On August 1, 2008 a total solar eclipse occurred in the nothern hemisphere. Photographer Hartwig Luethenis is a true leader in the field of high dynamic range imaging. He used 28 exposures of the eclipse at different lighting intervals, resulting in an image that shows the full corona around the sun as well as the surface of the moon. Not only did he post his amazing photo on Nasa’s Astronomy Picture of the Day website, but he also wrote a tutorial about how it was made.
For another great tutorial on taking hdr pictures of an eclipse there is Catching the Light by Jerry Lodriguss.