The mottled appearance of the sun is due to clouds. I was shooting through moderate cloud cover at this point in the event. Note that the sun was also only about 13 degrees above the horizon, with attendant seeing problems. I'm lucky I got this good an image!
Scope: 8" f10 LX200, prime focus, with 3" off axis solar filter, operating at 2000mm f/l.
Capture device: ATI All In Wonder Pro video card at 640 by 480 resolution
Seeing was moderately awful, with the sun only 11 degrees off the horizon at the start of the event.