky filter
Effectively filters out selective wavelengths of low pressure sodium and other man made sources typically used in street lighting;give improved definition of the surface of the moon
وصف
SVBONY 2 inch telescope moon filter is especially useful to owners of large-aperture scopes. Enhance lunar and planetary view. It can also be used for as a useful light pollution filter.