Full-disk images - 2025
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 0.14 nm FWHM single-cavity filter
Takahashi TOA 150 mm
with 65 mm or 75 mm aperture stop
 30 August 2025 Lunt 40 DS - IMX53 |
 30 August 2025 Lunt 40 SS - IMX585 |
 Sampling comparison: RP/2.8 and RP/3.6 |
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 3 July 2025 Spider transit.mp4 Spider transit.gif |
 13 August 2025
393-3 nm |
 13 August 2025
Barr Ca K 0.26 nm |
 13 August 2025
Ca K 0.14 nm |
 13 August 2025
Ca K 0.14 nm DS |
 30 August 2025 Lunt 40 SS |
 15 May 2025 Ha |
 Comparison 14 bits vs 8 bits |
 2 July 2025 Ca K 0.14 nm SS |
2 July 2025
Ca K 0.14 nm DS |
3 July 2025 Ca K 0.14 nm SS |
3 July 2025 Ca K 0.14 nm DS |
