Acquired using two external dualband filters (Ha-OIII and SII-OIII) with my Seestar S50 in december-january. I would have liked to increase the acquisition time, but the weather is not helping…
Equipment and data acquisition:
– Seestar S50, EQ mode, 20 and 30 sec subs
– Askar C1/C2 filters with a 3D-printed filter holder
– Roughly 4 hours of acquisition per filter from Bortle 4/Bortle 7 locations
Processing (PI)
– WBPP for each filter set
– Graxpert, BlurX (correction only) on each stack
– Star alignment of the two stacks and dynamic crop. StarX on both stacks
– Starless images: channel separation go obtain master Ha and master SII; pixelmath to combine G and B from both stacks to give master OIII
– For each Ha, SII and OIII master, SetiAstro statistical stretch, then manual curves transformation. NoiseX.
– SetiAstro Perfect Palette picker (SHO)
– SCNR
– Curves transformation with various range and color masks; HDR multiscale transform.
– Stars: combined both stacks, SetiAstro Star stretch, reduced saturation l. Added spikes with SetiAstro Suite
– Star recombination in Siril , retouches with curves transformation and in LightRoom
by Techno-Scientist