Comments
Please note that the colours are "false". Although the image was acquired using a digital colour camera, my particular solar filter renders the Sun a rather neutral white, and for purely aesthetic reasons I chose to make the Sun look yellow. The image was given this particular hue, determined by my subjective mind, through computer software.
Close to the centre there are several faint and fuzzy arches. These are due to dust on the image sensor.
Some technical notes
| Location | Lund, Sweden, 13d East, 56d North |
| Optics | Celestron 750 mm focal length telephoto lens (special version of the C5 telescope optics, 1970's vintage), stopped down with an off-axis solar filter |
| Solar filter | Baader AstroSolar |
| Mount | Fixed camera tripod |
| Imaging device | Canon EOS 20D |
| Exposure time | 1/500 s |
| ISO setting | 800 |
| Imaging method | 3 frames manually selected and stacked |
| Stacking software | RegiStax 6 |
| Post processing software | GIMP 2.6.6 |
Comments and suggestions are welcome. Send e-mail to bengt@df.lth.se
Image and text copyright © 2012 Bengt Ask.