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The range of scene distances that are in sharp focus (depth of field).
If variable focus not supported, can still report fixed depth of field range
Units: A pair of focus distances in diopters: (near, far); see CameraCharacteristics.LensInfoFocusDistanceCalibration for details.
Range of valid values:
>=0
Optional - This value may be null on some devices.
Limited capability - Present on all camera devices that report being at least CameraMetadata.INFO_SUPPORTED_HARDWARE_LEVEL_LIMITED devices in the CameraCharacteristics.InfoSupportedHardwareLevel key