Apple unveiled its new iOS 5 at the Worldwide Developers Conference 2011 today, which includes some notable upgrades to the camera functionality on the iPhone. First off, the volume up button now doubles as a shutter button, allowing the phone to be used more easily in a camera orientation. There’s also a new camera button on the phone’s unlock screen, letting you quickly switch to the app before a precious moment slips away. Finally, a AE/AF lock feature will allow you to tap any area on the screen to quickly determine the appropriate focus and exposure for that point.