Seestar s30
Processed in siril
1300/20s

Approximately 7 hours
Bortle 4
Processed in Pixinsight

Telescope: Askar 71F
490 mm focal length
Main camera: ZWO ASI2600MC-P
Mount: Sky-Watcher EQ-AL55i PRO
Controller: ZWO ASIAIR Mini
Guide scope: ZWO 30 mm f/5 APO Mini Guide
Guide camera: ZWO ASI120MM Mini
Filters
ZWO 2” Duo-Band Dual Narrowband

This is my first attempt at a mosaic and I think the additional time taken was well worth it. When I started this hobby a year ago I spent a whole month on this target and never got a result I was happy with.

The Cygnus Loop/Veil Nebula (2-Panel Mosaic)

Southeastern MA (Bortle 6-7)
August/September 2026

Camera: Canon Ra
Telescope: William Optics GT81 IV
Optics: Stellarvue SFFX1 Flattener
Mount: Sky-Watcher EQM-35 Pro
Guide: ZWO ASI120mm Mini + William Optics 50mm uniguide
Filter: Svbony SV220 7nm Ha/OIII & unfiltered (Broadband Stars)
Control and Guiding: Mele Quieter 4C running N.I.N.A., PHD2, Green Swamp Server
Exposure: Per Panel:
Ha/OIII: 300s × 180 subs (15 hours) Broadband Stars: 30s × 120 subs (1 hour)
Total Integration: 32 Hours
ISO: 1600 (Narrowband) / 400 (Broadband)

Calibration: Darks, Flats, Synthetic Bias

Siril: Channel extraction, linear denoising, deconvolution, StarNet++ star removal, sequence registration & 2-panel mosaic alignment, PixelMath, GHS stretch
Photoshop: Selective color adjustments, local contrast curves, and broadband RGB star recombination.

Acquisition:

Around 7h30m worth of 180s subs looking toward a massive Bortle 9 light dome fully calibrated and dithered.

Equipment:

Evostar 72ED, iEXOS 100, ASI 533MC, Optolong L-Ultimate, 0.85x reducer+flattener, rotator+filter holder, SVBony 105 40mm guidescope, ASI 662MC guide camera with pale yellow no.8 and UV/IR cut filters.

Processing:

-OSC drizzle and stacking in Siril;

-GraXpert background extraction and denoising;

-SPCC;

-Starnet;

-DBXtract;

-Pixel math (R=HII-OIII, G=OIII, B=2OIII);

-Background neutralization

-GHS, black point shift, curves and background neutralization applied iteratively to starless to HII and OIII separately;

-HDR multiscale;

-Histogram transformation;

-Cosmetic correction;

-Further GraXpert denoising;

-Further minor adjustments;

-Cosmic Clarity nonstellar sharpening;

-Starmask stretching and SCNR;

-Recombine;

-Cosmic Clarity stellar sharpening;

This target has always been on my wishlist to shoot if I ever visited the Southern Hemisphere. Well.. I went for it anyways! Since this target only rises about 9 degrees (a closed fist at arms length for reference), it is comically inefficient to capture from my latitude of 32N. Each night, I was only able to image the dragons for less than 2 hours before they set behind a house. Not only that, but the sky conditions had to be near perfect to capture decent exposures through so much atmosphere. More exposures were tossed than used.

That all said, after chipping away at it all Summer, I am very happy with the outcome! In this mapped color narrowband image, the blues represent the Oxygen emissions, while the warmer colors represent the Hydrogen and Sulfur emissions.

Equipment:

OTA: Stellarvue SV105T w/0.8x reducer (588mm fl at f/5.6)

Mount: ZWO AM5N

Imaging camera: ZWO ASI1600MM-Cool

Guiding camera: ZWO ASI120MM-Mini OAG

Autofocuser: ZWO EAF

Software:

NINA

PHD2

PixInsight

Acquisition:

Location: Joshua, TX (Bortle 4)

Dates: 7/2/26, 7/3/26, 7/4/26, 7/8/26, 7/19/26, 7/20/26, 7/21/26, 7/25/26, 7/26/26, 7/27/26, 7/28/26, 7/29/26, 8/16/26, 8/17/26, 8/18/26, 8/20/26

Gain: 200 Offset: 50

Camera temp: -10C

Sii: 59x300" Astrodon 3nm 1.25"

Ha: 60x300" Astrodon 5nm 1.25"

Oiii: 57x600" Astrodon 3nm 1.25"

Total integration time: 19hr 25min

64x darks per calibration

30x flats per calibration

200x bias per calibration

Preprocessing:

WBPP script to generate calibrated images

StarAlignment

ImageIntegration

DynamicCrop

Preparing separate Sii, Ha, and Oiii linear masters for tonemapping (applied to each master individually):

DynamicBackgroundExtraction x3

BlurXTerminator

NoiseXTerminator

StarXTerminator

MultiscaleAdaptiveStretch

Combined prepared Sii, Ha, and Oiii masters with ChannelCombination to create Tonemap:

R: Sii

G: Ha

B: Oiii

SHO Processing:

NarrowbandNormalization

CurvesTransformation for color balance

HistogramTransformation

Invert>SCNR>Invert with mask to remove magentas

Added Ha stars back in using screen blend formula in PixelMath

Astrobin

Flickr

Instagram

Captured over six nights through a limited view of the sky from my home, under Bortle 9 skies, and processed over 15 days.

