I am fixing to format CHDK on a Sandisk Ultra II 4 GB card and would like to know if when using the SX10 built-in flash and selecting the shutter-speed override function in CHDK if setting the shutter speed at 1\1000 will the intensity of the built-in flash diminish or weaken at this speed or higher ?
I also have the Speedlite 270EX and i dont know what effect it will have on the Speedlite.
Thanks for any replys.
