California Nebula Bi-Colour v2

23 x 480s of H-Alpha (ISO 200)

9 x 1200s of OIII (ISO 200)

20 x 90s of RGB stars (ISO 200)

2" mounted Baader filters

Shot from Crumlin, Northern Ireland.

 

Skywatcher 80ED with dedicated field flattener

Nikon D5300a

Skywatcher HEQ5-Pro mount

Guided with PHD2, a Finder-Guider and a Legacy QHY5 camera

 

Calibrated with 40 Flats and 200 Bias frames. Dithered aggressively every frame.

 

Captured with Sequence Generator Pro, stacked in Astro Pixel Processor, and post-processed in Photoshop.

 

Ha was assigned to Red, OIII to Blue, and the Green was synthesized using one of Noel Carboni's actions.

Done