The DxO ONE [B&H|Amazon] is a great idea, and a real alternative to the Olympus Air A01 [B&H | Amazon] and Sony [B&H|Amazon]: pump up the iPhone with a superior sensor while minimizing added bulk. Indeed, the DxO ONE is much smaller than either the Air 01 or QX series, and with a direct lightning connection, much faster to display.
You could argue that it runs truer to what makes the iPhone so compelling...
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