---
title: kIOVideoFeatureControlClassIDIris
framework: Kernel
role: symbol
role_heading: Enumeration Case
platforms: [macOS 10.12+]
path: kernel/1646200-anonymous/kiovideofeaturecontrolclassidiris
---

# kIOVideoFeatureControlClassIDIris

## Declaration

```occ
kIOVideoFeatureControlClassIDIris = 'iris'
```

## Discussion

Discussion A IOVideoFeatureControl that controls a mechanical lens iris. The units for the control's absolute value are an F number (F).