Here are four tricks picture with iPhone1. Snap a photo with headphonesIOS 5 introduces the convenience snapped photos using the volume button up. With this feature, users can plug his headphone and wear it as 'a remote camera shutter.'This action allows the image to the more stable and flexible. With the option to put the iPhone on a tripod and use headphones to enable the shutter, photographing action would be more fun.2. Key focus and exposureIf...