This shot shows the sun with an unusual amount of
activity for a post-peak solar cycle period. The
activity was associated with a large coronal mass
ejection (CME). This was large enough to create
auroral activity which was visible farther
south than is normal for auroral displays.
This is a first attempt at shooting an H-alpha image
of the sun as well as a first attempt at
creating a false-color composite result. The
filter used was a 0.7 angstrom wide H-alpha
filter from Solarscope. This is a 50mm
aperture obstructionless filter which was
mounted on a Borg 76mm achromat refractor.
Strictly speaking, this image is also
unfortunately filtered by the smoke of numerous
brush fires currently burning in Southern
The composite was created by combining a 1/1000 sec.
exposure for the disk details, and a 1/500 sec. exposure
for the prominences, both shot on Kodak Elite
II 100 slide film. A Nikon 5005 body with a
TC201 2X teleconverter was used to increase the
system focal length to 1280mm.
Since H-alpha light is a pure red, which is hard to see
on a monitor, the red channel was copied into the green
channel and mixed to create an easier-to-see false-color
image. All processing was done in Photoshop.
Note: The horizontal band is a scanner artifact.