Though it's an attractive case on its own, Griffin's new Clarifi ($35) has one feature that sets it apart from all other iPhone 3G cases out there: a sliding macro lens that can be flipped into position to help the camera take clearer close-up pictures. Though the lens doesn't perform magic and suddenly improve the iPhone's color rendition, it does certainly improve the device's ability to focus on nearby subjects, producing finer detail within the…
