Double narrow band astronomical special filter is an optical filter with double passband characteristics specially designed, optimized and produced according to the different characteristics of celestial emission light and light pollution emission light.
The double narrow band special astronomical filter can highlight the nebula color of celestial bodies in use, and filter out most of the emission light generated by light pollution at the same time.
The dual narrowband astronomical dedicated filter can make the imaging sky background darker and improve the contrast and signal-to-noise ratio between nebulae during the imaging process. In the light pollution disaster area, the special double narrow band astronomical filter can filter out most of the impact of light pollution, thus improving the final effect of astronomical telescope photography.
