Stereoscopic Viewer

A Makerbot Giveaway entry.

This is a stereoscope used for viewing stereo pairs (two images that together make a 3D image) arranged parallel style (not cross-eye). Thanks to its central pivot, it can be used with a wide variety of image sizes. It's ideal for viewing pairs made of two 5x7" photo prints, or images approximately that size on a monitor. It's also fun to just plain look through the viewer, because it increases your depth perception by effectively moving your eyes farther apart.