Description:
The Cygnus Wall is just a portion of a much larger nebula called the "North America Nebula". It is the region of the massive cloud of gas & dust containing the highest concentration of new star formation - Many nebulas of this type are illuminated by stars showering the hydrogen clouds with inoized radiation; the entire cloud complex of the North America Nebula is thought to be ionized by UV radiation from a nearby spectral type O3.5 star, with another hot star in orbit!
This is my first try at an L+HaR+haGB+20%Ha composition of a nebula with Ha added to Luminance, Red & Blue channels - previously I've only done straight narrowband, or LRGB. It took at least 10 hours of editing on top of capturing to get it to this point but I think I'm happy with it. I chose to add 20% of what I added to Luminance & Red channels to Blue to simulate the Hydrogen Beta emission line. I used photometric colour calibration, then DBE, then extracted the Red channel & boosted it via pixel math with the Ha data, added it back in & re-performed background neutralization. After that besides saturation boost, and a very targeted deep red reduction to rid some stars of fringes I didn't mess with colours at all.
10.92 hour exposure as follows:
17 x 300s Luminance subs binned 1x1
20 x 900s Hydrogen-Alpha subs binned 1x1
18 x 300s Red subs binned 2x2
18 x 300s Green subs binned 2x2
18 x 300s Blue subs binned 2x2
+20 Flats, Darks, Bias
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