Sure, we tested the iPhone 5's camera in the well-lit streets of New York City, but if you're wondering how Apple's latest functions when used primarily as a shooter, TREK has a pretty remarkable look. Photog Austin Mann and a few of his closest pals took a pair of iPhone 5s to Iceland following launch weekend in a bid to test the unit's durability, capability and image quality next to the 4S. After two days of geyser spray and admitted "drops in mud," the uncov