(Click to enlarge)
First try of Canon Rebel XT on my GSO 200mm f/4. The Baader MPCC really seemed to work well and the coma appears to be corrected over the full chip. There was some vignetting but it wasn't severe and flat fielded out easily. I processed this image with Deep Sky Stacker.
A full size version is also available and you can examine it to see that the coma correction appears to be working quite well.