The Crescent Nebula in Cygnus
Apogee U16M w Astrondon Gen II RGB and 5nm H-Alpha and OIII filters
Planewave 12.5" CDK
Guided w ST-402 and Astrodon MMOAG
Mounted on a Paramount ME
Acquired with TheSkyX and CCD-Commander
9/8/7 x 10 min RGB
12 x 20 min OIII
11 x 20 min H-Alpha

PixInsight Processing:
RGB: GradientCorrection, SPCC, BlurX, MAS stretch, NoiseX and masked Saturation boost to highlights via Curves
Ha and OIII: GradientCorrectin, BlurX, MAS stretch, StarX
Save as TIFF
Photoshop:
Selective Colour and Colour Balance adjustments on the RGB then OIII and Ha layered over the RGB using Screen blend mode

Lucknow, Ontario
June 2026