Baily's beads 5 seconds before C2 and iridescent clouds
Mixed feelings are associated with this image. Beautiful iridescent clouds lit by the last Baily's
beads before the second contact created impressive and dramatic scenery. On the other hand in this
moment it was obvious that these clouds obscured at least partially the solar corona and that twelve
seconds of totality gave no chance for any improvement.
This HDR image
processing had to manage the brightness ratio more than 1:107. Four digital images and
one classical negative film image taken within one second were used for the brightest part of the
image. The lower light intensity the more images were used. Total number of used images is 54. The
color negative film was used because images taken on this film have no saturated part, unlike digital
camera images. That is why the use of color negative film improves the display of Baily's beads. This
strategy led to very realistic image. The only "drawback" or let me say "imperfection" is that the
lower intensity clouds are a little motion-blurred because the images are aligned on solar corona.
Fortunately the blurring of clouds is nearly imperceptible in the resulting image.
Click on the image or on the following reference to display the
higher resolution image version (1.8 MB, PNG format).
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| Image | Tse_2013_bp-07-08.jpg |
| Date | 3. 11. 2013 |
| Time | 2nd contact 14:24:46 UT, Total eclipse duration 10 s (measured) |
| Place | Kenya |
| Coordinate | N 3° 29' 42.07", E 35° 26' 46.72", Alt. 565 m |
| Conditions | Partially cloudy |
| Optics | (1) MTO 10/1000 mm
(2) 3M-5CA 8/500 mm
(3) 3M-65CA 6.3/500 mm
(4) Sky-Watcher MAK 90mm / 1250 mm |
| Camera | (1,2,3) Canon EOS 5D Mark II (ISO 100)
(4) Canon EOS 3000 N |
| Film | Fujicolor Superia X-Tra 800 |
| Exposure | (1) 1/250 s, 1/60 s,1/15 s
(2) 1/45 s, 1/15 s, 1/6 s
(3) 1/4 s, 1/1.4 s, 2 s
(4) 1/250 s |
| Processing | Composition of 54 eclipse images - 25 images (1), 22 images (2), 6 images (3), 1 image (4). Digital eclipse images were calibrated by means of large number of dark frames and flat-fields, aligned by means of phase correlation, composed by means of LDIC 5.0 software, processed using Corona 4.1 in order to visualize coronal structures. Final processing was done using ACC 6.1 software.
Image processing by Miloslav Druckmüller |
| Software | Astro D3F 2.0, PhaseCorr 6.0, LDIC 6.0, Corona 4.1, Sofo ACC 6.1 |
| Orientation | Image must be rotated 131° counter-clockwise to achieve standard orientation i. e. solar North up. |
| Copyright | © 2013 Pavel Štarha, Kristian Molnár, Shadia Habbal © 2014 Miloslav Druckmüller |
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Miloslav Druckmüller
Institute of Mathematics, Faculty of Mechanical Engineering
Brno University of Technology, Czech Republic
druckmuller@fme.vutbr.cz
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Page last update: 27.11.2019
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