How to use the camera flash on the iPhone 4
Not only does the new iPhone 4 have two cameras, but the one which should be thought of as the “main” camera has a flash! Read the rest of the post to find out how to control it and how well it works. The flash function [...]
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http://iphonetouch.blorge.com/2010/08/04/how-to-use-the-camera-flash-on-the-iphone-4/