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Contains:  NGC 6568, IC 1275, NGC 6559, IC 1274, IC 4685, NGC 6553, NGC 6544, NGC 6546, NGC 6530, M 21, NGC 6531, M 8, Lagoon nebula, Hourglass nebula, NGC 6523, NGC 6526, Trifid nebula, M 20, NGC 6514, The star 14Sgr, The star μSgr, The star 11Sgr, The star 9Sgr, The star 7Sgr, The star 4Sgr
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The Lagoon and Trifid Nebulae - Widefield reprocessed, 





    
        

            Gabriel R. Santos...
The Lagoon and Trifid Nebulae - Widefield reprocessed

The Lagoon and Trifid Nebulae - Widefield reprocessed

Technical card

Resolution: 3600x2400

Dates:July 3, 2016

Frames: 16x120" ISO800

Integration: 0.5 hours

Darks: ~26

Flats: ~20

Bias: ~20

Avg. Moon age: 28.47 days

Avg. Moon phase: 1.26%

Mean SQM: 21.40

Temperature: 6.30

Astrometry.net job: 2094362

RA center: 271.475 degrees

DEC center: -23.336 degrees

Pixel scale: 6.460 arcsec/pixel

Orientation: 89.957 degrees

Field radius: 3.882 degrees

Data source: Traveller

Description

This is - in a nutshell - a spectacular field. Lying in the heart of our Milky Way, this nebulous region is readly visible to the naked eye as a fuzzy star, and more of this nebulosity can be maked out wearing binoculars. However, the true beauty and colours of it can only be captured in long exposure deep astrophotos.

I'm pretty happy with how this image turned out, as it has relatively short integration time - 30 minutes - and 2-4 times more time would yeld more impressive results. However, being a pretty bright target, the region doesn't require extremely deep exposures. Furthermore - as I already imaged this target before (at least 3 times, actually), I just found it better to spend more time in different and deeper regions.

This is a reprocessed version of a 2016 image. Pre processing (calibration and stacking) was done from the ground up, with a much more powerful engine: AstroPixelProcessor (as compared to DSS). The result looked already better since the final stack. Post processing techniques were also refined since last reprocessing, which resulted on a better overall image, at least to me. Color correction and naturality, detail and nebulosity are the best of the 3 attempts. The previous results can be acessed in my gallery. What do you think?

Constructive criticism, comments and suggestions are more than welcome in the comments section. Thank you for taking your time to look at this image.

Taken from Rural Skies (Bortle 3-4; SQM ~21.4*calculated), from MG, Brazil.

Date and Time: July 3, 2016, at 21:15 (start of capture)
Camera: Canon EOS T4i/650D (unmodded), at ISO 800
Lens: Tamron 70-200mm, operated at 200mm f/3.5
Mount: Sky-Watcher HEQ5, tracking, unguided
Exposure Detail: 16x120s (total 32min)

Comments

Author

grsotnas
Gabriel R. Santos...
License: None (All rights reserved)
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The Lagoon and Trifid Nebulae - Widefield reprocessed, 





    
        

            Gabriel R. Santos...