|Eclipse - Turquey 29th March 2006|
|An opportunity to enjoy 3 minutes 50 secondes of magie and discover a new country...
French version here
Turquie: Gundogdu Beldesi Dikilitas close to the city of Side
Our observation site was quasi ideal, not far from the beach, a little bit higher than the sea level. It permitted us to bring the car close to the instruments. Some of us could even benefit from electricity thanks to a close restaurant which allowed us to plug in on the main.
The map of the eclipse and the animation of the phenomena to prepare the eclipse are visible here
About 3 minutes 50 secondes of totality... and so little time to do everything: video, telescope views, and large field images, without forgetting to look with my own eyes... some stressfull but absolutly magic experience.
The total duration of the phenomena is about 3 hours. The eclipse begins with a partial phase. The moon covers the sun disk little by little, the luminosity decrease and this decrease becomes clearly perceptible about 45 minutes before the totality. As the moon starts to completely cover the sun, this is the start of the totality phase with the apparition of the diamond. Then, the corona appears, this is the magic moment, the inner coronna and the external corona appear. The time is running... 3 minutes and few secondes later the exit diamond notifies the end of the totality. Time to put back the filter to continue to observe the final partial phase.elle finale.
The solar corona
Inner corona, beginning of the totality
Different phase and exposure duration during the totality
Beginning of the totality (images are rotated -90°)
End of the totality phase
The Nikon D70 does not react well to overexposition. Serious blooming affects the surrounding pixels.
Iner corona images, toward the end of the totality
Coments on the operations
Continous movie during totalty: small workload, the sound recorded gives back a little bit of the impressive vision too. Manual exposure variation allows to voer the different part of the corona. It would have been interested to do that more slowly, but I had plenty of other things to do...
Ambiance movie: big mistake - the reference for the luminosity was taken way to early at the beginning of the partial phase. The camcorder was then left in manual exposure so during hte totality phase the imaages was completely dark... this was a big surprise compared to my previous eclipses (1998 and 1999)
Telescope images: the big risk was the vibrations with a so small mounting and a heavy digital camera attached to a small refractor, and not at the gravity center. Vibrations were probably correctly amortized with choice of a wood interface plate to attach the instruments to the equatorial mount. It allows me to take reasonable sharp images even at exposures of 1/60s and below. See below the table of the exposure taken with time and exposure duration. 23 images have been taken. Biggest probel encountered: night was so dark that I could not read the exposure on the LC screen when changing time, I had to light on the screen manipulating several camera buttons. The fun part is that my hand light was ready and close to me on the photo bag, but that's eclipse time... Next time I will proably work on an automatic script to take the exposures, because it will give me more time to look at the sun instead at the digital camera...
Large field images: taken during the second-half of the totality phase, framing view was prepared during the partial phase few minutes before the totality. The sun height was about 54° and a specific focal reducer add-on was required to get the ground and the sun. The image quality was not too bad. Only the Venus planet was visible, not Mercure.
Partial phase images: After all, this is not the most interesting part... the images were taken every 5 minutes and this was largely enought. I decided to take also video shots, which is in fact redondant. I had an intervallometer on the camcorder but decided not to use it to protect the battery duration.
Ton pursue the discovery of this eclipse, some very interesting links
A little bit of science with Alain Klotz, participant of our expedition - Eclipse Turquie et Spectroscopie
Exceptional image and polarisation study of the corona with Christian Buil - Eclipse Turquie du 29 Mars 2006
The notes from a french scientific group in Egypt, from IAP, led by Serge Kouchmy assisted with few amateurs - Egypte 2006
the totality video was performed with a sony DCR-HC90E. The one of ambiant light with a Sony DCR-TRV7E
An eclipse in a foreign country is always the opportunity to discover a little bit of the History. Turquey is a great and rich country for this.