astrophotography_andy
The Pac Man Nebula
CAPTURE INFO
-------------------
Scope Centering:
- RA: '0 54 16.931'"
- Dec: '+56 44 22.56'"
Date Captured:
October 31, Home (Bortle 7)
GUIDING NOTES:
Average, averaging ~0.7 RMS
EQUIPMENT
Optics: William Optics 61ii doublet refractor @ 368mm FL
William Optics adjustable field flattener
Camera: ZWO 533mc Pro (OSC) @ gain 390
Filters:
- 2" Optolong L-Enhance using filter drawer
Mount:
- iOptron GEM 28
Guiding:
- ZWO 120mm mini (red filter)
- William Optics 32mm f/3.75 UniGuide Guidescope
- ZWO ASI Air Pro
- Used previous calibration
- Dither: 5 pixels, every 2 frames
Acquisition:
- ZWO ASI Air Pro (Plan Mode)
IMAGE CALIBRATION (PixInsight)
Weighted Batch Preprocessing
- Lights, Darks, Flat Darks, Bias
- Cosmetic Correction
- Stats
- (73) 180 second subs
- Normalize Scale Gradient Script to nomalize background
NON LINEAR PROCESSING (PixInsight)
1. Dynamic Background Extraction
2. Background Neutralization
3. Color Calibration
3. Linear Noise Reduction using MultiscaleLinearTransform
4. Another Linear Noise Reduction using MultiscaleLinearTransform
LINEAR PROCESSING (PixInsight)
1. Easy Soft Stretch script
2. SCNR on the G channel
3. Removed the stars with Starnet
4. Created Range mask to hide the nebula
5. Used HistogramTransformation to darken the star halos.
6. Ran HDRMultiscaleLinearTransform to enhance nebula
7. Ran a slight "S" curve using CurvesTransformation to darken background and enhance nebula
8. LocalHistogramEqualization @ 25 for contrast on nebula
9. LocalHistogramEqualization @ 25 to further contrast nebula
10. MultiscaleLinearTransform to sharpen detail in the nebula
11. Added back the stars with 15% reduction using PixelMath
12. Created Star Mask and inverted to protect the stars
13. Increased saturation of the stars using Curves
14. Inverting the star mask back to protect stars and increased blue in the nebula using curves
15. Made image ready for the web using ICCProfileTransformation
The Pac Man Nebula
CAPTURE INFO
-------------------
Scope Centering:
- RA: '0 54 16.931'"
- Dec: '+56 44 22.56'"
Date Captured:
October 31, Home (Bortle 7)
GUIDING NOTES:
Average, averaging ~0.7 RMS
EQUIPMENT
Optics: William Optics 61ii doublet refractor @ 368mm FL
William Optics adjustable field flattener
Camera: ZWO 533mc Pro (OSC) @ gain 390
Filters:
- 2" Optolong L-Enhance using filter drawer
Mount:
- iOptron GEM 28
Guiding:
- ZWO 120mm mini (red filter)
- William Optics 32mm f/3.75 UniGuide Guidescope
- ZWO ASI Air Pro
- Used previous calibration
- Dither: 5 pixels, every 2 frames
Acquisition:
- ZWO ASI Air Pro (Plan Mode)
IMAGE CALIBRATION (PixInsight)
Weighted Batch Preprocessing
- Lights, Darks, Flat Darks, Bias
- Cosmetic Correction
- Stats
- (73) 180 second subs
- Normalize Scale Gradient Script to nomalize background
NON LINEAR PROCESSING (PixInsight)
1. Dynamic Background Extraction
2. Background Neutralization
3. Color Calibration
3. Linear Noise Reduction using MultiscaleLinearTransform
4. Another Linear Noise Reduction using MultiscaleLinearTransform
LINEAR PROCESSING (PixInsight)
1. Easy Soft Stretch script
2. SCNR on the G channel
3. Removed the stars with Starnet
4. Created Range mask to hide the nebula
5. Used HistogramTransformation to darken the star halos.
6. Ran HDRMultiscaleLinearTransform to enhance nebula
7. Ran a slight "S" curve using CurvesTransformation to darken background and enhance nebula
8. LocalHistogramEqualization @ 25 for contrast on nebula
9. LocalHistogramEqualization @ 25 to further contrast nebula
10. MultiscaleLinearTransform to sharpen detail in the nebula
11. Added back the stars with 15% reduction using PixelMath
12. Created Star Mask and inverted to protect the stars
13. Increased saturation of the stars using Curves
14. Inverting the star mask back to protect stars and increased blue in the nebula using curves
15. Made image ready for the web using ICCProfileTransformation