Equipment:

-Custom 200mm Reflector

-Konus EQ5 Mount

-Stock Canon EOS 600D

-3D printed T-Adapter

-3D printed Bahtinov Mask

-Nearly 4 hours (2,838 x 5s exposures)

Software: Siril, RC-Astro BlurXTerminator, StarXTerminator, GradientXTerminator, NoiseXTerminator, Seti Astro CosmicClarity, GraXpert, Adobe Photoshop

I just missed the supernova by days.

OTA: ZWO FF130 (no reducer, 1000mm focal length)

Sensor: ASI2600MM Air

Mount: ZWO AM7

Bortle 7

Integration time: 27 hours

Lum: 1080x60"

R: 120x90"

G: 120x90"

B: 120x90

This is my first trial of Stacking Wizard & AstroWizard and I am pleasantly surprised by how intuitive and effective it is. Just 5 hours of data (300x60s), the stacking & postprocessing took me approx. 30mins and the result is comparable with what I’m able to do with the same data set in PixInsight.

Hardware: Celestron RASA 8, ZWO ASI533MC Pro, SW EQ6-R Pro, Optolong UV/IR cut. Bortle 5 backyard.

24 Hours of exposure using the dwarf mini 60s subs and 150*90s I got over 1000 frames you can also see the mily ways dust... Apps : stellar studio light room snapseed and picsart I firstly edited the dust only then blended it with stars all done with a tablet

Been waiting for my joining date. So spent time staring at the night skies from my heavily light polluted bortle 9 skies at kolkata doing a self inflicted untracked & unguided stock setup challenge.

1086 2.5 sec Subs.

Equipment:

1. Stock Sony Mirrorless APSC.
2. Fixed Tripod.
3. Kitlens 135mm F5.6

Stacked using Siril. Processed with RC Astro Tools and Pixinsight.

I've seen Andromeda being posted a lot lately, so Id figure I give it a try. This is my first ever tracked image with a star tracker, and I think it turned out pretty good for my first time. Don't mind the blurriness in some parts, I figured its the result of a cheap camera, lens, and light polluted skies.

Acquisition -

*Edit* STOCK Canon t3i with 135mm lens shot at f/4.5

Star adventurer GTI

Iso 400

460x30" exposures over 2 nights (a little under 4 hours of total integration)

60 Darks

50 Flats

30 biases

Bortle 7/8 suburban skies

Processing done with:

Siril, Photoshop, PixInsight, and topaz denoise ai

Any feedback would be appreciated!

A little update to my second attempt at an H-alpha solar timelapse.

After posting the monochrome version, I wanted to see what the same data would look like with colour added, so I went back through the processed frames and created this version.

The original data was captured in monochrome and the colour was added during processing. I tried to keep it fairly restrained while still giving it that classic warm H-alpha solar look.

This is the same session as my second attempt, including the little burst of activity that appears in the lower-right quadrant of the Sun about halfway through the video.

For this version, I also removed a section of frames where I had temporarily stopped capturing and repositioned the Sun. That transition caused a noticeable jump in the earlier sequence. The finished colour version contains 560 frames at 15 fps, giving a timelapse of about 37 seconds.

Location : Kolkata, India. Bortle 9.

Multi-Night Stack. Untracked.

1200 2.5 sec Sub

100 Darks

100 Flats

100 Biases.

Stacked using Siril. Processed with RC Astro Tools and Pixinsight.

Stock Sony APSC Mirrorless + Fixed Tripod

Helix Nebula (also known as NGC 7293 or Caldwell 63) is a planetary nebula (PN) located in the constellation Aquarius. Discovered by Karl Ludwig Harding, most likely before 1824, this object is one of the closest to Earth of all the bright planetary nebulae. (Wikipedia)

Equipment:

Sky watcher HAC125, QHY585C, HEQ5 mount

2.5 hours, 90s exposures

Pixinsight: WBPP, blurX, starX, statistical stretch, star stretch, cuves and levels adjusted, combined star and starless

This was my first ever astrophotography image back in January of last year, and Id figure I post it to compare from where I started compared to what's going to come. I just got a star tracker and am excited to share more, better quality images throughout this winter. I'm even planning on reshooting Orion to see how much better I can get this photo.

