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m57 (ring planetary nebula) HaLsRGB, 



    
        

            *philippe Gilberton

m57 (ring planetary nebula) HaLsRGB

Imaging telescopes or lenses: Celestron C8 Celestar

Imaging cameras: ZWO ASI290MC  ·  ZWO ASI 1600MM Cooled Pro  ·  zwo ASI 174 MM-C

Mounts: Sky-Watcher skywatcher AZ-EQ5 PRO

Guiding telescopes or lenses: Pentax 300 mm f/4.0

Guiding cameras: zwo ASI 120 MMs

Software: SharpCap Pro 3.2  ·  Adobe photoshop cs6  ·  Siril 0.9.10  ·  PHD2 PHD 2.6.5  ·  DeepSkyStacker 4.1.1

Filters: Astronomik Halpha - 12 nm  ·  ZWO LRGB Filter-Set 1.25"

Accessory: zwo filter wheel 1.25", 5 slot, manual


Dates:July 8, 2018June 2, 2019June 17, 2019June 22, 2019July 11, 2020

Frames:
11x300" (gain: 139.00) -25C bin 1x1
5400x1" (gain: 300.00) bin 1x1
Astronomik Ha 1.25" 12nm: 60x60" (gain: 139.00) -27C bin 1x1
ZWO LRGB Filter-Set 1.25": 40x60" (gain: 180.00) -20C bin 1x1

Integration: 4.1 hours

Avg. Moon age: 21.64 days

Avg. Moon phase: 53.75%

Bortle Dark-Sky Scale: 4.00


Basic astrometry details

Astrometry.net job: 2760958


Resolution: 1222x688

Locations: backyard, Gévezé, Bretagne, Ille et Vilaine, France

Data source: Backyard

Description

Comparison of benefit of using lucky imaging versus long exposure with the same optical instrument.
long exposure performed with ASI174MM-cooled for RGB channels with C8 + focal reducer
long exposure in Halpha with my new acquisition ASI1600MM-cooled pro with C8 + focal reducer
lucky imaging with my new ASI290MC and C8 (no focal reducer and no guiding)
I did first a L synthetic/Ha + HaRGB (long exposure)
I replaced the L channel with lucky imaging one and added the previous captured Ha
The resolution is amazingly improved. For the purpose of the comparison I cropped the long exposure to fit it with the smaller size sensor of the ASI290MC
Finally I added 1 hour of Halpha captured in July 2020.

Comments

Author

philippe_gilberton
*philippe Gilberton
License: None (All rights reserved)
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Revisions

  • m57 (ring planetary nebula) HaLsRGB, 



    
        

            *philippe Gilberton
    Original
  • m57 (ring planetary nebula) HaLsRGB, 



    
        

            *philippe Gilberton
    C
  • m57 (ring planetary nebula) HaLsRGB, 



    
        

            *philippe Gilberton
    E
  • Final
    m57 (ring planetary nebula) HaLsRGB, 



    
        

            *philippe Gilberton
    F

C

Description: add the lucky imaging layer to see the full benefit of using it as a synthetic luminance layer

E

Description: 1 heure Ha added

F

Description: enhanced stars

Sky plot

Sky plot

Histogram

m57 (ring planetary nebula) HaLsRGB, 



    
        

            *philippe Gilberton