Calcium II K images - 2023

Ca K Barr filter : 393.25 nm, FWHM = 0.26 nm, 2-cavity filter

Ca K Alluxa filter : 0.37 nm FWHM 3-cavity filter, and 1.5 A FWHM single-cavity filter

Takahashi TOA 150 mm with 65 mm or 75 mm aperture stop

9 September 2023 Alluxa Ca K DS 0.14 nm -f/7	9 September 2023 Alluxa Ca K DS 0.14 nm - f/15	24 September 2023 Alluxa Ca K DS 0.14 nm	25 September 2023 Alluxa Ca K SS 0.14 nm	25 September 2023 Alluxa Ca K DS 0.14 nm
7 September 2023 Comparison between 0.37 nm, 0.14 nm SS, 0.14 nm DS and SHG	7 September 2023 Alluxa Ca K 0.37 nm	7 September 2023 Alluxa Ca K 0.14 nm	7 September 2023 Alluxa Ca K DS 0.14 nm	7 September 2023 Alluxa Ca K DS 0.14 nm	7 September 2023 SHG Doug Smith
23 June 2023 Alluxa Ca K 0.37 nm + 0.15 nm	25 June 2023 Alluxa Ca K 0.37 nm + 0.15 nm	26 June 2023 Alluxa Ca K 0.37 nm + 0.15 nm	8 July 2023 Alluxa Ca K 0.37 nm + 0.15 nm	9 July 2023 Alluxa Ca K 0.37 nm + 0.15 nm
31 May 2023 Alluxa Ca K 0.37 nm + 0.15 nm	31 May 2023 Alluxa Ca K 0.37 nm + 0.15 nm	2 June 2023 Alluxa Ca K 0.37 nm	2 June 2023 Alluxa Ca K 0.37 nm + 0.15 nm	5 June 2023 Alluxa Ca K 0.37 nm	5 June 2023 Alluxa Ca K 0.37 nm + 0.15 nm
22 May 2023 Barr Ca K 0.26 nm	22 May 2023 Alluxa Ca K 0.15 nm	22 May 2023 Alluxa Ca K 0.37 nm + 0.15 nm	29 May 2023 Alluxa Ca K 0.37 nm	29 May 2023 Alluxa Ca K 0.37 nm	31 May 2023 Antlia 393-3nm
5 April 2023 Andover 430-1.9nm	5 April 2023 EO 430-10nm	5 April 2023 Alluxa 0.37 A Ca K	22 May 2023 Antlia 393-3nm	22 May 2023 Altair G-band 2 nm	22 May 2023 Alluxa Ca K 0.37 nm
19 Jan 2023 Comparison Antlia 393-3nm vs EO394-10nm	19 Jan 2023 Comparison Antlia 393-3nm vs Alluxa 393.4-0.15nm	5 April 2023 EO 394-10 nm	5 April 2023 K-line 396-8nm	5 April 2023 Andover 396-5nm	5 April 2023 Antlia 393-3nm

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