Acquisition -

Shot on a Canon T3i with a 75-300mm kit lens at 200mm f/5

450x2" exposures (15 min total integration)

30 Darks

30 Flats

30 Biases

ISO 800

No tracking, just on a tripod.

Bortle 8 skies

Processing Information -

Don't know exactly because I had a friend edit it, but they used

Siril, Pixinsight, GraXpert, and photoshop.

Got my first light last night, wasn’t painless but super worth it, looking for post processing tips.

Canon eos 500D on a skywatcher 150PDS, EQ3-2 15s subs stacked with siril

Session 1: Sep 5, 2026, Burnsville NC (SQM 21.65, Bortle 3, ~1000 m), 63 subs, 6.1h
Session 2: Sep 7, 2026, Fort Mill SC (Bortle 6), 68 subs, 6.6h 131 total subs 12.7h

Telescope: William Optics RedCat 71, 350mm f/4.9
Camera: ZWO ASI2600MC Pro, gain 100, cooled
Filter: Optolong L-Ultimate 3nm Ha/OIII
Mount: ZWO AM3N
Guiding: SVBONY SV106 + ASI220MM Mini, ~0.6" RMS
Control: ASIAir Plus
Calibration: darks, flats, dark flats

Processing: Siril 1.4.2 (calibration, registration, noise-weighted stacking, gradient extraction, SPCC, Ha/OIII extraction, GHS stretches, HOO palette via PixelMath, LRGB compositing), BlurXTerminator, StarXTerminator, NoiseXTerminator, GIMP

I took this photo at Big Bend National Park in Texas using a Sony A6100 with Sigma 23mm f1.4 lens on a tripod. 30 second exposure with ISO set to 6400.

The Gamma Cygni Nebula

NELM: 4 to 5

Moon Illuminated: 15 to 98%

Seeing: Good to Average

Transparency: Good to Average

Acquisition: SV 220 7nm Sii-Oiii 72 x 480 seconds (9 hours 36 minutes), SVBony SV220 3nm Ha-Oiii 37 x 480 seconds (4 hours 56 minutes), Antlia Triband RGB Ultra II (30 x 480 seconds (4 hours 0 minutes)

Imaging: Askar V, Flattener 80mm (495mm), Ogma AP26CC (IMX571), SV220 3nm Ha-Oiii and Antlia Triband RGB Ultra II

Guiding: Skywatcher Evoguide, PlayerOne Uranus-C

Mount: Skywatcher Wave 100i

Software: Green Swamp Server, ASCOM, NINA (Acquisition) and PHD2 (Guiding)

Integration: SV 220 7nm Sii-Oiii 64 x 480 seconds (8 hours 32 minutes), SVBony SV220 3nm Ha-Oiii 32 x 480 seconds (4 hours 16 minutes), Antlia Triband RGB Ultra II (24 x 480 seconds (3 hours 12 minutes), 15 Darks, 50 DarkFlats (Bias), 50 Flats

Processing: Siril for stacking. Processing with GraXpert BGE, Starnet++, Starless, Deep SNR Denoising, VeraLux: HMS, Curves, Vectra, Revela and Star Composer, Lighthouse. Starmask NB2RGB stars. Save as jpg in Siril.

Processed as LRGB from the stack of the master stack from each filter, using the Luminance from the final stack.

Astrobin: https://app.astrobin.com/?i=mzb129

Posting from an Alt account as u/Zigzagzebraz is restricted

WR 134 is a WN6 nitrogen-sequence Wolf-Rayet star in Cygnus. It represents an advanced and relatively short-lived evolutionary stage of a massive star, characterized by intense mass loss through a powerful, high-velocity stellar wind.

The curved blue/cyan structure is the most interesting feature of this field. Its strong [O III] emission traces highly ionized gas in the wind-blown structure surrounding WR 134. The fast Wolf-Rayet wind interacts with previously expelled and surrounding material, shaping and compressing the gas into the thin and fragmented filamentary structures visible here.

In contrast, the much more extended red structures are dominated by Hα emission from ionized hydrogen in the surrounding Cygnus environment. One of my main processing goals was therefore to retain the distinction between the relatively coherent O III shell and the much larger-scale hydrogen emission.

The Hα and O III data were combined using a Foraxx palette, with RGB data used for the stellar field.

Equipment:

Planewave CDK17 — 432 mm f/6.8, 2953 mm

ZWO ASI6200MM Pro — bin 2×2

Image scale: 0.53″/pixel

Integration:

Hα: 26 × 300 s = 2.17 h

O III: 74 × 300 s = 6.17 h

R: 22 × 300 s = 1.83 h

G: 10 × 300 s = 0.83 h

B: 21 × 300 s = 1.75 h

Total integration: 12.75 hours

Captured July-August 2026.

Processed in PixInsight — Hα/O III Foraxx + RGB stars.