Svbony SV220 Duo-Band 7 nm narrowband filter (1.25")

The Svbony SV220 Duo-Band (1.25") narrow-band filter makes the work of astrophotographers using colour cameras in light-polluted urban environments easier. It passes light through only two very narrow wavelengths while blocking other wavelengths.

The Svbony SV220 Duo-Band (1.25") narrow-band filter has 90% and 94% light transmission at Hα (656.3 nm) and OIII (500.7 nm) wavelengths, such as those at which emission nebulae emit.

The filter comes in a handy protective case. The filter is not recommended for telescopes with a brightness of more than F5.