Hi Ivo,
I am using a ASI533MC Pro OSC. I started out with an IDAS LPS-D3 which is a multi-bandpass filter:
The filter is recommended for broadband targets, but I wanted to see how it performs with
the crescent nebula, NGC 6888. Again, my goal is to suppress suburban LP. The imaging characteristics are
as follows:
40 darks: -10C, gain 105, offset 10, 60 sec
40 bias: -10C, gain 105, offset 10, 0.000032 sec
40 flats: -10C, gain 105, offset 10, white balance settings at 50/50 = off, 0.1 sec
(LED tracing panel set on top of stretched white T-shirt)
124 lights: -10C, gain 105, offset 10, white balance settings at 50/50 = off, 60 sec
acquired with William Optics GT71 APO + WO PFlatA6iii FR/FF, HEQ5 mount, ZWO OAG + ASI120mm-mini guide cam
IDAS LPS-D3 filter in Altair Astro filter drawer placed between ASI533MC Pro and OAG. KStars/Ekos for tracking/focus/capture.
Guiding was generally below 0.8 RMS with an abort capture set at 1.0 RMS.
Not a great night for capturing data: some periodic high level thin clouds etc. I culled visually the worst and then had
ASTAP do an evaluation to cull more. Dithering done between every light capture.
Siril for calibration/registration/stacking. Flats calibrated with bias frames. Lights calibrated with darks and calibrated flats,
no normalization in final light stacking. Master calibration dark and flat frames are not Bayered. Calibrated lights are debayered
prior to registration and stacking. I do not use any image processing functions, color balancing or gradient removal etc. in Siril.
When I open as "Linear" and AutoDev, I have a bright yellow/orange image. If I use "Linear from OSC ... " it appears in grayscale.
Should I always open my debayered stacked .fit files from Siril with "Linear from OSC ... " ?
Up til now all of my StarTools processing has been with OSC of broadband targets, so nebula processing is a new challenge
especially with the dense star field that surrounds NGC 6888.
Here is my processing log:
Code: Select all
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StarTools 1.7.457
Wed Jun 2 13:15:03 2021
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File loaded [r_pp_ngc6888_IDAS_stacked_GESDT.fit].
Image size is 3008 x 3008
---
Type of Data: Linear, was not Bayered, or was Bayered + white balanced
--- Auto Develop
Parameter [Ignore Fine Detail <] set to [Off]
Parameter [Outside RoI Influence] set to [15 %]
Parameter [RoI X1] set to [0 pixels]
Parameter [RoI Y1] set to [0 pixels]
Parameter [RoI X2] set to [3008 pixels (-0)]
Parameter [RoI Y2] set to [3008 pixels (-0)]
Parameter [Detector Gamma] set to [1.00]
Parameter [Shadow Linearity] set to [50 %]
--- Bin
Parameter [Scale] set to [scale 70.71% / +1.00 bits / +1.00x SNR improvement]
Image size is 2126 x 2126
--- Crop
Parameter [X1] set to [100 pixels]
Parameter [Y1] set to [100 pixels]
Parameter [X2] set to [2026 pixels (-100)]
Parameter [Y2] set to [2026 pixels (-100)]
Image size is 1926 x 1926
--- Wipe
Parameter [Synthetic Dark/Bias] set to [Off]
Parameter [Gradient Edge Behavior] set to [Absorb 50%]
Parameter [Synthetic Flats] set to [Off]
Parameter [Sampling Precision] set to [256 x 256 pixels]
Parameter [Dark Anomaly Filter] set to [1 pixels]
Parameter [Gradient Falloff] set to [0 %]
Parameter [Synth. Bias Edge Area] set to [100 %]
Parameter [Gradient Aggressiveness] set to [75 %]
Redoing stretch of linear data
--- Auto Develop
Parameter [Ignore Fine Detail <] set to [2.1 pixels]
Parameter [Outside RoI Influence] set to [15 %]
