Focal Pointe Observatory
Astrophotography by Bob Franke
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Nebulae (Hydrogen Alpha Filtered)

Narrow band hydrogen alpha filters greatly increase the contrast in emission nebula.  These objects emit H-Alpha light, having a wavelength of 656.3 nm (Red light).  I use a 6nm Ha filter, which basically allows wavelengths of 653 to 659 to pass.  Everything else is filtered out, including city light pollution and moonlight.  Most of the data, for the images on this page, were taken when the moon was very bright.  Although the images are simple black and white, I find them pleasing in a more artistic sense.

  

Sh2-132 Sh2-171 Sh2-98 Sh2-115
NGC 7000 Sh2-129 NGC 2174 Sh2-115

IC 1396

IC 2177

IC 59 & 63

IC 405

Heart Nebula

Cone Nebula

Sh2-199 Soul Nebula

Sh2-157 The Claw

NGC 7822

Heart Nebula

Bubble Wide Field

NGC 7000 & IC 5070

M27 Dumbbell Nebula

M8 Lagoon Nebula

IC 434 Horse Head

Thor's Helmet

Cone Nebula

IC 5067

Tulip Nebula

Rosette Nebula

IC 405

Jones-Emberson 1

IC 1848

IC 1805

The Wizard

IC 443 & Sh2-249

Jellyfish Nebula

Orion Nebula

Witch's Broom

Sh2-86

Cave Nebula

Propeller Nebula

Crescent Nebula

Veil Nebula

Bubble Nebula

IC 434 Horse Head

IC410 - The Tadpoles

Cygnus Wall

Pacman Nebula

Melotte 15

Rosette Nebula

California Nebula

IC 434 Horse Head

SH2-154 & 155