Crescent Nebula - NGC 6888

Reprocess time ! (cloudy here :S )

This data come from a session earlier this year , march 2021

I not 100% satisfied with the way it turned , but still nice

picture :D

 

Feel free to ask a question and all criticism are welcome 👍

 

-Equipment-

Scope: TS-Optics 94/414 EPDH (414mm focal)

Camera: ZWO ASI533MC Pro at -15°C

Guiding: ZWO OAG

Guiding camera: ZWO ASI 120MM

Mount: Skywatcher EQ5

Filter: Optrolong L-eXtreme

 

-Acquisition-

Light :50x300s ( 4h ) at Gain:101 Offset:49

Dark-100x300s Flat-30 Bias-100

Date : Take on 3 night 03-04-05 mars 2021

Location : France-Alsace Bortle 4/5

 

-Software-

Carte du Ciel, N.I.N.A, Phd2 , PoleMaster and PixInsight , Lightroom

 

-Pre Processing in PixInsight-

Image Calibration

Cosmetic Correction

Debayer

Subframe Selector

Star Alignement

Local Normalization

Drizzle x2

 

Crop the black bands from the stacking

 

-Processing

 

RGB layer

Split RGB channels

Ha=R Oiii= B*0.3+G*0.7

EZ_Soft Stretch

HOO combination with Foraxx formula

R=Ha

G=((Oiii*Ha)^~(Oiii*Ha))*Ha + ~((Oiii*Ha)^~(Oiii*Ha))*Oiii

B=Oiii

Starnet++ for remove stars and build a mask nebula

Color Saturation

Curves Tansformation (K,saturation,hue)

Bring back the stars

 

L layer

Ez_Deconvolution

Ez_Denoise

Ez_Soft Stretch

Local Histogram Equalization with nebula mask

 

LRGB

Final Curve Transformation

EZ_Star Reduction

 

Lightroom

Vibrance, clarity , TSL

Save as JPEG

 

Clear skies !

Done