The Lullwater from Nethermead Circuit, Prospect Park, stereoscopic view (courtesy Miriam and Ira D. Wallach Division of Art, Prints and Photographs: Photography Collection, The New York Public Library ...

Editor’s Note: If you download this image for your left eye and this image for your right eye and do the cross-eyed thing you will see a stereoscopic image of the summit of Mt. Everest – from orbit.

I often get excited about testing a product because I know it’s going to be a joy to use. Other times, it’s because I’ve never held the device before or there is a new feature worth checking out. Then ...