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Imaging telescopes or lenses: SharpStar Askar 400/F5.6
Imaging cameras: ZWO ASI1600mm-Pro ZWO ASI 1600MM cool Pro
Mounts: Ioptron CEM60-EC
Guiding telescopes or lenses: William Optics 50mm Guidescope rotolock William Optics 50mm F/4 Guide Scope
Guiding cameras: Zwo asi 120 mini
Focal reducers: Sharpstar RED 0.7 ASKAR
Software: NINA - Nighttime Imaging ‘N’ Astronomy · PHD2 Guiding 2.6.9 · pixinsight · photoshop cs6
Filters: Baader HA 7nm 2" · Baader OIII 8.5 nm 2" · Baader SII 8nm 2"
Dates:Sept. 21, 2020
Frames: 270x300"
Integration: 22.5 hours
Avg. Moon age: 4.63 days
Avg. Moon phase: 22.36%
Astrometry.net job: 3935089
RA center: 20h 15' 33"
DEC center: +38° 43' 15"
Pixel scale: 2.785 arcsec/pixel
Orientation: 359.699 degrees
Field radius: 2.134 degrees
Resolution: 4452x3262
Locations: home sweet home, pontaubert, Bourgogne, Yonne, France
Data source: Backyard
Voici la version SHO de la Ngc 6888, la nébuleuse du croissant et de la bulle. (Discrète mais elle est là).
J’ai pu faire ma couche S entre 2 nuits nuageuses même si un léger voile était présent.
Concernant le mixage, la couleur du croissant ne me plaisait pas comme c’est souvent le cas en SHO sur les rémanents. (M1 par exemple qui est assez spécial en SHO)
J’ai donc fait un masque uniquement de la nébuleuse avec un mélange de game, rangemask et pixelmath pour intégrer le rangemask. (Sur pixinsight).
Ensuite, pixelmath avec une formule différente pour avoir le jaune tout en conservant le bleu de la coquille;
R->H
G->H+Ox0,1
B->O
Ajustement des courbes avec Photoshop et curves
Puis je l’ai collé avec ce masque.
J’ai donc opté pour une couleur jaune qui est plus en adéquation avec les couleurs de l’image et mon mixage de base tout en essayant de conserver la bulle bleue qui entoure cette nébuleuse.
Concernant les exifs:
•Askar FRA400 avec réducteur de focale •0,7 (focale de 280mm)
•Monture Ioptron CEM60EC
•Zwo asi 1600 mmpro
S2:60x300sec
Ha:120x300sec
O3:90x300sec
J’ai fait un wetransfer avec les masters SHO pour ceux qui veulent s’essayer au traitement. Envoyez moi juste un message et je vous le transfère. (Valable 1 semaine). C’est tjs sympa de voir d’autres versions). 😊
———————————————————-
Here is the SHO version of Ngc 6888, the crescent and bubble nebula. (Discreet but it is there).
I was able to do my S layer between 2 cloudy nights even though a light haze was present.
Regarding the mix, I didn't like the color of the crescent nebula, as is often the case in SHO on slash. (M1 for example which is quite special in SHO)
So I made a mask only on nebula with a mix of game, rangemask and pixelmath to integrate the rangemask. (On pixinsight).
Then, pixelmath with a different formula to have the yellow while keeping the blue of the shell;
R-> H
G-> H + Ox0,1
B-> O
Adjusting curves with Photoshop and curves
Then I stuck it with this mask.
So I opted for a yellow color which is more in line with the colors of the image and my original mix while trying to keep the blue shell that surrounds this nebula.
Regarding the exifs:
• Askar FRA400 with focal reducer • 0.7 (280mm focal length)
• Ioptron CEM60EC mount
• Zwo asi 1600 mmpro
S2: 60x300sec
Ha: 120x300sec
O3: 90x300sec
I did a wetransfer with the SHO masters for those who want to try their hand at treatment. Just send me a message and I'll forward it to you. (Valid for 1 week). It's always nice to see other versions). 😊
Description: Crop
Uploaded: ...
Description: Bonne orientation
Uploaded: ...
Description: nouveau traitement
Uploaded: ...
ZWO ASI1600MM/QHY163M |
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