Sun through Coronado H-alpha filters

Updated : 7 August 2005.

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AGA_Average1000_SUN4XD025V3-005crop_PS.jpg (1100 kB)

  • CCD : STL11000M ABG 1x1 binning
  • Exposure time : 0.025 s
  • Date and Time : 3. August 2005, 08:02 UT
  • Instrument : FSQ @ f/26 (SM90)
  • Focal length : ca. 2400 mm (4x Powermate)
  • FWHM : about 0.05 nm (double stacked H-alpha filters)
  • Filters : Astronomik clear filter, Coronado H-alpha filter
  • Image processing : MAxim V4.11 (image acquisition)
  • 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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