this post was submitted on 26 Dec 2023
46 points (97.9% liked)

Astrophotography

1814 readers
56 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 1 comments
sorted by: hot top controversial new old
[–] lefty7283 3 points 11 months ago

Figured today is an appropriate day to post this. This nebula is also known as NGC 2264 I'm fairly certain the christmas tree is the entire nebula when the photo is inverted, and not just the cone nebula at the very end of it. Captured on November 17th, 2022, from a Bortle 4 zone.

Places where I host my other images:

Flickr | Instagram |


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-290mc for guiding

  • Moonlite Autofocuser

Acquisition: 4 hours 2 minutes (Camera at half unity gain, -15°C)

  • L- 62x120"

  • R- 20x120"

  • G- 20x120"

  • B- 19x120"

  • Ha -47x300" x 2 panels

  • Darks- 30

  • Flats- 30 per filter

Capture Software:

  • Captured using N.I.N.A. and PHD2 for guiding and dithering.

PixInsight Processing:

  • BatchPreProcessing

  • SubframeSelector

  • StarAlignment

  • Blink

  • ImageIntegration

  • DrizzleIntegration (2x, Var β=1.5)

Linear:

  • DynamicCrop

  • automaticBackgroundExtraction

  • EZ Decon

  • NoiseXTerminator

Stretching Luminance:

  • MaskedStretch to 0.1 background

  • Starnet++ starmask made, subtracted from 0.3 Gray image and colvolved

  • Previous image used as a mask to stretch nebulosity without stretching stars

  • Normal HistogramTransformation

RGB Linear:

  • Channelcombination to combine monochrome images into RGB image

  • SpectroPhotometricColorCalibration

  • SCNR green

  • HSV Repair

  • ArcsinhStretch + HT to bring nonlinear

Nonlinear:

  • LRGBCombination with stretched luminance

  • Shitloads of CurveTransformations to adjust lightness, saturation, contrast, hues, etc.

  • Extract L --> LRGBCombination for chrominance noise reduction

  • More curves

  • SCNR to remove some background greens

  • LocalHistogramEqualization

Two rounds of this. one at size 16 for the finer 'feathery' details and one at size 500 for large scale structures

  • ColorSaturation

  • even more curves

  • NoiseXTerminator

  • EZ Star Reduction

  • noise generator to add noise back into star reduced areas

  • MLT for chrominance noise reduction

  • Resample to 60%

  • Annotation