M16 Eagle Nebula

[akeru]

Hi all. Before a lot days of work finally I can enjoy my holidays in one of the most dark sky places in Spain, Teruel.
I took some pictures, one of them is this image of M16 (28x600" Canon EOS1000D and Newton 150/750)

This is a preliminary processing, and I would like know your opinions. I think that the nebula is fine but I'm not satisfied with the stars (white core in some of them) Do you have some tip for me? Thanks a lot

[admin]

Hi all. Before a lot days of work finally I can enjoy my holidays in one of the most dark sky places in Spain, Teruel.
I took some pictures, one of them is this image of M16 (28x600" Canon EOS1000D and Newton 150/750)

This is a preliminary processing, and I would like know your opinions. I think that the nebula is fine but I'm not satisfied with the stars (white core in some of them) Do you have some tip for me? Thanks a lot

Hi,

Some great detail in that - you got the complex in in all its glory!
Could you post your work flow (StarTools.log) for us?
My only niggle with the image is that it appears the green channel has been reduced a tad too much - one would expect a good continuum of red, orange, yellow, white and blue stars, but the lack of a green component has removed orange and yellow.

[akeru]

Thanks for your comments, Ivo.

This is the log:

File loaded [C:\Users\weerfm03\Desktop\pruebas\m16dssdrizzlex2.FTS].
---
--- Bin
Parameter [Scale] set to [(scale/noise reduction 50.00%)/(400.00%)/(+2.00 bits)]
--- Auto Develop
Parameter [Ignore Fine Detail <] set to [Off]
Parameter [Outside ROI Influence] set to [15 %]
--- Color
Parameter [Cap Green] set to [To Brown]
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 [Dark Saturation] set to [2.00]
Parameter [Bright Saturation] set to [Full]
Parameter [Saturation Amount] set to [200 %]
Parameter [Blue Bias Reduce] set to [1.00]
Parameter [Green Bias Reduce] set to [1.00]
Parameter [Red Bias Reduce] set to [1.02]
Parameter [Mask Fuzz] set to [1.0 pixels]
--- Contrast
Parameter [Expose Dark Areas] set to [No]
Parameter [Compensate Gamma] set to [No]
Parameter [Precision] set to [256 x 256 pixels]
Parameter [Dark Anomaly Filter] set to [1 pixels]
Parameter [Aggressiveness] set to [44 %]
Parameter [Dark Anomaly Headroom] set to [15 %]
--- Wavelet Sharpen
Parameter [Intelligent Enhance] set to [Yes]
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 [5.2 pixels]
Parameter [Amount] set to [232 %]
Parameter [Small Detail Bias] set to [88 %]
--- Deconvolution
Parameter [Image Type] set to [Deep Space]
Parameter [Mask Behavior] set to [De-ring Mask Gaps, Hide Result]
Parameter [Radius] set to [3.3 pixels]
Parameter [Iterations] set to [6]
Parameter [Regularization] set to [1.00 (optimal noise and detail)]
Parameter [Mask Fuzz] set to [8.0 pixels]
--- Lens
Parameter [UNKNOWN] set to [On]
Parameter [Curvature Red] set to [123.44 %]
Parameter [Curvature Blue] set to [123.44 %]
Parameter [Center X] set to [0 pixels]
Parameter [Center Y] set to [0 pixels]
Parameter [Red Shift X] set to [0.0 pixels]
Parameter [Red Shift Y] set to [0.0 pixels]
Parameter [Blue Shift X] set to [0.0 pixels]
Parameter [Blue Shift Y] set to [0.0 pixels]
Parameter [Curvature Linked] set to [123.44 %]
--- Fractal Flux
Parameter [Brightness Mask Mode] set to [Off]
Parameter [Algorithm] set to [Modulate Unsharp Mask]
Parameter [Negative Flux] set to [0 %]
Parameter [Positive Flux] set to [500 %]
Parameter [Detail Filter] set to [1.0 pixels]
Parameter [Filter Fuzz] set to [1.0 pixels]
Parameter [Filter Radius] set to [1.5 pixels]
Parameter [Filter Amount] set to [317 %]
Parameter [Mask Fuzz] set to [1.0 pixels]
Parameter [Brightness Mask Power] set to [1.00]
--- Wavelet De-Noise
Parameter [Scale 1] set to [90 %]
Parameter [Scale 2] set to [90 %]
Parameter [Scale 3] set to [90 %]
Parameter [Scale 4] set to [90 %]
Parameter [Scale 5] set to [76 %]
Parameter [Mask Fuzz] set to [1.0 pixels]
Parameter [Scale Correlation] set to [3]
Parameter [Color Detail Loss] set to [12 %]
Parameter [Brightness Detail Loss] set to [12 %]
Parameter [Redistribution Kernel] set to [4.5 pixels]
Parameter [Read Noise Compensation] set to [Off]
Parameter [Smoothness] set to [75 %]
--- Contrast
Parameter [Expose Dark Areas] set to [No]
Parameter [Compensate Gamma] set to [No]
Parameter [Precision] set to [256 x 256 pixels]
Parameter [Dark Anomaly Filter] set to [1 pixels]
Parameter [Aggressiveness] set to [37 %]
Parameter [Dark Anomaly Headroom] set to [15 %]
--- Magic
Parameter [Mode] set to [Shrink]
Parameter [Mask Grow] set to [1 pixels]
Parameter [Iterations] set to [1 pixels]
--- Color
Parameter [Cap Green] set to [To Brown]
Parameter [Bias Slider Mode] set to [Sliders Increase Color Bias]
Parameter [Style] set to [Scientific (Color Constancy)]
Parameter [LRGB Method Emulation] set to [Straight CIELab Luminance Retention]
Parameter [Dark Saturation] set to [9.90]
Parameter [Bright Saturation] set to [9.90]
Parameter [Saturation Amount] set to [152 %]
Parameter [Blue Bias Increase] set to [1.00]
Parameter [Green Bias Increase] set to [1.00]
Parameter [Red Bias Increase] set to [1.00]
Parameter [Mask Fuzz] set to [1.0 pixels]
File saved [C:\Users\weerfm03\Desktop\pruebas\m16dssdrizzlex2v3.tiff].

[admin]

Hi,

Looking at your wokflow, a few pointers;
Use the Color module as one of the last steps, not one of the first steps (see here why that is the case in StarTools).
Use the Wipe module as one of the first steps (after binning, cropping, etc.) to remove any color bias (which is not the same as color balancing!).
Use the Lens module as one of the first steps (after binning, before cropping) - since this necessarily crops the image, it may possibly be used in lieu of cropping away stacking artifacts.
Do as many operations as possible before switching Tracking off (e.g. Color and Contrast). Noise reduction and color reproduction will be better.

Hope this helps!