Cookie consent

AstroBin saves small pieces of text information (cookies) on your device in order to deliver better content and for statistical purposes. You can disable the usage of cookies by changing the settings of your browser. By browsing AstroBin without changing the browser settings, you grant us permission to store that information on your device.

I agree
Contains:  NGC 2252, NGC 2244, Rosette nebula, NGC 2239, The star 12Mon
Getting plate-solving status, please wait...
Rosette nebula experiments : ASI224MC + Samyang 135mm, 





    
        

            Ben

Rosette nebula experiments : ASI224MC + Samyang 135mm

Technical card

Resolution: 1196x906

Dates:Feb. 3, 2019Feb. 4, 2019

Frames:
Baader f/2 Highspeed 1.25" H-Alpha Filter: 74x30" (gain: 300.00) bin 1x1
Baader f/2 Highspeed 1.25" OIII Filter: 50x30" (gain: 300.00) bin 1x1
Baader f/2 Highspeed 1.25" SII Filter: 10x30" (gain: 300.00) bin 1x1

Integration: 1.1 hours

Darks: ~32

Bias: ~32

Avg. Moon age: 28.75 days

Avg. Moon phase: 0.91%

Bortle Dark-Sky Scale: 6.00

Astrometry.net job: 2513565

Locations: Backyard, Saint-Orens de Gameville, France

Data source: Backyard

Description

First pic with ASI224MC + Samyang 135mm

- ASI224MC is really nice. The amp glow can be greatly reduced with darks.
- ASI224 image is only 1300 pixels large. Ha extracted from red channel is about 650 pixels large. I drizzled the 3 bands to get 1300 back. Mono camera needed :p
- guiding would be nice for this setup (work in progress)
- a few Sii only (clouds came)

I made 4 different band blending and I applied the same processing for each pic.

Original) stacked Ha

B) stacked Oiii

C) stacked Sii

D) SHO
R = Sii
G = Ha
B = Oiii

E) HOS
R = Ha
G = Oiii
B = Sii

F) HOO alternative
R = 0.76 * Ha + 0.24 * Sii
G = Oiii
B = 0.85 * Oiii + 0.15 * Ha

G) HOO "classic"
R = Ha
G = 0.65 * Oiii + 0.35 * Ha
B = 0.8 * Oiii + 0.3 * Ha

Final) Reprocessed without Sii (too weak) and a bit sharper :
R = Ha
G = 0.9 Ha + 0.1 Oiii
B = Oiii

Comments

Author

netspoon
Ben
License: None (All rights reserved)
2200
Like

Revisions

  • Rosette nebula experiments : ASI224MC + Samyang 135mm, 





    
        

            Ben
    Original
  • Rosette nebula experiments : ASI224MC + Samyang 135mm, 





    
        

            Ben
    B
  • Rosette nebula experiments : ASI224MC + Samyang 135mm, 





    
        

            Ben
    C
  • Rosette nebula experiments : ASI224MC + Samyang 135mm, 





    
        

            Ben
    D
  • Rosette nebula experiments : ASI224MC + Samyang 135mm, 





    
        

            Ben
    E
  • Rosette nebula experiments : ASI224MC + Samyang 135mm, 





    
        

            Ben
    F
  • Rosette nebula experiments : ASI224MC + Samyang 135mm, 





    
        

            Ben
    G
  • Rosette nebula experiments : ASI224MC + Samyang 135mm, 





    
        

            Ben
    H
  • Final
    Rosette nebula experiments : ASI224MC + Samyang 135mm, 





    
        

            Ben
    I

I

Reprocessed

Histogram

Rosette nebula experiments : ASI224MC + Samyang 135mm, 





    
        

            Ben

In these public groups

Samyang 135 f/2