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# isSmoothAutoFocusEnabled

A Boolean value that indicates whether smooth autofocus is in an enabled state on the device.

```
var isSmoothAutoFocusEnabled: Bool { get set }
```

## Discussion

On capable devices, you can enable a focusing mode in which the camera makes lens movements more slowly. This mode make focus transitions less visually intrusive, a behavior that you may want for video capture.

Before changing the value of this property, you must call [`lockForConfiguration()`](/documentation/AVFoundation/AVCaptureDevice/lockForConfiguration()) to acquire exclusive access to the device’s configuration properties. Otherwise, setting the value of this property raises an exception. When you finish configuring the device, call [`unlockForConfiguration()`](/documentation/AVFoundation/AVCaptureDevice/unlockForConfiguration()) to release the lock and allow other devices to configure the settings.

---

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