High resolution image of inner corona

This image is, up to now, definitely the best maximum type solar corona image in MMV-project archive with respect to resolution and overall image quality. The fantastic sharpness of the image you may rate on the full resolution image. Faint stars are of one pixel size and some of them are nearly of 11 mag. The sharpness is the result of excellent optics, perfect focusing, nearly no vibrations during the exposure, perfect sub-pixel image alignment and excellent Nikon D7100 camera. Nikon D7100 has no low-pass filter unlike Canon DSLR cameras and therefore it gives significantly sharper images.

Click on the image or on the following reference to display the higher resolution image version (2.2 MB, PNG format).

Date3. 11. 2013
Time2nd contact 13:52:40 UT, total eclipse duration 65 s
Place50 km far from Lambarene, Gabon
CoordinateS 0° 22' 47",   E 10° 20' 43",  Alt. 78 m
ConditionsClear sky in the vicinity of the Sun (solar altitude above the horizon: 45°)
OpticsTakahashi FSQ 106N
CameraNikon D7100
Exposure1/2000 s - 2 s (ISO 100) - computer control Solar Eclipse Maestro
ProcessingComposition of 66 eclipse images. 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
SoftwareAstro D3F 2.0, PhaseCorr 6.0, LDIC 6.0, Corona 4.1, Sofo ACC 6.1
NoteThe graph above the table shows the average values of the relative number of sunspots in which the red line indicates the time of 2013 eclipse. Data from the World Data Center for the sunspot index, (Solar Influences Data Analysis Center, the Royal Observatory of Belgium) were used.
Copyright© 2013 Constantinos Emmanoulidis, © 2014 Miloslav Druckmüller

Miloslav Druckmüller
Institute of Mathematics, Faculty of Mechanical Engineering
Brno University of Technology, Czech Republic
Page last update: 27.11.2019