My first narrowband on a new-to-me mono camera. This was my introduction into NINA as well. More complex and lots of fun getting everything working well together.
Camera: ZWO ASI1600mm
Telescope: Skywatcher 150p Quattro with 0.9x corrector
Filter: Astronomik 36mm SHO filters (6mm)
Clarity: Good
Sky: Bortle 7
Temperature: 2C outside, -10C camera
Mount: Skywatcher Al-eq55i
Exposure: night 1 (8x 180s Sii, 8x 180s Ha, 8x 180s Oiii), night 2 (15x 180s Sii, 15x 60s Ha, 15x 180s Oiii)… Still figuring it out 😊
Gain: 139, gain offset 55
Calibrations: 100 bias, 30Â flats, 20 darks
Processing: Sirilic, GraXpert: RBF background and denoise of individual channels, Siril: individual stretching of each channel, mapping and combination as Hubble palette, remove stars, used color calibration only on the background space (I wanted to even the black with the histogram but this worked too), more stretching, recombine with stars from the beginning stack and not after individual stretching of the channels (they looked nicer), desaturation of the cyan channel, A little more saturation on the yellow.
by render_reason