Hobbypower PX4FLOW V1.3.1 Optical Flow Sensor Smart Camera for PX4 PIXHAWK Flight Control PX4Flow is an optical flow smart camera. It has a native resolution of 752x480 pixels and calculates optical flow on a 4x binned and cropped area at 250 Hz (bright, outdoors), giving it a very high light sensitivy Unlike many mouse sensors, it also works indoors and in low outdoor light conditions without the need for an illumination LED at 120 Hz (dark, indoors).