CrDeviceProperty_NDFilterPositionSetting

Get/Set the the nd filter position with a absolute value.

CrDataType: CrDataType_UInt16Range

Value	Explanation
variable	min
variable	max
variable	step

The transmittance of ND filter can be calculated as follows.

transmittance = 2 ^ ( ( （Value） - 0x7FFF ) / 0x1000 )