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# highResolutionStillImageDimensions

The highest resolution still image the system can produce for this format.

```
var highResolutionStillImageDimensions: CMVideoDimensions { get }
```

## Discussion

Normally, the [`AVCaptureStillImageOutput`](/documentation/AVFoundation/AVCaptureStillImageOutput) class emits images with the same dimensions as the source [`AVCaptureDevice`](/documentation/AVFoundation/AVCaptureDevice) instance’s [`activeFormat`](/documentation/AVFoundation/AVCaptureDevice/activeFormat). However, if you set `highResolutionStillImageOutputEnabled` to <doc://com.apple.documentation/documentation/Swift/true>, [`AVCaptureStillImageOutput`](/documentation/AVFoundation/AVCaptureStillImageOutput) emits still images with its source [`AVCaptureDevice`](/documentation/AVFoundation/AVCaptureDevice) instance’s `activeFormat.highResolutionStillImageDimensions` dimensions.

---

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