SH2-117, North America, Pelican, 135mm, ASI1600mm-pro (sletmoep)

Celestial hemisphere: Northern · Constellation: Cygnus (Cyg) · Contains: 50 Cyg) · 62 Cyg · Arided · Aridif · Arrioph (α Cyg · IC 5068 · IC 5070 · NGC 6997 · NGC 7000 · NGC 7039 · North America Nebula · Pelican Nebula · The star 55 Cyg · The star 56 Cyg · The star 57 Cyg · The star 60 Cyg · The star Deneb · The star ξ Cyg

SH2-117, North America, Pelican, 135mm, ASI1600mm-pro, sletmoep

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SH2-117, North America, Pelican, 135mm, ASI1600mm-pro

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SH2-117, North America, Pelican, 135mm, ASI1600mm-pro

My wide field imaging rig consists of these components: A Rokinon 135mm lens attached to an EFW and ASI1600mm-pro using ZWO's EOS adapter. This is mounted to a Celestron AVX using ZWO's Holder Ring. The ring has piggyback holes on top to which I have attached the mini Svbony guide scope and a SSAG.

I really like this setup for wide field work. Back focus has not been an issue. But fine tuning the focus via the Rokinon lens has taken some experimentation.

In this image - all light frames are 300 seconds and taken over two nights.

Ha: 25 frames
Oiii: 37 frames
Sii: 36 frames

Calibration frames include 10 each of bias, dark, darkflat, and flat.

Bias frames are 0.3 seconds.

Flat and darkflat frames are 0.5 seconds.

Flat frames are taken with a usb light panel (for drawing) covered by 8 pieces of printer paper.

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Version 2:

Ha: 25 frames
Oiii: 95 frames
Sii: 48 frames

This version uses the same number of Ha frames, but with additional data, so the overall quality is better. Oiii and Sii have additional frames.

Also, in this version, I used the SHO blending algorithm from thecoldestnights.com which produces an image with more red in it.

Let me know which one you like better: the more green or the more red version.

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Version 3:

This is the same data source as version 2 but includes more stars for context. I think I like the less stars better. What do you think?

Original
Final
C
D

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The “AstroBin Image of the Day and Top Picks”, or IOTD/TP, is a long-running system to promote beautiful, interesting, peculiar, or otherwise amazing astrophotographs, with a focus on technical excellence. Learn more.

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Status	Basic success
Started	...
Astrometry.net job	8146035
PixInsight job	n/a
PixInsight queue size	n/a
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SH2-117, North America, Pelican, 135mm, ASI1600mm-pro

SH2-117, North America, Pelican, 135mm, ASI1600mm-pro

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SH2-117, North America, Pelican, 135mm, ASI1600mm-pro

SH2-117, North America, Pelican, 135mm, ASI1600mm-pro

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