« on: February 28, 2014, 06:20:10 AM »
<p>As for the modification itself, it’s said it will “greatly improve dynamic range and video sharpness and performance in the EOS 5D Mark III.”</p>
Optimized PCB layout might help to get the pedestal noise down which increases DR directly. Perhaps they introduce some intelligent readout which reads the sensor twice to extend the DR by increasing the max counted photons per subpixel. Sometimes tiny alterations of PCB layout reduce "electronic dirt" on signals making them cleaner, more realistic.
Our brain disciminates very subtle changes in signals. Think about sound reproduction: I added a dipole subwoofer to my very good loud speakers and the rendering of sound below 35Hz is magic - I don't hear to much new things in that region.
Listening is much easier than before; from psychoaccoustics we know that the brain adds missing details very effectively like bass sound from higher frequencies. But I think, the brain has to do the calculation of missing details - if you add the detail you need less processing power which can be used to enjoy the music.
The same might apply to optics/cameras.
Another thought: cooling or at least stablizing the temperature to something like 20 degree celsius for sensor and ADC might help to reduce noise sources substantially.
IMHO substantially higher frame rates are not possible because the shutter mechanism will limit fps for an EOS 5D MarkIII.