My wide-angle lens was perfect when the late-evening shadows crept across the mountains of the Arctic National Wildlife Refuge. The sweeping landscape, wide open and treeless, was suited to the wide field of view. Until, that is, the weather turned, and with it, my perspective on that wild place. I woke one morning to rain pattering intermittently on the nylon of my tent. Between showers, I emerged to find the mountains obscured by scudding clouds.