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# fieldOfView

The camera’s field of view, in degrees.

```
var fieldOfView: Float { get set }
```

## Discussion

Field of view is an angle that determines the extent of the scene visible to the camera. A small field of view angle provides a narrow view, and a large field of view provides a wide view. A very wide field of view results in distorted perspective.

In a physically based camera, field of view is based on the focal length of the lens and the vertical aperture of the imaging surface (film or sensor). Changing the [`focalLength`](/documentation/ModelIO/MDLCamera/focalLength) or [`sensorVerticalAperture`](/documentation/ModelIO/MDLCamera/sensorVerticalAperture) property updates the [`fieldOfView`](/documentation/ModelIO/MDLCamera/fieldOfView) property to the corresponding value, and vice versa.

The default field of view is 54 degrees, corresponding to a focal length of 50mm and a vertical sensor aperture of 24mm.

---

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