HDR Orion in Ha (Andreas Dietz)

Celestial hemisphere: Southern · Constellation: Orion (Ori) · Contains: Great Nebula in Orion · Horsehead nebula · IC 430 · IC 432 · IC 434 · M 42 · M 43 · M 78 · NGC 1975 · NGC 1976 · NGC 1977 · NGC 1980 · NGC 1981 · NGC 1982 · NGC 1990 · NGC 1999 · NGC 2023 · NGC 2024 · NGC 2064 · NGC 2067 · NGC 2068 · Part of the constellation Orion (Ori) · The star 42Ori · The star 49Ori · The star Alnilam (εOri) · The star Alnitak (ζOri) · The star θ1Ori · The star θ2Ori · The star ιOri · The star σOri · And 1 more.

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HDR Orion in Ha

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HDR Orion in Ha

At the end of the year I'm cleaning my project folder and suddenly found one of my first tries of NB imaging with my mirrorless Sony camera.

Enjoy it!

PS: Let me add some background informations about the processing: As I use a RGB image sensor, I can only use the Red channel for Ha data. In this case the M42 nebula was totally saturated at 30s exposure time and I didn't take some short subs for the bright regions. But in the Green and Blue channels there's also some amount of Ha signal. These channels are a little bit sensitive for red light. I measured a factor of 1:23 (green) and 1:53 (blue channel) in relation to the red channel, see versions B and C. Finally I combined here the red and the blue channel for a HDR image.

As you can see here, that workaround works pretty well!

Original
B
C
Final
D

B

Description: Red channel with saturated M42

Uploaded: ...

C

Description: blue channel with only 1/53 of red signal value, but with less saturation

Uploaded: ...

D

Description: Enhanced background

Uploaded: ...

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HDR Orion in Ha

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B

C

D

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