Contains:  M 82, NGC 3034, M 81, Bode's nebulae, NGC 3031, The star 27UMa, The star 24UMa, The star 22UMa
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M81 group of galaxies and interstellar flux nebula, 





    
        

            tommy_nawratil
M81 group of galaxies and interstellar flux nebula

M81 group of galaxies and interstellar flux nebula

Technical card

Imaging telescope or lens:Sigma 180 mm F2,8 EX APO Macro OS HSM

Imaging camera:Canon Eos 600da

Mount:HEQ5 Pro

Guiding telescope or lens:Skywatcher 9x50 finder

Guiding camera:Lacerta MGEN

Software:Pleiades Astrophoto, S.L. Pix InsightPhotoshop

Filter:IDAS LPS-D1

Resolution: 3380x2225

Dates:April 16, 2015

Frames: 420x180"

Integration: 21.0 hours

Avg. Moon age: 26.91 days

Avg. Moon phase: 7.55%

Astrometry.net job: 637984

RA center: 149.042 degrees

DEC center: 69.348 degrees

Orientation: -88.601 degrees

Field radius: 4.342 degrees

Locations: my lovely garden, near Vienna, Austria

Data source: Unknown

Description

This widefield was obtained at 5 nights first using a Canon 70-200L f/4 at 200mm, but the stars were not round even in the center. So I skipped those stars and did some more nights with the 180mm Sigma Macro at full f/2.8. From the countless 3min subs at Iso800 I selected 240 from the first and 180 from the second series, giving a total of 420subs for the background. Sounds complicated? It was.

To get hold of the IFN nebula near a bigger city is a difficult idea, I added the Idas D1 clip filter, but still needed extensive processing. I tried to keep a natural looking balance in brightnesses, and featuring the galaxies in most possible detail.

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tommy_nawratil
tommy_nawratil
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M81 group of galaxies and interstellar flux nebula, 





    
        

            tommy_nawratil