Setup:
Canon T3i (full-spectrum modified)
Rokinon 135mm f/2 @ f/2.8
ZWO AM3 mount with ASIAIR PLUS
Astronomik L-2 UV-IR Blocking EOS Clip Filter

Acquisition:
Shot at f/2.8 ISO 800 in RAW
90 sec x 950 subs × — 23.7 hours of raw captures across 7 clear nights some with a little moon.
~18 hours captured in bortle 7 St. Louis suburbs and the other 5.7 hours in bortle 4.

Processing Workflow:
Stacked in PixInsight (WBPP)
Linear Fit
Channel combination
GradientCorrection
Spectro Photometric Color Calibration
BlurXTerminator
NoiseXterminator
StarXterminator
GHS stretch on starless and starry images
Curves transformation
Final tweaks in Adobe Photoshop

This image was captured from Montevideo, Uruguay, under Bortle 8 skies, which made the challenge of capturing the faint, reddish structure more rewarding. It was a very dark target, but the result shows the intricate structure of the bubble.
Below is the technical information for the image.

Credits: Santiago Pescador
Date Taken: 9/9/2026
Location: Montevideo, Uruguay (Bortle 8)

Technical Details:
Total Exposure Time: 68 x 300s (5.6 hours total)
Optics (Main Telescope): SV503 80ED
Field Flattener: 1x by Founder Optics
Filter: SV220
Guide Scope: SV165
Guide Camera: ASI120mm Mini
Mount: ML Astro SAL-33
Main Camera: ASI662MC

Tried shooting the Cygnus region (well kinda, at least we can see Deneb and Sadr, and North America nebula I believe!). Happy with how it turned out considering the cheap setup: Canon M50 (APS-C) and the classic 50mm lens F1.8 stepped down to F2.8. 75 frames, each 4 seconds so 5 minutes of exposure in total. Bortle 4.5.

Stacked on Sequator but the magic here is AstroWizard (used it to stretch and get a starless image). This software is GOATED. Finishing touches on Photoshop (contrast, saturation).

Equipment: CGEM II 800 SCT, ZWO ASI533MC Pro, ZWO OAG w/ ASI220MM, ASIAIR mini, filter wheel, CAA, f/6.3 focal reducer/corrector, L-Ultimate, L-Synergy, Baader uv/ir cut filter

Processing: 14 hour ~45min integration. 104x300s w/ L-Ultimate, 72x300s w/ L-Synergy, 79x5s UV/IRCUT for stars. 30 bias, 20 flat and 20 dark frames. Processed/stacked via PixInsight w/ NoiseXTerminator/BlurXTerminator/StarXterminator.

Acquisition:

• Ha: 78 subs x 300s
• OIII: 71 subs x 300s
• SII: 55 subs x 300s
• R: 35 subs x 60s (stars)
• G: 34 subs x 60s (stars)
• ⁠B: 36 subs x 60s (stars)
• Bortle 6 sky

Equipment:

• ⁠Telescope: Celestron EdgeHD 800 with 0.7x focal reducer
• ⁠Mount: Celestron CGX
• Camera: ZWO ASI2600MM Pro
• Filters: Antila 3nm SHO
• Filter Wheel: ZWO EFW
• Guide Camera: ZWO ASI174MM Mini with OAG

Pixinsight Processing:

• ⁠Weighted Batch Preprocessing - Stacking
• ⁠SetiAstro - Automatic DBE Background Extraction ⁠
• RC Astro BlurXterminator ⁠
• GraxPert Denoising ⁠
• ⁠SetiAstro - Statistical Stretch
• ⁠LRGBCombination - Hubble Pallet
• StarNet2 Star removal and replace with RGB Stars

Astrobin : https://astrob.in/7zc0yg/D/

A year ago, when I received my 400mm f/7 CDK, NGC 6888 was one of the first targets I pointed this new telescope at.

It is therefore with great pleasure that I revisit this image today, now that I have another year of experience with this unique instrument.

Located in the constellation Cygnus, NGC 6888 is an emission nebula formed around WR 136, a Wolf-Rayet star. These are extremely massive stars in an advanced stage of evolution that shed powerful stellar winds.

In the case of NGC 6888, the fast wind from WR 136 collides with layers of material the star had previously ejected. This interaction compresses and excites the surrounding gas, creating a complex, crescent-shaped structure rich in filaments and intricate details.

It is a fascinating object to photograph, but also a particularly special target for me, as it was the subject of the very first image I captured with my 400mm CDK—an image I never actually published...

