Chart shows the response of the Q453 to varying exposures using a lightbox as the source. Values are max pixel value in a 10x10 pixel area from central portion of a single raw frame, with exposures from .01 sec to 1000 sec. Since the color of the lightbox is very red, only the red pixels are selected in this manner.

From noise floor to saturation, the dynamic range is about 12+ stops, equivalent to about 9+ star magnitudes.