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Contains:  41 the01 Ori, 42 c Ori, 43 the02 Ori, 44 iot Ori, 45 Ori, De Mairan's nebula, Great Nebula in Orion, Hatysa, M 42, M 43, M43, NGC 1973, NGC 1975, NGC 1976, NGC 1977, NGC 1980, NGC 1982, NGC1973, NGC1975, NGC1977, NGC1980, Sh2-279, Sh2-281, The star 42Ori, The star 45Ori, The star θ1Ori, The star θ2Ori, The star ιOri
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Orion redux, after about 3 years of progress (M42), 


            Sven Hoffmann
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Orion redux, after about 3 years of progress (M42)

Technical card

Dates:Nov. 11, 2018Nov. 16, 2018Jan. 21, 2019Jan. 22, 2019Feb. 4, 2019

Baader 7nm Ha: 41x18" (gain: 139.00) -30C bin 1x1
Baader 7nm Ha: 148x180" (gain: 139.00) -30C bin 1x1
B: 165x60" (gain: 76.00) -30C bin 1x1
G: 164x60" (gain: 76.00) -30C bin 1x1
R: 156x60" (gain: 76.00) -30C bin 1x1

Integration: 15.7 hours

Darks: ~16

Flats: ~16

Flat darks: ~16

Avg. Moon age: 14.48 days

Avg. Moon phase: 54.12%

Bortle Dark-Sky Scale: 5.00

Temperature: -5.00 job: 2524382

RA center: 5h 35' 2"

DEC center: -5° 20' 34"

Pixel scale: 1.412 arcsec/pixel

Orientation: -92.956 degrees

Field radius: 1.098 degrees

Resolution: 4529x3292

Data source: Backyard


Hi everyone,

I've been doing astrophotography for a little over three years now. I think I have come a long way in that time and learned a lot. When my girlfriend recently asked me for an image of the orion nebula for a large sized print I though "No, the old image wasn't too bad but you can do it better now".
(old image:

So I got to work to create an image that is matching my current level of skill in this hobby. I want to share my result with you today.
Since the Orion Nebula is the brightest nebula in the northern hemisphere it is the easiest and one of the toughest to image well. You definitely need to do HDR when you have a camera like me and you want to capture the core and outer faint nebulosity.
The weather really made this image a challenge as I had not a single clear night from mid of November to mid of January. But with enough patience I finally managed to get the ~16h of exposure time done.

I opted for a different approach here and did not capture luminance but rather captured a lot of HA which I combined with a pseudo luminance from the RGB channels for the whole detail information. I'm still not sure if it was a good choice but I am happy with the final image. I hope you enjoy it :)



Sven Hoffmann
License: None (All rights reserved)

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Orion redux, after about 3 years of progress (M42), 


            Sven Hoffmann