Interesting and beautiful picture.
However, if it is true that the dynamic range of that particular scene was "brightness range of over 10,000 to 1", that means LOG(10000)/LOG(2)=13,29 f-stops of DR. I cannot see then any need for 28 captures. Just 3 of them, 3 f-stops apart would have sufficed with any of our digital cameras.
Looking at the texture of the moon compared to the solar radiance I think the 10000:1 ratio is quite wrong, and the real contrast was higher.