Sun through Coronado H-alpha filters

Updated : 28 August 2005.

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AGA_Average1000_IMG_1010_PSred.jpg (1100 kB)

  • CCD : Canon 20D Hutech mod
  • Exposure time : 1/125 s
  • Date and Time : 28. August 2005, 15:52 UT
  • Instrument : FSQ @ f/13 (SM90)
  • Focal length : ca. 1200 mm (2x Powermate)
  • FWHM : about 0.07 nm (single H-alpha filters)
  • Filters : Baader UV-IR filter
  • Image processing : Photoshop
  • Problems/comments : Further processing in Imageplus (grading) and Photoshop (unscharp mask, levels, curves, combination, colorized). Best image out many images graded with Imageplus V2.75. Imaged at my backyard between clouds, Mol, Belgium.

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