The gurus of CHDK found a way to override shutter speeds to now include up to
1/10,000 of a second, so far. Test results show that they may get well over
1/40,000 of a second and more when all is done.

The best part? High-speed flash sync's perfectly with at all shutter speeds up
to and including the fastest ones implemented. It also allows full use of your
widest apertures. No more crippling your camera to only using high shutter
speeds with small f-stops.

Someone just posted images of drops in a sink taken with full room lighting on
and the flash in sync at 1/10,000th of a second shutter speed at f/3.5. The
first high-speed photography ever done looking exactly as if it was taken with
available light.

Check the new CHDK forum for further details.

http://chdk.setepontos.com/index.php