Parameter [RoI X1] set to [842 pixels]
Parameter [RoI Y1] set to [857 pixels]
Parameter [RoI X2] set to [1058 pixels (-868)]
Parameter [RoI Y2] set to [1053 pixels (-873)]
Parameter [Detector Gamma] set to [1.00]
Parameter [Shadow Linearity] set to [50 %]
--- Contrast
Parameter [Expose Dark Areas] set to [Yes]
Parameter [Brightness Retention] set to [Off]
Parameter [Precision] set to [256 x 256 pixels]
Parameter [Shadow Detail Size] set to [10 pixels]
Parameter [Locality] set to [50 %]
Parameter [Shadow Dyn Range Alloc] set to [50 %]
--- HDR
Parameter [Small Detail Precision] set to [Max]
Parameter [Channels] set to [Brightness Only]
Parameter [Algorithm] set to [Reveal DSO Core]
Parameter [Dark/Bright Response] set to [Full]
Parameter [Detail Size Range] set to [207 pixels]
Parameter [Strength] set to [1.2]
--- Wavelet Sharpen
Parameter [Structure Size] set to [Large]
Mask used (BASE64 PNG encoded)
--- SNR-aware Wavelet Sharpening
Parameter [Scale 1] set to [100 %]
Parameter [Scale 2] set to [100 %]
Parameter [Scale 3] set to [100 %]
Parameter [Scale 4] set to [100 %]
Parameter [Scale 5] set to [100 %]
Parameter [Mask Fuzz] set to [4 pixels]
Parameter [Amount] set to [300 %]
Parameter [High SNR Size Bias] set to [85 %]
Parameter [Low SNR Size Bias] set to [0 %]
Parameter [Dark/Light Enhance] set to [50% / 50%]
Mask used (BASE64 PNG encoded)
--- Deconvolution
Parameter [Image Type] set to [Deep Space]
Parameter [Secondary PSF] set to [Dynamic Star Sample Small x Primary]
Parameter [Primary PSF] set to [Moffat Beta=4.765 (Trujillo)]
Parameter [Primary Radius] set to [1.5 pixels]
Parameter [Iterations] set to [11]
Parameter [Error Diffusion] set to [18 %]
Parameter [Mask Fuzz] set to [8.0 pixels]
Parameter [Deringing] set to [50 %]
Mask used (BASE64 PNG encoded)
Mask used (BASE64 PNG encoded)
--- Color
Parameter [Bias Slider Mode] set to [Sliders Reduce Color Bias]
Parameter [Style] set to [Scientific (Color Constancy)]
Parameter [LRGB Method Emulation] set to [Straight CIELab Luminance Retention]
Parameter [Matrix] set to [Identity (OFF)]
Parameter [Dark Saturation] set to [2.5]
Parameter [Bright Saturation] set to [Full]
Parameter [Saturation Amount] set to [243 %]
Parameter [Blue Bias Reduce] set to [1.25]
Parameter [Green Bias Reduce] set to [1.03]
Parameter [Red Bias Reduce] set to [1.72]
Parameter [Mask Fuzz] set to [1.0 pixels]
Parameter [Cap Green] set to [100 %]
Parameter [Highlight Repair] set to [Off]
--- Super Structure
Parameter [Detail Preservation] set to [Linear Brightness Mask]
Parameter [Compositing Algorithm] set to [Multiply, Gamma Correct]
Parameter [Brightness, Color] set to [Only Brightness]
Parameter [Brightness Retention] set to [Off]
Parameter [Mask Fuzz] set to [1.0 pixels]
Parameter [Airy Disk Radius] set to [50 %]
Parameter [Gamma] set to [0.50]
Parameter [Detail Preservation Radius] set to [20.0 pixels]
Parameter [Saturation] set to [100 %]
Parameter [Strength] set to [100 %]
--- Unified De-Noise
Parameter [Grain Size] set to [3.5 pixels]
Parameter [Walking Noise Size] set to [1.0 pixels]
Parameter [Walking Noise Angle] set to [0]
--- Unified De-Noise
Parameter [Scale 1] set to [95 %]
Parameter [Scale 2] set to [95 %]
Parameter [Scale 3] set to [95 %]
Parameter [Scale 4] set to [95 %]
Parameter [Scale 5] set to [50 %]
Parameter [Grain Equalization] set to [0 %]
Parameter [Scale Correlation] set to [23 %]
Parameter [Color Detail Loss] set to [50 %]
Parameter [Brightness Detail Loss] set to [50 %]
Parameter [Grain Dispersion] set to [3.5 pixels]