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Contains:  Helix nebula, NGC 7293, The star υAqr
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Helix Nebula, Narrowband - First light ASI1600mm-c, 


            George Varouhakis
Helix Nebula, Narrowband - First light ASI1600mm-c
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Helix Nebula, Narrowband - First light ASI1600mm-c

Technical card

Imaging telescopes or lenses: SkyWatcher Esprit-80ED f/5

Imaging cameras: ZWO ASI1600MMC

Mounts: SkyWatcher HEQ5 PRO

Guiding telescopes or lenses: Orion 50mm guidescope

Guiding cameras: ZWO ASI120MM

Software: Photoshop CC  ·  PixInsight Pisinsight 1.8

Filters: Astronomik 6nm SII  ·  Astronomik 6nm OIII  ·  Astrnomik 6nm HA

Dates:Sept. 3, 2016Sept. 4, 2016

Astrnomik 6nm HA: 16x900" (gain: 139.00) -15C bin 1x1
Astronomik 6nm OIII: 14x900" (gain: 139.00) -15C bin 1x1
Astronomik 6nm SII: 9x900" (gain: 139.00) -15C bin 1x1

Integration: 9.8 hours

Darks: ~10

Flats: ~40

Bias: ~100

Avg. Moon age: 2.46 days

Avg. Moon phase: 6.89%

Bortle Dark-Sky Scale: 7.00

Basic astrometry details job: 1229761

RA center: 22h 30' 34"

DEC center: -20° 43' 48"

Pixel scale: 1.861 arcsec/pixel

Orientation: -29.119 degrees

Field radius: 1.142 degrees

Resolution: 3610x2544

Locations: Backyard, Sydney, NSW, Australia


This is my first image with a new ota and new ASI1600mm.

This shot was to test long 15min exposures and I'm happy with the results although the processing still needs some refinement.

Testing completed since these subs were taken suggests 5min subs at a slightly higher gain may be the way to go with my setup.

Either way I'm absolutely amazed with this camera and can't wait to see what people can do with it once they have ironed out the details.

All processing was done in PI with final touches in Photoshop. I was uncomfortable with the virtually non existent noise and actually had to add some noise to the background to make it look a little more like what I'm used to seeing.

Thanks for looking any C&C are appreciated.



George Varouhakis
License: None (All rights reserved)

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Helix Nebula, Narrowband - First light ASI1600mm-c, 


            George Varouhakis