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Omegon pro H-alpha 12nm filter - deep sky photos in H-alpha light
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. With a bandpass of 12nm, only light above 650nm 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.
