The maximum zoom factor allowed in the current capture configuration.
- iOS 11.0+
On single-camera devices, this value is always equal to the device format's
video value. On a dual-camera device, the allowed range of video zoom factors can change if the device is delivering depth data to one or more capture outputs.
video property to (or calling the
ramp(to method with) a value greater than the device format's
video value always raises an exception. Setting the video zoom factor to a value between the maximum available zoom factor and the device format's maximum clamps the zoom setting to the maximum available value.
This property is key-value observable.