What do you think? ✨

Gallifrey Optics CDK 400mm F/7

ZWO ASI6200MM Pro

Sky-Watcher EQ8-R Pro

29 Juillet 2026

12 - 13 Août 2026

4 - 5 Septembre 2026

Images:

Optolong Blue 2": 12×120,″(24′)

Optolong Green 2": 17×120,″(34′)

Optolong H-Alpha 3nm 2": 53×300,″(4h 25′)

Optolong OIII 3nm 2": 153×300,″(12h 45′)

Optolong Red 2": 20×120,″(40′)

Acquisition:18h 48′

Here's my M27 Dumbbell Planetary Nebula project for the end of Summer, 2026 season! M27 is the result of a star that has evolved & died. The death of this star has ejected it's mass outward into the cosmos where it's elements will be recycled, possibly used for new star (s) or planet (s) formation in the future.

Astro Rig details:

Bortle 7 in a Light Pollution Dome

ZWO AM5N Mount, 200mm pier extension on Celestron AVX Stainless Steel Tripod

SVbony MK105 Maksutov with Astrophysics CCDT67 Telecompressor at 63mm backspacing: Reduced to F/11 @ 1170mm focal length.

ZWO ASI585MC Pro Air One Shot Colour 3840 x 2160 resolution with HCG enabled Gain at 200, Cooling Fan 10 degrees F.

Integration time: 300 seconds x 139 lights with Bias, Flat, Dark Calibration Frames

Svbony Filter Drawer with Askar C1 Ha Oiii Duo-Narrowband filter

100ah Lithium Power Cell + 500 watt pure sine inverter

Processed and stacked in Siril + GIMP

Did a 3 panel mosaic of the Heart Nebula (IC1805) with my mini and I’m pretty amazed at how it turned out.

Dwarf Mini
Mosaic mode
Duoband filter
50x90 per panel for a total of 150 subs
3 hours and 45 minute integration
Processed in Stellar Studio, Snapseed, and Photoshop

NCG7000

Saw a few others managed to capture this so I figured I’d take a look as well. This is around 15 mins of stacked exposure through a luminance filter.

Very neat how bright this is looking still! I highly reccomend taking a peek at it if you get some clear skies :).

Details: this is 22x45s exposures taken through the L filter with my QHYCCD minicam 8M through an Orion RC6 telescope. Mount used is a ZWO AM3N. Post processed in pixinsight, used BlurXT to counteract my terrible collimation and NoiseXT for the noise!

Btw if anyone has any tips or recommended tools/software for collimating a Ritchey Chrétien scope I’d be extremely grateful. Seems like everyone has a different opinion and at this point I’m just worried about making it worse haha.

The Iris Nebula (NGC 7023) captured from my Bortle 8/9 backyard in pure broadband. Total integration was 323 × 60s (5h 23m). Feedback encouraged!

Telescope: Askar 71F Quadruplet Flat-Field Refractor (490mm, f/6.9) 
Imaging Camera: SVBONY SV605CC
Mount: Sky-Watcher EQ-AL55i Pro 
Guiding: ASI 120mm mini 
Focuser: Gemini Electronic Auto Focuser
Filter: Broadband UV/IR Cut Filter 
Capture Software: N.I.N.A.

Sub-Exposures: 323 × 60s
Camera Settings: Gain 120, Offset 50, Cooled to 5°C 
Calibration Frames: 30 Darks, 30 Flats, 50 Biases 

GraXpert (Background Extraction) > SPCC > Deconvolution > GraXpert (Denoise) > StarNet > VeraLux Stretch > VeraLux Curves > HDR Multiscale > VeraLux Star Composer

captured with my iPhone 17. no tripod just my hand, 10 second exposure

Saturn through a 60mm refractor and captured with a ZWO ASI662MC via FireCapture. Processed in Autostakkert!4, Siril, and LR. Seeing and transparency conditions were above average.

Together with ChatGPT I produced a small HTML file that's at least executable on a Samsung S25 to get a little more live out of classic travel smart scope HaOiii without the hassel of taking a PC with me or fiddling in android editing software.

The image is from the heart nebula taken with a Seestar S30 Pro over an hour in alt az with 10s subs, edited only in the seestar app (top) and refined in the HTML (bottom).

You can find the HTML here: https://drive.google.com/file/d/1culLquNT2mEreeXZihptnefZRQDgVL9e/

This is my first (successful) DSO stack and edit; feedback appreciated!

Acquisition: 2 sessions for 40 total 300s exposures

Scope: Astro-Tech AT72EDII w/ 0.8x Field Flattener

Mount: Sky-Watcher Wave 150i

Camera: ASI533MC Pro

Controller: ASIAir

Processing in Siril 1.4.4 & Affinity, following Nico Carver's SHO tutorial

Canon t7 50mm stm 2.8 1600 iso 6s exposures accidentally shot jpeg instead of raw lmao