Introduction
Robert Slobins:
"Solar eclipse photography is one of the most difficult tasks of astronomical photography."
There are at least three reasons for that.
- The first and main one is the extreme contrast which makes it impossible to record the phenomenon on a single image. Neither classical nor digital photography has the ability to master the brightness ratio necessary for successful eclipse photography.
- The second reason is little chance for experimentation. If anything goes wrong it may take years for a similar opportunity to arise.
- The last (but not least) reason is the fact that processing of images taken during total eclipse is very complicated and time consuming work with needs of one purpose software being developed specially for this aim.
During the last decades there was large amount of observing material obtained with great effort. This material contains valuable information on solar corona which has not yet been fully used. Fast computer processors, gigabyte-sized memories and high resolution scanners, together with newly developed mathematical methods, make possible the use of archival films to create corona images of a quality that was not attainable several years ago when these images were originally taken.
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