---
title: nominalFocalLengthIn35mmFilm
framework: avfoundation
role: symbol
role_heading: Instance Property
path: avfoundation/avcapturedevice/nominalfocallengthin35mmfilm
---

# nominalFocalLengthIn35mmFilm

The nominal 35mm equivalent focal length of the capture device’s lens.

## Declaration

```swift
var nominalFocalLengthIn35mmFilm: Float { get }
```

## Discussion

Discussion This value represents a nominal measurement of the device’s field of view, expressed as a 35mm equivalent focal length, measured diagonally. The value is similar to the FocalLengthIn35mmFormat EXIF entry (see kCGImagePropertyExifFocalLenIn35mmFilm) for a photo captured using the device’s format where isHighestPhotoQualitySupported is true or when you’ve configured the session with the photo preset. This property value is 0 for virtual devices and external cameras.