Omegon Pro 12nm H-alpha Filter: Deep Sky Photos in Alpha Light
Young stars immersed in the reddish light of a nebula... The H-alpha filter is the perfect solution for photographing hydrogen nebulae in all their splendor. It doesn't matter whether you are under a dark sky or inside the city's "light dome": thanks to its 12nm passband, it only lets light above 650nm pass into your camera. This also blocks unwanted scattered light or light projected by mercury or sodium vapor discharge lamps.