---
title: fNumber
framework: cinematic
role: symbol
role_heading: Instance Property
path: cinematic/cnscript-1ispe/fnumber
---

# fNumber

The f-stop value which inversely affects the aperture used to render the Cinematic image.

## Declaration

```swift
final var fNumber: Float { get set }
```

## Discussion

Discussion Pass this to the rendering session in the rendering frame attributes to match the selected aperture. Change this property when the user selects a different aperture for the edited movie. Reflect script changes for later restoration by making changes to this property.