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# focalBlurRadius

The maximum amount of blurring, in pixels, applied to areas outside the camera’s depth of field. Animatable.

```
var focalBlurRadius: CGFloat { get set }
```

## Discussion

The default value of this property is `0.0`, disabling the depth of field visual effect. Changing this property to a nonzero value enables the depth of field effect, in which only objects at a specified distance from the camera appear in sharp focus, and objects nearer to or farther from the camera appear increasingly blurred (up to the amount specified by this property).

You can animate changes to this property’s value. See [Animating SceneKit Content](/documentation/SceneKit/animating-scenekit-content).

---

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