this post was submitted on 14 Aug 2024
25 points (100.0% liked)

Astrophotography

1621 readers
1 users here now

Welcome to !astrophotography!

We are Lemmy's dedicated astrophotography community!

If you want to see or post pictures of space taken by amateurs using amateur level equipment, this is the place for you!

If you want to learn more about taking astro photos, check out our wiki or our discord!

Please read the rules before you post! It is your responsibility to be aware of current rules. Failure to be aware of current rules may result in your post being removed without warning at moderator discretion.

Rules




If your post is removed, try reposting with a different title. Don't hesitate to message the mods if you still have questions!


founded 1 year ago
MODERATORS
 
top 2 comments
sorted by: hot top controversial new old
[–] lefty7283@lemmy.world 3 points 4 weeks ago

It may not be as big or well known as the other well known cluster in Hercules (M13), but it sure looks nice. Captured over 4 nights in July/August 2024 from a Bortle 9 zone

Places where I host my other images:

Instagram | Flickr


Equipment:

  • TPO 6" F/4 Imaging Newtonian

  • Orion Sirius EQ-G

  • ZWO ASI1600MM-Pro

  • Skywatcher Quattro Coma Corrector

  • ZWO EFW 8x1.25"/31mm

  • Astronomik LRGB+CLS Filters- 31mm

  • Astrodon 31mm Ha 5nm, Oiii 3nm, Sii 5nm

  • Agena 50mm Deluxe Straight-Through Guide Scope

  • ZWO ASI-120MC for guiding

  • Moonlite Autofocuser

Acquisition: 6 hours 55 minutes (Camera at half Unity Gain, -15°C)

  • Lum - 209x60"

  • Red - 78x60"

  • Green - 62x60"

  • Blue - 66x60"

  • Flats- 30 per filter

  • 24 JimmyFlats per filter

Capture Software:

PixInsight Processing:

  • BatchPreProcessing (with premade JimmyFlats)

  • StarAlignment

  • Blink

  • ImageIntegration

  • DrizzleIntegration (2x, Var β=1.5)

  • DynamicCrop

  • DynamicBackgroundExtraction

duplicated each image and removed stars via StarXterminator. Ran DBE with a shitload of points to generate background model. model subtracted from original pic using the following PixelMath (math courtesy of /u/jimmythechicken1)

$T * med(model) / model

Luminance:

  • BlurXTerminator (correct only mode)

  • ArcsinhStretch + histogramtransformation to bring nonlinear

RGB:

  • ChannelCombinaiton to combine monochrome R, G, B stacks into color image

  • BlurXTerminator (correct only mode)

  • SpectroPhotometricColorCalibration

  • HSV Repair

  • ArcsinhStretch + histogramtransformation to bring nonlinear

  • Curves to saturate it a little

  • MLT for large scale chrominance noise reduction

Nonlinear:

  • LRGBCombination with stretched L as luminance

  • DeepSNR Noise reduction

  • Several CurveTransformations to adjust lightness, contrast, colors, saturation, etc.

  • Invert > SCNR > invert > SCNR to remove some greens and magentas

  • More curves

  • A little bit of noiseXterminator

  • DynamicCrop in on the clustert

  • Resample to 75%

  • Annotation

[–] IMALlama@lemmy.world 3 points 4 weeks ago

This deserves more attention! Great image! Thanks for sharing and taking the time to type out how you were able to capture it.