Orion & Friends (Steve Ludwig)

Orion & Friends

Equipment

- Nikon D3300 (unmodified)

- Samyang 135mm f2 @ f2

- Skywatcher Star Adventurer Pro Pack

- no-name tripod

Acquisition

- 31 light frames x 120 s = 1 h 30 s total exposure time

- no dark, flat, bias frames

- no filters

- ISO 100

- Bortle 4 zone

Stacking

-> light frames stacked in "Deep Sky Stacker" (DSS)

-> bilinear debayer method

-> median kappa sigma clipping method

Processing in Pixinsight

-> opened unmodified TIF

-> STF stretch

-> dynamic crop

-> dynamic background extraction

-> background neutralization

-> color calibration

-> HDR multiscale transform to reveal more details in M42 core

-> SCNR green to remove green (noise) pixels and to improve noise

-> use of Starnet++ module to separate stars and background

Stars

-> curves transformation to increase saturation

-> invert image

-> SCNR green to remove purple star fringes

-> invert image

Background

-> range selection to generate lightness mask that covers all nebula

-> curves transformation to increase saturation of all nebula

-> invert mask

-> curves transformation to massively reduce saturation of background (color noise reduction)

-> remove mask

-> ACDNR with integrated lightness mask function to reduce noise of background and darker nebula parts

-> pixel math to recombine stars and background

-> final histogram transformation

-> resample 50%

-> saved as jpg

Original
Final
D

D

Description: I had another look at my Orion image and noticed that it was massively over-processed. My new revision looks much more natural. Furthermore, I was able to remove purple star fringes (see processing details).

Uploaded: ...

Camera Lens Astrophotography
PixInsight Addicts
/r/astrophotography
Sky-Watcher Star Adventurer

Deep Space Objects

	Distinct awarded users	Total awarded images
Image of the day
Top picks
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	Image of the day	Top pick	Top pick nominations	Total submitted
Deep sky
Solar system
Extremely wide field
Star trails
Northern lights
Noctilucent clouds
Landscape

	Image of the day	Top pick	Top pick nominations	Total submitted
Backyard
Traveller
Own remote observatory
Amateur hosting facility
Public amaeteur data
Professional, scientific grade data
Mix of multiple sources
Other
Unknown

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Status	Advanced success
Started	...
Astrometry.net job	3930502
PixInsight job	UGHYKYR3N8XEQQKJ52TL2OK3OPZ7VPFU
PixInsight queue size	n/a
PixInsight stage	n/a

RA (center)	05h33m09s.2
RA (top/left)	05h29m30s.4
RA (top/right)	05h12m17s.7
RA (bottom/right)	05h36m49s.2
RA (bottom/left)	05h53m52s.9

Dec (center)	-02°44′27″
Dec (top/left)	+03°16′53″
Dec (top/right)	-05°56′00″
Dec (bottom/right)	-08°46′11″
Dec (bottom/left)	+00°27′56″

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Orion & Friends

Orion & Friends

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Orion & Friends

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