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Contains:  M 31, Great Nebula in Andromeda, NGC 224, M 32, NGC 221, M 110, NGC 205, The star νAnd
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M31 LRGB with ASI183MM/Samyang 135, 





    
        

            Ben
M31 LRGB with ASI183MM/Samyang 135

M31 LRGB with ASI183MM/Samyang 135

Technical card

Resolution: 2364x1680

Dates:Sept. 29, 2019Oct. 4, 2019

Frames:
Baader B 1.25'' Filter: 23x180" (gain: 53.00) -15C
Baader G 1.25'' Filter: 22x180" (gain: 53.00) -15C
Baader R 1.25'' Filter: 11x180" (gain: 53.00) -15C
Baader UV/IR Cut: 170x30" ISO115 (gain: 10.00) -15C

Integration: 4.2 hours

Darks: ~40

Flats: ~40

Flat darks: ~40

Avg. Moon age: 3.54 days

Avg. Moon phase: 19.31%

Bortle Dark-Sky Scale: 6.00

Astrometry.net job: 3002047

RA center: 10.710 degrees

DEC center: 41.266 degrees

Pixel scale: 3.817 arcsec/pixel

Orientation: 28.554 degrees

Field radius: 1.537 degrees

Locations: Backyard, Saint-Orens de Gameville, France

Data source: Backyard

Description

- Super luminance created from stack of R, G, B and L. This gave a luminance with higher SNR.
Then super luminance and pseudo luminance from RGB have been merged together (70%-30%).

- Lens opened at f/2.8.

- This looks less sharp than the RGB only version :
RGB only version

Is shooting L with Samyang 135 worth or not ? Still an open question for me.

Comments

Author

netspoon
Ben
License: None (All rights reserved)
1921
Like

Revisions

  • M31 LRGB with ASI183MM/Samyang 135, 





    
        

            Ben
    Original
  • M31 LRGB with ASI183MM/Samyang 135, 





    
        

            Ben
    B
  • M31 LRGB with ASI183MM/Samyang 135, 





    
        

            Ben
    C
  • Final
    M31 LRGB with ASI183MM/Samyang 135, 





    
        

            Ben
    D

B

Used starless version of super luminance + stars from RGB_lum to get more sharpness

C

+ star reducing

D

flip

Sky plot

Sky plot

Histogram

M31 LRGB with ASI183MM/Samyang 135, 





    
        

            Ben

In these public groups

Samyang 135 f/2