Equipment
- Samyang 135mm f/2
- QHY163M
- Baader narrowband filters
- Sky-Watcher Star Adventurer
- QHY5L-II-C and QHY 30mm guidescope
Acquisition (Total : 23.7h)
- Location : Backyard, bortle 5
- Ha : 62 x 300s + 102 x 180s + 63 x 90s (11.8h)
- OIII : 56 x 300s (4.7h)
- SII : 87 x 300s (7.2h)
- Calibration : darks, flats
Processing (PixInsight)
Linear (on Ha, OIII, and SII)
-
DynamicCrop
-
DynamicBackgroundExtraction
-
Deconvolution (Ha only)
-
Noise reduction (TGV and MMT)
-
HistogramTransformation
Color combination
-
Starnet++
-
R : OIII*SII + ~OIII*(.8*Ha+.2*SII)
-
G : Ha*(0.8*SII+0.2*OIII) + ~Ha*OIII
-
B : Ha*OIII + ~Ha*(0.2*SII+0.8*OIII)
Non-linear (creation of a luminance based on Ha)
- Starnet++
-
Sharpening (MMT)
-
LocalHistogramEqualization
-
CurvesTransformation
- PixelMath (adding the stars back)
Non-linear (creation of a luminance based on Ha)
- Starnet++
-
Sharpening (MMT)
-
LocalHistogramEqualization
-
CurvesTransformation
- PixelMath (adding the stars back)
Final adjustments
- BackgroundNeutralization
- LRGBCombination
- Star reduction (MorphologicalTransformation)
- Chrominance noise reduction (TGV)
- CurvesTransformation
Taken in April 2020