M83 - The Southern Pinwheel Galaxy (reprocessed) (live.staticflickr.com)

submitted 8 months ago by lefty7283@lemmy.world to c/astrophotography@lemmy.world

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[-] lefty7283@lemmy.world 2 points 8 months ago

Continuing to reprocess old data since I've realized my processing skills were shit back when I originally shot this galaxy in 2019. I'm a lot happier with the more natural colors and better noise reduction on this one. Captured on April 22nd and 23rd, 2019 from a bortle 7 zone.

Places where I host my other images:

Flickr | Instagram |

Equipment:

TPO 6" F/4 Imaging Newtonian
Orion Sirius EQ-G
ZWO ASI1600MM-Pro
Skywatcher Quattro Coma Corrector
ZWO EFW 8x1.25"/31mm
Astronomik LRGB+CLS Filters- 31mm
Astrodon 31mm Ha 5nm, Oiii 3nm, Sii 5nm
Agena 50mm Deluxe Straight-Through Guide Scope
ZWO ASI-290mc for guiding
Moonlite Autofocuser

Acquisition: 2 hour 47 minutes (Camera at Unity Gain, -20°C)

CLS- 52x120"
Red- 21x60"
Green- 21x60"
Blue- 21x60"
Darks- 30
Flats- 30 per filter

Capture Software:

Captured using N.I.N.A. and PHD2 for guiding and dithering.

PixInsight Processing:

BatchPreProcessing
SubframeSelector
StarAlignment
Blink
ImageIntegration

Linear:

DynamicCrop
DynamicBackgroundExtraction 2x

duplicated each image and removed stars via StarXterminator. Ran DBE with a shitload of points to generate background model. model subtracted from original pic using the following PixelMath (math courtesy of /u/jimmythechicken1)

$T * med(model) / model

Luminance Linear:

BlurXTerminator
ArcsinhStretch + HT to stretch nonlinear

RGB Linear:

ChannelCombination to combine monochrome Red Green and Blue stacks into color RGB image
SpectroPhotometricColorCalibration
BlurXTerminator
DeepSNR
HSV Repair
ArcsinhStretch + HT to stretch nonlinear

NonLinear:

LRGBCombination to add stretched L as a luminance layer to RGB
Several Curve transformations to adjust lightness, contrast, saturation, hues, etc with various masks
DeepSNR again
MLT for large scale chrominance noise reduction
More Curves
Invert > SCNR green > Invert to remove some magentas from stars
LocalHistogramEqualization
even more curves
DynamicCrop
Annotation

[-] bigbadmoose@lemmy.world 2 points 8 months ago

Hell of a shot

this post was submitted on 23 Jan 2024

24 points (100.0% liked)

Astrophotography

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