North American nebula (part)

Date 24/05/2017. Part of the North American Nebula.

Weather: Probably the best conditions I have ever had imaging, very still atmosphere and clear skies. The guide scope stayed on target the entire night.

Optics and camera: Skywatcher Evostar 120 F/D=8.33 (Achromat) with a Baader UHCs filter (for removing light pollution). The camera was a IR-filter removed Canon 600D.

Settings: 58 x 3 minute lights, 50 darks from library, 50 flats taken recently and 50 bias frames. ISO 800.

Mount: Skywatcher AZ-EQ6 with extension pillar.

Processing: The Lights and calibrations frames were processed using Deep Sky Stacker. I set the star detection thresholds to values that caught about 60 stars. The final images were stretched in RGB and I then balanced the histograms to retain white balance. Luminance was tweaked to show faint detail. I also used Gimp to add a selective Gaussian blur over a 5 pixel range to blend the RGB noise.