SV220 2'' Dual Narrow bandwidth SII/O-III 7nm narrowband filter properly designed for astrophotography both in light polluted
Allows for imaging in bright man-made light pollution and moonlit conditions; Useful for imaging emission nebulae; planetary nebulae and supernova remnants
Designed to sharply cut off the inference of artificial light from sodium vapor or mercury vapor street lights and other unwanted disturbance like sky glow