---
title: HMCharacteristicTypeOpticalZoom
framework: homekit
role: symbol
role_heading: Global Variable
path: homekit/hmcharacteristictypeopticalzoom
---

# HMCharacteristicTypeOpticalZoom

The optical zoom setting of the camera sourcing a video Real-time Transport Protocol (RTP) service.

## Declaration

```swift
let HMCharacteristicTypeOpticalZoom: String
```

## Discussion

Discussion The corresponding value is a floating point number representing the optical zoom setting of the camera.

## See Also

### Audio and video

- [HMCharacteristicTypeSupportedRTPConfiguration](homekit/hmcharacteristictypesupportedrtpconfiguration.md)
- [HMCharacteristicTypeDigitalZoom](homekit/hmcharacteristictypedigitalzoom.md)
- [HMCharacteristicTypeImageMirroring](homekit/hmcharacteristictypeimagemirroring.md)
- [HMCharacteristicTypeImageRotation](homekit/hmcharacteristictypeimagerotation.md)
- [HMCharacteristicTypeNightVision](homekit/hmcharacteristictypenightvision.md)
- [HMCharacteristicTypeStreamingStatus](homekit/hmcharacteristictypestreamingstatus.md)
- [HMCharacteristicTypeSupportedVideoStreamConfiguration](homekit/hmcharacteristictypesupportedvideostreamconfiguration.md)
- [HMCharacteristicTypeSupportedAudioStreamConfiguration](homekit/hmcharacteristictypesupportedaudiostreamconfiguration.md)
- [HMCharacteristicTypeSelectedStreamConfiguration](homekit/hmcharacteristictypeselectedstreamconfiguration.md)
- [HMCharacteristicTypeSetupStreamEndpoint](homekit/hmcharacteristictypesetupstreamendpoint.md)
- [HMCharacteristicTypeAudioFeedback](homekit/hmcharacteristictypeaudiofeedback.md)
- [HMCharacteristicTypeVolume](homekit/hmcharacteristictypevolume.md)
- [HMCharacteristicTypeMute](homekit/hmcharacteristictypemute.md)
- [HMCharacteristicTypeVolumeSelector](homekit/hmcharacteristictypevolumeselector.md)
- [HMCharacteristicTypeVolumeControlType](homekit/hmcharacteristictypevolumecontroltype.md)