Dr Druckmüller discusses the need for flat fields for normalize images in his instructions for TSE 2009.
I am familiar with taking dawn/dusk flats but this is something else altogether. Other than flipping a piece of white cloth over the end of the scope, does anyone have a clue how to make flat field images right after the eclipse? It seems that anything one would do would have very poor uniformity. I have an EL panel but that would be a challenge to use in middle of the day.