The easiest way to capture mountaintop views for posterity is to use a handy, low-cost panoramic app for Apple and Android phones. For instance, DMD Panorama—a newcomer in this area—creates 360-degee panoramas in about 20 seconds. It’s one of the quickest, easiest apps of its kind thanks to a scheme in which you stitch the image together by lining up two onscreen icons. The app comes in iPhone ($1.99) and Android (free) flavors.
Panoramic apps are a back-to-the-future technology—one of the earliest panoramic cameras, the Kodak Panoram, also shot ultra-wide-screen images by physically swinging the lens with a steel spring. With modern phone apps, you act as the swinging lens.