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Sun close up of AR4179 and 4180 in CaK 12th of August 2025

Sun close up of AR4179 and 4180 in CaK 12th of August 2025 by Arne Danielsen

Equipment item: filter.

Showing 1-4 of 4

Topics		Participants	Replies	Views	Created
	Filters in a Bortle 2 (nearly Bortle 1) Site Optolong L-eNhance Astrodon SII 3nm Acquisition +2 Jerry Gerber Last post: JohnHen		10	610	Jun 29, 2023
	Sell Astrodon narrowband filters Ha-5nm, OIII-3nm, SII-3nm in 31mm Astrodon H-alpha 5nm Astrodon OIII 3nm Astrodon SII 3nm +2 Florian_Neumann-Pieper Last post: Florian_Neumann-Pieper		4	649	Aug 25, 2022
	Sell Atik 383l+ with ZWO 8x31mm filter wheel with Astrodon LRGB HSO 31mm filter Astrodon H-alpha 5nm Astrodon OIII 3nm Astrodon SII 3nm +2 Florian_Neumann-Pieper Last post: Florian_Neumann-Pieper		9	1.4k	Jul 13, 2022
	Conversion of Astrodon filters from 1.25 to 31mm by Optical Structure, One filter destroyed Astrodon SII 3nm Equipment Filters +1 Erik Guneriussen		0	81	Sep 17, 2020

Showing 1-4 of 4