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User / Daniel_Koehn / Sets / Celestron C14 Edge HD Telescope
Daniel Köhn / 193 items

N 2 B 296 C 2 E Aug 12, 2020 F Aug 12, 2020
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12.08.2020, 02:32 UT

ZWO ASI 290MM + C14 Edge HD
+ 2x Baader VIP Barlow
+ Baader IR filter (685 nm)

Firecapture for SER file recording

Seeing: 6/10
Transparency: 3/5

Post-Processing:
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Autostakkert!3: 400 / 5000 frames stacked
Registax 6: histogram correction, wavelet sharpening
Adobe Photoshop CS2: image crop, level correction,
unsharp mask
Topaz Denoise: Noise reduction

Location: Schwentinental OT Raisdorf

N 0 B 320 C 0 E Aug 4, 2021 F Aug 3, 2021
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Ha: 16.07.2021, 23:45 - 00:52 UT
OIII: 17.07.2021, 23:43 - 00:32 UT

ZWO ASI 183 MM Pro @ -15°C (Gain=139, Offset=21)
+ C14 & Starizona Hyperstar @ 675 mm (f/1.9)
+ Baader 2" Ha, OIII filter
on CGE-Pro mount

Cable managment to mitigate diffraction spikes.

Autoguiding:
Artesky 70 mm Guidscope (f=400 mm)
ZWO ASI 120 MM mini
PhD2 (Multistarguiding)
Dither

light frames:
20 x 120 s (Ha)
15 x 120 s (OIII)

dark frames:
30 x 120 s

acquired with N.I.N.A.

Post-Processing:

PixInsight:

Ha, OIII channel:
Image calibration (dark + bias frames only), star alignment, image integration, Darkarchons EZ Processing Suite: EZ Soft Stretch

HOO combination via channel combination

HOO processing:
dynamic crop, SCNR, luminance mask, contrast/color saturation enhancement of nebula by curves transformation, darkening and desaturation of background by curves transformation, chrominance and luminance noise suppression using Multiscale Linear Transform

Topaz Denoise AI:
Noise suppression

Photoshop CS2:
Final color adjustments

Location: Schwentinental, Germany

N 1 B 64 C 0 E Aug 29, 2024 F Aug 29, 2024
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28.08.2024 (03:34 UT - 03:48 UT)

Celestron C14 Edge HD @ f=8750 mm (F/37), res = 0.07"/px
+ Celestron CGE Pro mount
+ Celestron EF
+ ZWO ASI 290 MM
+ Baader 2x VIP Barlow
+ ZWO EFW
+ Baader IR (685 nm) filter
+ Tempest Cooler
+ Omegon Dew Heater
+ Astrozap Dew Shield for C 14

Very short imaging train: I simply screwed the Baader VIP Barlow into the nose piece of the ZWO EFW. However, the small pixel size of the ZWO ASI 290 MM leads to a pixel scale of 0.07"/px at a reasonable f-ratio of f/37.

IR: 8 x SER movies
5000 frames/movie
5.2 ms exposure time, gain = 268
1x1 bin

recorded with Firecapture

Saturn 45° above the horizon
Seeing: Pickering 4-5 (poor)

Postprocessing

IR

Autostakkert!4beta:
- Stacking 25% of the frames/movie
- Image Stabilization Planet
- Quality Estimator: Laplace, Noise Robust 5, Local
- Reference Frame: Autosize
- Normalize Stack 90%
- Minimum AP size = 104, Min Bright = 45

Registax:
- wavelet sharpening using layer 2, step increment = 1

WinJUPOS:
- image measurement of IR images
- image de-rotation & stacking of all IR images

Lucien Astrosurface 3:
- apply LR deconvolution

Topaz Denoise 6:
- noise reduction

Schwentinental (Germany)

-CS Daniel

N 0 B 307 C 0 E Dec 27, 2021 F Dec 27, 2021
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Ha: 26.12.2021, 21:47 - 22:57 UT
OIII: 26.12.2021, 20:17 - 21:30 UT
SII: 26./27.12.2021, 23:05 - 00:28 UT

ZWO ASI 1600 MM Pro @ -20°C (Gain=139, Offset=21)
+ C14 & Starizona Hyperstar @ 675 mm (f/1.9)
+ Baader 2" Ha, OIII, SII filter
on CGE-Pro mount

Cable managment to mitigate diffraction spikes.

Autoguiding:
Artesky 70 mm Guidscope (f=400 mm)
ZWO ASI 120 MM mini
PhD2 (Multistarguiding)
Dither

light frames:
25 x 120 s (Ha)
26 x 120 s (OIII)
29 x 120 s (SII)

Unfortunately, I had to throw away a lot of subs due to wind gusts

dark frames:
30 x 120 s

acquired with N.I.N.A.

Post-Processing:

PixInsight:

Processing based on the HSHO workflow by Cuiv, The Lazy Geek

Ha, OIII, SII channel:
Image calibration (dark + bias frames only), star alignment, image integration, dynamic crop, dynamic background extraction according to this video by VisibleDark, Darkarchons EZ Processing Suite: EZ Softstretch

First HSHO combination via LRGBCombination with 58% weight on the green channel, remove magenta tints in the color image by image inversion and SCNR, star extraction using Starnet, delete first HSHO combination result, smooth stars by removing layers 1-2 with MLT

Star removal from non-linear Ha, OIII, SII images, second HSHO combination via LRGBCombination of starless HSO images, remove magenta tints in the color image by image inversion and SCNR

Starless HSHO processing:
curves transformation for contrast enhancement, create luminance mask, HDRMultiscaleTransform with 9 layers, contrast/color saturation/hue, b, a, c, R, G, B, enhancement of nebula by curves transformation

Sharpening of L:
not applied due to noisy image

Topaz Denoise AI:
Remove noise from starless image:
Mode: DeNoiseAI
Low Light Mode On
Sharpen: 0
Remove Noise: 25

Adobe Lightroom 6.14:
Final contrast enhancements, HSL processing of specific colors

PixInsight:
Finally, add stars to starless image using Pixelmath and apply the DarkStructureEnhance script with amount = 0.1

Location: Schwentinental, Germany


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