Image

The second contact

After the eclipse I was nearly sure that the 200 mm lens images were unusable for further image processing. The reason was that the wide field of view made finding images without any cloud nearly impossible. Finally I selected carefully only 9 images of totally 78 taken by means of 200 mm lens during totality. Together with 38 images taken with 500 mm lens these images enabled me to create a wide angle image which is over my expectations. The limiting magnitude is about 9 and at least 209 stars can be found on this full field of view image version.
Click on the image or on the following reference to display the higher resolution image version (1.7 MB, PNG format).

ImageTse2009e_200mm_2nd.png
Date22. 07. 2009
Time2nd contact 03:28:39 UT (total eclipse duration 5 m 41 s)
PlaceEnewetak Atoll, Marshall Islands
Coordinate11° 21.546' N, 162° 20.827' E, 3 m altitude
ConditionsPartially clear, partially small cumulus cloud,
altitude of the Sun above the horizon 56-57°
OpticsCanon 200mm 1:2.8 L II
Maksutov-Cassegrain 3M-6A, 6.3/500 mm
CameraCanon EOS 5D Hutech Ia modification (Canon 200mm lens)
Canon EOS 5D (Maksutov-Cassegrain)
Exposure1/500 s - 1 s (Canon 200mm lens)
1/250 s - 8 s (Maksutov-Cassegrain)
ProcessingComposition of 9 images (Canon 200mm lens) and 38 (Maksutov-Cassegrain) eclipse images. Eclipse images calibrated by means 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
SoftwareAstro D3F 2.0, PhaseCorr 6.0, MPA 1.0, LDIC 5.0, Corona 4.1, Sofo ACC 6.1
Copyright© 2009 Miloslav Druckmüller, Peter Aniol
 


Miloslav Druckmüller
Institute of Mathematics, Faculty of Mechanical Engineering
Brno University of Technology, Czech Republic
druckmuller@fme.vutbr.cz
Page last update: 7.4.2013