The Chronos 1.4 High speed camera is getting a sensor firmware upgrade or “Wavetable” that allows for up to 38,565 fps at 336×96 pixels in windowed mode. This effectively allows the camera to go below the previous 640 pixel locked horizontal resolution which allows for even faster capture speeds.
You will not have HD resolution in these modes as you are dropping horizontal and vertical resolution to read the windowed part of the sensor. Most high speed cameras do this to allow for extremely fast frame rates while preserving the ability of the limited data rate in hardware to cope with them. The upgrade will ship with all Early Bird and the rest of the Chronos 1.4 cameras going forward.