Less than an hour of exposure time between tree branches, and a target I'd like to revisit with a bigger gun
1 stack of 40 60s images, Canon 800D at ISO 800, Canon 400mm f5.6 lens at f6.3, iOptron Skyguider Pro tracker. 50 darks, 120 biases. Processed in PixInsight as below
***** Integration
lightvortexastronomy tutorial (
https://www.lightvortexastronomy.com/tutorial-pre-processing-calibrating-and-stacking-images-in-pixinsight.html)
* CC defect list + master dark (sigma = 8)
15*(1-(FWHM-FWHMMin)/(FWHMMax-FWHMMin))
+ 35*(1-(Eccentricity-EccentricityMin)/(EccentricityMax-EccentricityMin))
+ 20*(SNRWeight-SNRWeightMin)/(SNRWeightMax-SNRWeightMin)
+ 30
img 0889 ref
* ESD integration
* drizzle integration, circular kernel, area containing the galaxies
*****Linear processing
*** Initial
* Crop (rather serious, could have done with a teleconverter here)
* DBE tolerance 1, 5 samples per row
* CC using the background
*** Decon
* EZDecon, default settings
* star mask: processed star mask, cover up the big star, 3x boost 3x dilate 3x convolve
* background mask: autogenerated, stretched
* PS: autogenerated
*** Denoise
Using
https://jonrista.com/the-astrophotographers-guide/pixinsights/effective-noise-reduction-part-2/ as implemented by EZSuite.
* TGV edge protection 3e-5, MMT with mask blurred with 4 a trous layers and slightly darkened with curves
*** Extract luminance since nothing interesting happens here color-wise
***** Nonlinear processing
* EzSoftStretch
* Curves
* Unsharp mask 0.5
* TGV denoise, default settings TGV, MMT with curve-darkened mask
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