Created 8-Nov-12
Modified 17-Aug-14
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Hydrogen alpha (Ha) imaging is done through an Ha filter. Hydrogen alpha is a specific wavelength of red light that measures 656.28nm and cannot be detected by the human eye. Hydrogen alpha is highly abundant in space and is the brightest wavelength in stellar astronomy.
Hydrogen alpha filters allows for great detail to emerge from emission nebulas and when added to color images gives great detail to a final image.
Narrowband imaging is ideal for those of us imaging from light polluted skies. Since the Baader Planetarium 7nm Ha filter, used here, blocks out all light except hydrogen-alpha emissions, one can get fine detail without the sensor becoming washed out from the glowing sky.

Melotte 15 in Ha

Melotte 15 in Ha

NGC 2264 the Cone and Fox Fur nebula

NGC 2264 the Cone and Fox Fur nebula

IC 443 the Jellyfish nebula

IC 443 the Jellyfish nebula

the Flaming star nebula

the Flaming star nebula

Rosette nebula

Rosette nebula

IC 410 the Tadpoles

IC 410 the Tadpoles

IC 1805 the Heart nebula

IC 1805 the Heart nebula

IC 1848 the Soul nebula

IC 1848 the Soul nebula

NGC 1499 the California nebula

NGC 1499 the California nebula

the PacMan nebula

the PacMan nebula

the Horsehead nebula

the Horsehead nebula

M8 the Lagoon nebula

M8 the Lagoon nebula