The Tarantula Nebula, Chile

RGB H-alpha modified camera.

65 x 2 min = 2.2 hr total exposure

Stacked and processed in PixInsight with the following steps:

• Weighted Batch Preprocessing (dark subtraction, cosmetic correction, local normalization, integration by PSF Signal Weight, drizzle integration)
• Dynamic Background Extraction
• Spectrophotometric Color Calibration (avg spiral galaxy white ref.)
• BlurXTerminator
• Histogram Transform to non-linear
• StarNet2 to separate nebula from stars
• HDR Multiscale Transform
• Local Histogram Equalization
• Curves for contrast and saturation
• Shrink stars and recombine
• NoiseXTerminator
• Multiscale Linear Transform (sharpen)

I did not try to alter the color from the calibrated results, but I was surprised how much blue is present.