```
public final class AVCaptureAutoFocusSystem
extends java.lang.Object
```
[@enum] AVCaptureAutoFocusSystem Constants indicating the autofocus system. [@constant] AVCaptureAutoFocusSystemNone Indicates that autofocus is not available. [@constant] AVCaptureAutoFocusSystemContrastDetection Indicates that autofocus is achieved by contrast detection. Contrast detection performs a focus scan to find the optimal position. [@constant] AVCaptureAutoFocusSystemPhaseDetection Indicates that autofocus is achieved by phase detection. Phase detection has the ability to achieve focus in many cases without a focus scan. Phase detection autofocus is typically less visually intrusive than contrast detection autofocus.

Class AVCaptureAutoFocusSystem