The Iris in a field of dust

Equipment

  • Samyang 135mm f/2
  • Canon EOS 750D
  • Sky-Watcher Star Adventurer

Acquisition

  • Location : Backyard, bortle 5
  • Integration time : 652 x 60s (10h52)
  • Calibration : bias, flats

Processing (PixInsight)

Linear

  • Crop

  • DBE

  • BackgroundNeutralization and ColorCalibration

  • Noise reduction (TGV and MMT)

  • HSV Repair

  • Extract synthetic luminance

Luminance

  • MaskedStretch

  • Starnet++

  • Curves

  • MLT (sharpening)

  • HDRMultiscaleTransform

  • LocalHistogramEqualization

  • PixelMath – adding the stars back

RGB

  • MaskedStretch (note : I usually do ArcsinhStretch but this time I had too much chrominance noise)

  • SCNR Green 70%

  • Invert > SCNR Green 100% > Invert (fixing magenta stars)

Final adjustments

  • LRGBCombination

  • MorphologicalTransformation (contours mask made using Starnet, Binarize, Convolution and PixelMath)

  • ColorSaturation

  • Curves

Taken in October 2019

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