November 21, 2012, 4:15 PM — Here's a very quick way to focus the camera in iOS on your iPod Touch, iPad, iPad mini or iPhone.
1. Tap the screen where you want to focus.
2. Your iOS device will focus on that spot.
3. Your camera will also adjust the exposure and white balance automatically.
For more, see the original article at the link below.
iPhone 5 Tips and Tricks | Apple