Sun through Coronado H-alpha filters

Updated : 30 July 2005.

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sund2x007-020_PScrop.jpg (1200 kB)

  • CCD : STL11000M ABG 1x1 binning
  • Exposure time : 0.007 s
  • Date and Time : 30. July 2005, 08:04 UT
  • Instrument : FSQ @ f/13 (SM90)
  • Focal length : ca. 1200 mm (2x 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 Photoshop (unscharp mask, colorized). Best image out of 20 images graded with Imageplus V2.75. Imaged at my backyard between clouds, Mol, Belgium.

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