---
title: activeExposureSignals
framework: AVFoundation
role: symbol
role_heading: Instance Property
platforms: [iOS 27.0+, iPadOS 27.0+, Mac Catalyst 27.0+, tvOS 27.0+]
path: avfoundation/avcapturedevice/activeexposuresignals
---

# activeExposureSignals

Reports which characteristics the auto exposure system associates with the current scene. Auto exposure may adjust properties such as lens aperture size based on these factors. This property is key-value observable.

## Declaration

```swift
var activeExposureSignals: Set<AVCaptureDeviceExposureSignal> { get }
```

## See Also

### Configuring exposure signals

- [enabledExposureSignals](avfoundation/avcapturedevice/enabledexposuresignals.md)
- [supportedExposureSignals](avfoundation/avcapturedevice/supportedexposuresignals.md)
- [automaticallyEnablesExposureSignals](avfoundation/avcapturedevice/automaticallyenablesexposuresignals.md)
- [AVCaptureDeviceExposureSignal](avfoundation/avcapturedeviceexposuresignal.md)