This was my first attempt at creating a mosaic of the sun. The image below is composed from approximately 20 images across the surface of the sun.  Processing this type of Hydrogen Alpha image is very, very painful. It is extremely hard to get consistent colour, clarity and luminance across the whole image. Mosaics tend to add artifacts at the overlap points which show up dramatically especially in the background. My initial attemps looked like a patch work quilt, but after many attempts I have something usable. Assembling and processing the images to get this final image took me about 6 hours. I don't think I will do this too often :-)

The image was assembled from about 30 images Including the separate exposures needed for the prominances around the outside. Warning this image is BIG. The full size image is approximately 3500x3200 and is about 1.4mb. I have not included the full size tiff version here as it is 65megabytes.

For those that are on slower connection I have included a half size version that is about 450kb. The one on the left is the smaller one the one on the right is 1.4mb.