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# isAutoVirtualDeviceFusionEnabled

A Boolean value that specifies whether to use automatic virtual-device image fusion.

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

## Discussion

When [`isAutoVirtualDeviceFusionEnabled`](/documentation/AVFoundation/AVCapturePhotoSettings/isAutoVirtualDeviceFusionEnabled) and [`isVirtualDeviceFusionSupported`](/documentation/AVFoundation/AVCapturePhotoOutput/isVirtualDeviceFusionSupported) are true, the framework may fuse constituent camera images of a virtual device to improve still image quality, depending on the current zoom factor, light levels, and focus position. You can determine whether virtual device fusion is enabled for a particular capture request by inspecting the [`isVirtualDeviceFusionEnabled`](/documentation/AVFoundation/AVCaptureResolvedPhotoSettings/isVirtualDeviceFusionEnabled) property of [`AVCaptureResolvedPhotoSettings`](/documentation/AVFoundation/AVCaptureResolvedPhotoSettings).

The default value for this property is true, unless you’re capturing a RAW photo or a bracket using [`AVCapturePhotoBracketSettings`](/documentation/AVFoundation/AVCapturePhotoBracketSettings).

> Note:
> When using the deprecated ``doc://com.apple.avfoundation/documentation/AVFoundation/AVCaptureStillImageOutput`` interface with a virtual device, ``doc://com.apple.avfoundation/documentation/AVFoundation/AVCapturePhotoSettings/isAutoVirtualDeviceFusionEnabled`` is always enabled, if supported.

---

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