The Iris Nebula (NGC7023) LRGB

Iris Nebula LRGB

Here is the pure RGB. This was a very deep RGB so it stands on its own:

The Iris aka ngc7023 in pure RGB

and here is the Luminance only image:

The Iris aka ngc7023 Luminance

The Iris Nebula
Apogee U16M w Astrondon Gen II filters
Planewave 12.5" CDK
Guided w ST-402 and Astrodon MMOAG
Mounted on a Paramount ME
26/25/26 x 10min RGB, 21 x 10min Luminance
Captured with CCD-Commander and The Sky X

PixInsight Processing:
RGB: GradientCorrection, SPCC, BlurX, NoiseX, StarX then Starless version stretched with HistogramTransformation then DarkStructureEnhance then LocalHistogramEqualization.
Stars ONLY RGB image stretched with curves then a masked Saturation boost (curves). Stars added back via Pixel Math. Save as TIFF
Luminance: GradientCorrection, BlurX, NoiseX, StarX. Starless version stretched same as the starless RGB. Stars ONLY version stretched with curves then added back via Pixel Math. Save as TIFF

Photoshop: Clean up of the Lum and RGB plus some colour enhancement of the RGB then Save for Web. Then the Lum was layered over the RGB using Luminosity blend mode. Save for Web

Lucknow, Ontario
September 2025

Home