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The northern part of
Cygnus is filled with red nebulosity from glowing hydrogen gas. The North
America Nebula and Pelican Nebula are at top left, with Deneb at top center. The area
around Gamma Cygni at lower right is particularly rich in nebulosity.
Equipment: Nikkor
180mm f/2.8 lens/STL-11000M/Astrodon LRGB filters/Losmandy G-11
F-ratio: f/4
Exposures: RRGB: R 12 x 20 minutes: G 12 x 5 minutes: B 12 x 5
minutes: GB binned 2x2
Date: October 11 and 12, 2007
Location: Borrego Springs, California, USA
Technical Notes: Individual exposures were sigma combined. The RGB image was
created in Registar 1.0. Mild
gradients in the green and red channels were removed using Ron Wodaski's Gradient Removal
plug-in for CCDSoft. The RGB image was duplicated and combined with the original using
Soft Light with a opacity of 25% to enhance color saturation.