Subject: Rosette Nebula (Caldwell 49)
Date: 02/25/2021, 03/01/2021, 03/03/2021
Telescope: Orion 6" f4 Newtonian Astrograph
Camera: ASI2600MC, -15C, Gain 100, Offset 50
Guiding: Orion SSAG+Orion Mini 50 mm
Filter: Optolong L-enhance, None
Mount: Skywatcher EQ6r-pro
Acquisition SW: N.I.N.A
Processing SW: Pixinsight, Photoshop, Topaz DeNoise AI, Topaz Sharpen AI
Subframes: 74x300s L-enhance under varying moon conditions. Red channel was fine, green and blue channels had very noticeable gradient with somewhat circular edge, not good. Maybe I should get an L-extreme or something. Red channel -> Ha narrowband.
63x180s unfiltered for RGB before the moon came up last night
Pixinsight steps: WeightBatchPreprocessing both files same register image, Bayer drizzle 1x integration. DynamicCrop, DynamicBackgroundExtraction each. Extract red channel from L-enhance, redefine to Ha. EZDecon, EZDenoise both. HistrogramTransform both, CurvesTransform. NBRGBCombination script for HaRGB image. CurvesTransform, EZStarReduction and out.
Photoshop steps: Exposure, contrast, color enhancement.
TopazDeNoise -> one file
TopazSharpen -> second file (Note: This is great for the nebular areas, but oversharpens the stars, so...
Starnet++ mask generation
In Photoshop, mask off stars from sharpened file. Merge layers.
More Photoshop tweaks, back to Pixinsight for DarkStructureEnhance because I found out I wanted a little more oomph there.
I really like how this turned out.
Edited by RFtinkerer, 04 March 2021 - 03:31 PM.