The subtle coronal structure can be seen during the total eclipse thanks
to human eye ability to distinguish low contrast features in extremely high
contrast image. Neither classical nor digital photography is able to reproduce
the corona image in its full contrast. Only the mathematical processing of
more images is able to make an image suitable for coronal structure study.
The main principle of this method was described on
another page. The corona image on this
page was created by using of 12 different images taken with exposures in range
1/4 s to 1/250 s.