Hemisphere:  Southern  ·  Constellation: Orion (Ori)  ·  Contains:  Great Nebula in Orion  ·  M 42  ·  M 43  ·  NGC 1976  ·  NGC 1977  ·  NGC 1980  ·  NGC 1982  ·  The star 42Ori  ·  The star 45Ori  ·  The star θ1Ori  ·  The star θ2Ori  ·  The star ιOri
M42 in monochrome, 



    
        

            Henry Kwok
M42 in monochrome
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M42 in monochrome

M42 in monochrome, 



    
        

            Henry Kwok
M42 in monochrome
Powered byPixInsight

M42 in monochrome

Technical card

Imaging telescopes or lenses: William Optics GT81 Apo

Imaging cameras: Atik 314L+

Mounts: iOptron ZEQ25GT

Guiding cameras: QHYCCD QHY5L II Autoguider

Focal reducers: William Optics 0.8x Field Flattener Type VI

Software: GIMP 2.9  ·  DeepSky Stacker 3.3.4

Accessory: Orion Thin Off-Axis Guider (TOAG)


Basic astrometry details

Astrometry.net job: 418097

RA center: 05h34m56s

DEC center: -05°2808

Pixel scale: 3.433 arcsec/pixel

Orientation: -100.436 degrees

Field radius: 0.828 degrees


Resolution: 1391x1039

Locations: Home, Auckland, New Zealand

Description

I acquired this image as part of my test for my recently acquired WO GT81 and secondhand Atik 314L+, mounted on my ZEQ25. I took only three subs at 10 seconds, 5 minutes and 10 minutes with no filter while ironing out the mount. I did a quick HDR combine and performed very limited editing since I had the subs anyway to see what I could get. I do not have commercial software to do HDR combine, so I used manual methods with GIMP 2.9. Unfortunately, I cannot find any reference on how to do noise reduction in GIMP 2.9, and I can no longer get the file back into Pixinsight LE for noise reduction - so this is one noisy picture. If you have any tips on how to denoise in GIMP 2.9, please let me know. Overall I am quite happy with the setup. Still need to tweak reducer spacing and mount balance.

Comments

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Histogram

M42 in monochrome, 



    
        

            Henry Kwok