Images taken with Lunt LS60 or Lunt LS100 in single stack or double stack mode as indicated near the image. Using native focal length for full disk and 2/5x or 3x Barlow lens for prominence and surface detail.
Recording with ASI174. Typically 10% to 20% of 750 / 1000 / 2000 / 5000 frames stacked in AutoStakkert!3 wavelet sharpening in Registax 6 and finishing in Photoshop CS2.
Time-lapse videos with Python script and ffmpeg.
2025-05-04 17:17UT. After a long pause we have a white light image again. The AR 14079 region produced a sunspot visible to the naked eye so I wanted to image it in white light with the 4inch F8 APO.
2025-05-04 17:24UT We have a magnified close-up of the spot with the TV 2.5x Barlow.
2025-05-04 18:39UT For the same nice active region we obtain H-Alpha images as well. Special note: The H-Alpha scope block filter included a 90deg prism, so the recorded images have been flipped vertically to match the whit light appearance. Here a composit of surface and prominence exposures.
2025-05-04 18:47UT and 18:51UT Two surface detail images with the 2.5x TV Barlow
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2025-05-04 18:57UT and 18:58UT Two prominence detail images with the 2.5x TV Barlow and surface blacked out.
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2025-01-12 18:16UT. We start the 2025 campaign with a nice active Sun. Seeing was just average so not detail images with the barlow lens.
Copyright images and processing Gert Gottschalk.
Copyright Bilder und Verarbeitung Gert Gottschalk