M16 and surroundings at 85mm (JDJ)

M16 and surroundings at 85mm

This wide field image of M16 (Eagle Nebula), M17 (Omega Nebula), and the surrounding region was captured over three nights of August 2022 using a short telephoto lens, a dual narrowband filter, and a OSC DSLR. M16 and the surrounding region are tough targets from my location - I get about 1.5 hrs per night as the target passes through an opening between several trees and the target is low in the sky in the direction of the some serious light pollution.

Imaged with 85mm/F1.4 Rokinon at F/2, STC Duo Narrowband Clip Filter, and full spectrum modified Nikon D5300.

Total integration time was ~9 hours using 57 subs at ISO400 x 120 sec. Pre-processed using PixInsight Weighted Batch Pre-Processing (WBPP) script. Images calibrated using darks, bias, and flats. Extracted red/green/blue channels using BatchChannelExtraction script. R, G, & B channels registered and stacked independently using StarAlighment and Integration. R channel data gives the Ha image. Averaged G & B channels using Pixelmath to generate OIII image.

R and Average of G+B channels individually post-processed in Pixinsight: Cropped, gradient removal with ABE. Additional processing in Pixinsight included: histogram transformation using STF settings, generalized hyperbolic stretch, curves transformation, TGV denoise, hdr transformation, local histogram transformation and morphological transformation processes.

Original version: HOO image

Rev B: Ha data

Rev C: OIII data

Original
Final
B
C

B

Description: Ha data

Uploaded: ...

C

Description: OIII data

Uploaded: ...

DSLR narrowband
DSLR/Mirrorless Imagers from the World
Hydrogen and Oxygen Narrowband Only!
Suburban Astrophotography
Camera Lens Astrophotography
William Optics GT Series
Nikon Imagers
Cloudy Nights
STC Dual Narrowband filter images

	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	6666062
PixInsight job	2NGEZRPAT79VD3E1U53I07LC3A3NLLNT
PixInsight queue size	n/a
PixInsight stage	TASK_LOG

RA (center)	18h19m56s.94
RA (top/left)	18h37m02s.28
RA (top/right)	17h58m18s.47
RA (bottom/right)	18h02m03s.70
RA (bottom/left)	18h42m21s.44

Dec (center)	-14°55′57″.1
Dec (top/left)	-09°42′24″.6
Dec (top/right)	-10°49′35″.9
Dec (bottom/right)	-20°03′21″.4
Dec (bottom/left)	-18°54′18″.3

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