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The Elephant Trunk in SHO by James

Imaging ionized sulfur emission at 672nm.

Showing 1-24 of 24

	Replies	Views	Created
Is it a mistake to combine Ha-oiii 12nm with oiii-Sii 6nm filters? Acquisition Duo-Narrowband H-alpha +5 Gabriel Last post: Gabriel	6	153	Oct 18, 2025
Advice on duo-band filter selection for astrophotography setup Filters Acquisition Duo-Narrowband +4 cafuego Last post: cafuego	13	215	Aug 31, 2025
Should I utilize Sii data for Crescent Nebula? If so, what are some good ways. Processing Narrowband SII +2 Paul Macias Last post: Oscar	3	146	Aug 21, 2025
How to separate channels from the Antlia Quad Band in PI Antlia Quad Band Anti-Light Pollution Filter 2" Mounted Narrowband OIII +2 Keith Geissler Last post: Franklin Marek	8	410	Dec 31, 2024
Strange noise on images... Could this be dew? Acquisition SII OIII +1 Harry Karamitsos Last post: Jared Willson	25	646	Oct 12, 2024
1st Mono Imaging Session Help Please ZWO ASI2600MM Pro Pleiades Astrophoto PixInsight SII +1 Vinny Vent Last post: Vinny Vent	8	263	Aug 18, 2024
Antilia ALP-T over exposing the red channel Antlia ALP-T Dual Band 5nm 2"Filters SII Ed Litoborski Last post: Michael Nemetz	7	430	Jan 18, 2024
Is it me, or is it [SII]? Processing SII Narrowband +2 Brian Boyle Last post: Gary Seven	7	545	Oct 24, 2023
What is this trail !!! ??? SII Narrowband Sh2-155 Philippe Lemaitre Last post: Ralph MacDonald	34	1.2k	Sep 21, 2023
Bloated Star Halos in stacked S2 - Pixinsight Pleiades Astrophoto PixInsight ZWO ASI6200MM Pro SII +2 MeridianSkyAstronomy Last post: Kjpc85	15	1k	Sep 15, 2023
Large halo around target after stacking Pleiades Astrophoto PixInsight Processing SII +2 Chase Davidson Last post: Chase Davidson	2	234	Aug 15, 2023
How to tell if there is Sii in a region? Acquisition SII Narrowband +1 Jeffrey Horne Last post: Tareq Abdulla	32	1.8k	Jul 19, 2023
Feedback requested on Ced214 - Heart of the Question Constructive Critique Requested SHO Narrowband H-alpha +2 David Payne Last post: David Payne	2	52	Jul 16, 2023
Chroma narrowband for f/3 telescopes Equipment Filters Narrowband +2 Dan Brown Last post: Torben van Hees	8	437	Jun 15, 2023
Looking for your opinion/thoughts? SII Narrowband Off-topic Sean van Drogen Last post: Bob Lockwood	5	141	Jun 11, 2023
Need help identifying nebulae in immediate vicinity (14' radius) of Beta Cen H-alpha SII Alexandr Zaytsev Last post: Ben	14	1.6k	Apr 9, 2023
New antlia sii and h beta 5nm filter. Useful? Equipment SII OIII +1 Anderl Last post: Tim Hawkes	10	730	Feb 2, 2023
Why Sii frames have this ? ZWO ASI294MM Pro Acquisition SII +2 Ahmed Alqallaf Last post: Arun H	10	603	Dec 22, 2022
Sulfur in RGB pallet Processing SII Narrowband +1 Blaine Gibby Last post: kuechlew	7	302	Sep 15, 2022
Issues with Star Alignment using Chroma Filters Equipment Narrowband SII +2 William Gottemoller Last post: Brian Puhl	13	666	Dec 20, 2021
Zwo 294 MC pro - FLATS ZWO ASI294MC Pro Gradient Removal SII Astrosingh Last post: Astrosingh	6	242	Aug 26, 2021
Conversion of Astrodon filters from 1.25 to 31mm by Optical Structure, One filter destroyed Astrodon SII 3nm Equipment Filters +1 Erik Guneriussen	0	83	Sep 17, 2020
Narrow band pains Altair Astro 183 M/C Hypercams SII Narrowband Roger Wilkinson	0	11	Aug 10, 2020
Cocoon Nebula NB SF Bay Area Imagers Narrowband H-alpha SII +2 Jim Brown Last post: Jim Brown	9	257	Sep 6, 2017

Showing 1-24 of 24