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Smallest step by which the exposure compensation can be changed.
This is the unit for CaptureRequest.ControlAeExposureCompensation. For example, if this key has a value of 1/2, then a setting of -2 for CaptureRequest.ControlAeExposureCompensation means that the target EV offset for the auto-exposure routine is -1 EV.
One unit of EV compensation changes the brightness of the captured image by a factor of two. +1 EV doubles the image brightness, while -1 EV halves the image brightness.
Units: Exposure Value (EV)
This key is available on all devices.