This NGC7000 and IC5070 widefield image was captured over about a week period. I needed to wait to image until around midnight as the region is to the east which is obscured by my garage until then. I collected around 3 hours of data each night beginning with H-alpha, then OIII, and finally SII. Processing was definitely a learning experience for me as this is the first SHO target I've attempted. As always, any critique on my acquisition or processing techniques is welcome. Thanks for taking a look.

On October 24, 1786, William Herschel observing from Slough, England, noted a “faint milky nebulosity scattered over this space, in some places pretty bright.” The most prominent region was catalogued by his son John Herschel on August 21, 1829. It was listed in the New General Catalogue as NGC 7000, where it is described as a "faint, most extremely large, diffuse nebulosity”.

In 1890, the pioneering German astrophotographer Max Wolf noticed this nebula's characteristic shape on a long-exposure photograph, and dubbed it the North America Nebula.

The North America Nebula covers a region more than ten times the area of the full moon, but its surface brightness is low, so normally it cannot be seen with the unaided eye. At optical wavelengths, the North America Nebula and the Pelican Nebula (IC 5070) appear distinct as they are separated by the silhouette of the dark band of interstellar dust. In 2020, the Gaia astrometry spacecraft measured the distances to the North America and Pelican nebulae at 2,590 light years from Earth. The entire region is estimated to be 140 light years across, and the North America nebula stretches 90 light years north to south.

Crops from the original widefield:

Cygnus Wall


Pelican Nebula


Processing Guide
Pre-Processing
Image Calibration
Cosmetic Correction
Subframe Selector
Star Alignment
Local Normalization
Integration
Drizzle Integration

Linear Processing (Ha)
Fast Rotation (90CCW)
Dynamic Crop
Automatic Background Extractor
TGV Denoise
Multiscale Median Transform
Deconvolution
Histogram Transformation (STF Stretch)

Linear Processing (OIII & SII)
Fast Rotation (90CCW)
Dynamic Crop
Automatic Background Extractor
TGV Denoise
Multiscale Median Transform
Histogram Transformation (STF Stretch)

Non-Linear Processing (Standard SHO)
Pixel Math (R = SII, G = Ha, B = OIII)
SCNR (Green, 0.40)
Invert
SCNR (Green, 0.60)
Invert

Non-Linear Processing (The Coldest Nights SHO)
Pixel Math (R = (OIII^~OIII)*SII + ~(OIII^~OIII)*Ha, G = ((OIII*Ha)^~(OIII*Ha))*Ha + ~((OIII*Ha)^~(OIII*Ha))*OIII, B = OIII)

Non-Linear Processing (Custom SHO)
Pixel Math (0.85 * The Coldest Nights SHO + 0.15 * Standard SHO)
LRGB Combination (L = Ha, Lightness = 0.6, Saturation = 0.4)
Curves Transformation (Contrast, Hue, & Saturation)
Dark Structure Enhance Script
Curves Transformation (Contrast)
Local Histogram Equalization
Morphological Transformation
Exponential Transformation (PIP)
Exponential Transformation (SMI)
Color Saturation
Invert
SCNR (Green, 1.00, Star Mask to Protect Image)
Invert
Color Saturation (Star Mask to Protect Image)
Resample