Orion HDR image (Timothy Straub)

Celestial hemisphere: Southern · Constellation: Orion (Ori) · Contains: 41 Ori A) · 41 Ori C · 41 Ori D · 41 the01 Ori · 42 Ori) · 42 c Ori · 43 Ori) · 43 the02 Ori · 44 Ori) · 44 iot Ori · 45 Ori · Great Orion Nebula · HD36559 · HD36606 · HD36629 · HD36655 · HD36670 · HD36671 · HD36782 · HD36842 · HD36843 · HD36865 · HD36883 · HD36917 · HD36918 · HD36936 · HD36938 · HD36957 · HD36958 · HD36959 · And 53 more.

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Orion HDR image

Revision title: Take 3 Orion HDR

Powered byPixInsight

Orion HDR image

Revision title: Take 3 Orion HDR

This is my first attempt at an HDR composition for the Orion Nebula. While not intuitive, Orion is difficult to photograph and process because of its really bright core to really dim features. Finding a single exposure time that preserves core, captures details of the faint nebulosity and dust, and shooting enough to mitigate noise is tough. A number of tutorials are out there to create HDR images, so I thought I would try. For this attempt I shot 30 exposures at each of the following exposure times: 10 seconds, 30 seconds, 60 seconds, and 120 seconds. Each exposure stack went through WBPP in Pixinsight, and each master was then registered using the "align by coordinates script." After HDR composition, I used standard PI processing. For the starless, several rounds of GHS, HDRmultiscale transform, and local histogram equalization was employed to get a balance of core and detail. Stars were treated using Histogram and Curves. The combined image was exported as a TIF and touched up in Camera Raw.

Original
Final
B

B

Title: Take 3 Orion HDR

Description: While I had a lot of positive comments on social media, I wanted to see if I could get a little better balance. In this revision, I dropped the 10 second data because it was too noisy, and I could see the Trapezium fairly well in my 30 second data. I was a little less aggressive with HDR multi scale transform, and tried to bring up the background dust a little better. With the IDAS NBZ UHS filter in both compositions, the dust will not show as well as an unfiltered one shot color camera photograph. But we have several months to optimize HDR images.

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Status	Advanced success
Started	...
Astrometry.net job	8603617
PixInsight job	RCB4LO10MJQEEAWKE06X3MURWBHWE53Q
PixInsight queue size	n/a
PixInsight stage	TASK_LOG

RA (center)	05h35m19s.71
RA (top/left)	05h39m00s.71
RA (top/right)	05h32m39s.00
RA (bottom/right)	05h31m37s.78
RA (bottom/left)	05h38m01s.80

Dec (center)	-05°17′35″.1
Dec (top/left)	-04°21′48″.7
Dec (top/right)	-04°10′08″.8
Dec (bottom/right)	-06°13′22″.2
Dec (bottom/left)	-06°25′02″.6

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Orion HDR image

Revision title: Take 3 Orion HDR

Orion HDR image

Revision title: Take 3 Orion HDR

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Orion HDR image

Revision title: Take 3 Orion HDR

Orion HDR image

Revision title: Take 3 Orion HDR

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Acquisition details

Description

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Sky plot

Histogram

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