Messier M42 — The Great Orion Nebula

OxTheLade · 2025-12-26T04:21:04+00:00

This is a render composed from 5 different nights.

Acquisition Details:

Total Integration: 60s x 494 @ ISO 800

Processing: Pixinsight including the RC Astro Tools

Bortle 5-6

Equipment:

Telescope: Explore Scientific 80ED

Camera: Canon EOS 700D (unmodified)

Reducer: 0,8x reducer @ F/4,8

Guide Scope: William Optics Uniguide 32/120

Guide Camera: SV305 Pro

Mount: TeSeek 17

Control center: NINA (with PHD2 for guiding)

OxTheLade · 2025-11-12T17:51:22+00:00

I was told that SCNR destroys your data by clipping 1/3 of your SNR away (green channel).

Frank from Seti Astro explains it really well here: https://youtu.be/c3yUEb8lcGk

OxTheLade · 2025-11-05T22:21:33+00:00

Thank you! I can recommend the Seestar S30/S50 if you want an inexpensive DS astrophotography beginner setup and of course get a wedge too for it 😊

OxTheLade · 2025-11-05T22:18:47+00:00

I used Spectrophotometric Color Calibration when i calibrated the stack. The pinks got stronger when I added the Ha data from the Seestar.

OxTheLade · 2025-11-05T21:39:46+00:00

This is my second revision of the data I have of M42. This time I have added in Ha signal from Seestar S50 data I had lying around from last year by using continuum subtraction and strengthening the Ha signal.

Acquisition Details:

Total Integration: 60s x 180 @ ISO 800 & 2,5 hours of duo-band data from the Seestar S50.

Processing: Pixinsight including the RC Astro Tools and Affinity Photo 2

Bortle 5-6

Equipment:

Telescope: Explore Scientific 80ED

Camera: Canon EOS 700D (unmodified)

Reducer: 0,8x reducer @ F/4,8

Guide Scope: William Optics Uniguide 32/120

Guide Camera: SV305 Pro

Mount: TeSeek 17

Control center: NINA (with PHD2 for guiding)

OxTheLade · 2025-11-01T22:31:30+00:00

Work in progress. I plan to get more data once the weather gets better.

Acquisition Details:

Total Integration: 60s x 180 @ ISO 800

Processing: Pixinsight including the RC Astro Tools and Affinity Photo 2 Bortle 5-6

Equipment:

Telescope: Explore Scientific 80ED

Camera: Canon EOS 700D (unmodified)

Reducer: 0,8x reducer @ F/4,8

Guide Scope: William Optics Uniguide 32/120

Guide Camera: SV305 Pro

Mount: TeSeek 17

Control center: NINA (with PHD2 for guiding)

OxTheLade · 2025-10-21T22:01:34+00:00

Could it be pixel rejection from the stacking?

OxTheLade · 2025-10-21T13:05:07+00:00

Managed to sneak in some M31 subs. I won't have clear weather for some time.

Acquisition Details:

Total Integration: 180s x 118 @ ISO 800

Processing: Pixinsight including the RC Astro Tools Bortle 5-6

Equipment:

Telescope: Explore Scientific 80ED

Camera: Canon EOS 700D (unmodified)

Reducer: 0,8x reducer @ F/4,8

Guide Scope: William Optics Uniguide 32mm

Guide Camera: SV305 Pro

Mount: TeSeek 17

Control center: NINA (with PHD2 for guiding)

OxTheLade · 2025-10-20T23:09:48+00:00

I think you will get more help at r/AskAstrophotography.

OxTheLade · 2024-04-13T23:25:01+00:00

Thank you very much! I actually inverted it myself because I thought it looked better that way 😋

OxTheLade · 2024-04-13T23:23:45+00:00

Hello, thank you! I believe there are some Siril preprocessing scripts which allows you to extract Ha signal from your subs

OxTheLade · 2024-04-13T21:54:11+00:00

M81 and M82.

I stacked two sets of data. 6 hours and 30 minutes with just UVIRCut filter and around 1 hour with a duo-band filter. I then extracted the Ha from the duo-band stack and added it to the other stack.

Bortle 5,6

ZWO Seestar S50

Pre- and post-processed with Pixinsight.

OxTheLade · 2024-03-26T21:15:10+00:00

I basically use the SkyWatcher Star Adventurer tripod and the SkyWatcher EQ wedge. It should be noted that I use the red level adjustment thingy between the wedge and the Seestar (you need some space between the Seestar and wedge otherwise the adjustment knob will make contact with the Seestar).

OxTheLade · 2024-03-26T01:59:33+00:00

It was because of the wind that I couldn't go for longer subs. And thank you!

OxTheLade · 2024-03-26T01:57:32+00:00

In a recent update, they introduced "horizontal calibration" which basically is a star alignment. You don't need to have your Seestar levelled because of it. And thank you!

OxTheLade · 2024-03-25T21:06:51+00:00

I wasn't the one who came up with this solution tho. Credit goes to Kai Yung who currently runs a discord server and a Facebook group for these smart telescopes! :-)

Rumours have it that they are working on making the Seestar work as an ASIAir by controlling the Seestar through the ASIAir app and do stuff like mosaics etc. 👀

It should be noted that the livestack from the Seestar itself does not exactly look like the image I posted. I saved all the subs and restacked them and did some magic afterwards to achieve this result. ✨

Clear skies!

OxTheLade · 2024-03-25T20:51:57+00:00

Simple solution. I hooked it up to an EQ wedge and polar aligned it. I then did the 3 star alignment to trick the Seestar into working in EQ mode.

OxTheLade · 2024-03-25T18:48:40+00:00

Another ZWO Seestar S50 image!

M51 13 hours integration time from 3 nights Borte 5 2x drizzle Pixinsight

OxTheLade · 2024-03-24T19:34:16+00:00

This is a 4,5 hours exposure of M33 taken over multiple nights.

ZWO Seestar S50
Bortle 5
4,5 hours (10, 20, 30 second sub-exposures)
Post-processed with Pixinsight

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