By using AirPlay and the video mirroring feature, you can broadcast live images / video from your iPhone’s camera directly to an Apple TV on the same network.

To do this, you’ll need iOS 5 or later, an Apple TV, and the AirPlay compatible iPhone 4S or iPad 2 with a camera. All hardware must be on the same wireless network as well. With those requirements met, here’s how to set up the live camera broadcast:

On the Apple TV:

Go to Settings > AirPlay > turn Airplay ON

From the iPhone 4S or iPad 2:

Double click the home button and swipe to the right, then tap on the AirPlay button

Select the Apple TV and enable Mirroring

Now click the Home button again and tap on the Camera app to start the live feed

Assuming you did this all correctly, the Apple TV will export whatever the iPhone camera sees live, thanks to the video mirroring feature.

This fun little trick was found on TUAW, who suggests you can use the camera mirroring feature to look at your ear or nose… LOL.

Whatever use you find for this one, have fun!