The LIDAR sensor calculates distance by transmitting an eye safe beam towards a target and then measuring the time it takes to return when it is reflected back. This process, known as Time Of Flight, produces an accurate measurement with an effective range of between 2 cm and 12 metres and has the advantage of being able to be used in low and even no light situations.The AFX uses this measurement to automatically move the lens on your camera to the relevant position for that distance thereby adding a centre point continuous autofocus capability to cameras that do not provide it and also, with the use of optional Tilta NucleusN or M motors, to manual focus lenses.