To preserve the highlights, do you think we could make different readouts of the pixels at let's say T and T/2 ?
It seems to be only a firmware update away. The electronic is there already, as it is used what is used in LiveView-AF mode already.
loic
Your description sounds a lot like the DualISO module to me: http://www.magiclantern.fm/forum/index.php?topic=7139.0 (http://www.magiclantern.fm/forum/index.php?topic=7139.0)