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Astrophotography under a light-polluted night sky can be difficult. The solution is an H-alpha filter. The Astromania H-alpha cut-off filter works to filter out a large part of this light pollution.
With a bandpass of 12nm, only light above 660nm is allowed into your camera - whether under dark skies or under the sky glow of a city. That means the filter also blocks the infamous stray light and light from mercury and sodium vapour lamps.
Young stars embedded in the bright red of a nebula - an H-alpha filter is the expert if you want to capture hydrogen nebulae in all their glory.
The Astromania H-aplha cut-off filter enhances the contrast between object and sky, allowing you to take good quality images even under urban skies.
Metal filter cell threads directly into the 2-inch barrel of your telescope eyepiece. Mounted in a nicely anodized housing.

Description

Astromania 2" Narrowband NBPF Hydrogen-a 12nm Filter. Astrophotography under a light-polluted night sky can be difficult. The solution is an H-alpha filter. The Astromania H-alpha cut-off filter works to filter out a large part of this light pollution. This convenient filter only allows wavelengths above 660nm through, which means it blocks a large part of the scattered light and also blocks the light from artificial mercury and sodium-vapour lamps. Young stars embedded in the bright red of a nebula - an H-alpha filter is the expert if you want to capture hydrogen nebulae in all their glory. The Astromania H-aplha cut-off filter enhances the contrast between object and sky, allowing you to take good quality images even under urban skies. Metal filter cell threads directly into the 2-inch barrel of your telescope eyepiece. Mounted in a nicely anodized housing.