by kongorilla, published
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.
But that's only half the fun. I've included a collection of stereo images I made especially for this viewer (see "Kongoscope_3D_Image_Funpack.pdf").
They're good viewing on your monitor or printed on 8.5 x 11" paper.
But that's not all! I wrote a light-hearted user manual (see "Kongoscope_USER_MANUAL.pdf") that should make assembly easy and fun. It also has viewing tips. While writing the manual, I made up a fantasy company, KONGO!, that's marketing this device. See their comic book advertising over there on the left.
I hope somebody has fun with this!
EDIT OCT. 6, 2010: By request, I've added the original Blender file. Note that there are reference objects in the file not meant to be printed, like mirrors and screws.
All the instructions you need can be found in the file Kongoscope_USER_MANUAL.pdf. It also contains the parts list and a fair amount of goofiness.
Here are a couple sources for the mirror you will need:
If anyone knows of other retailers of reasonably prices first surface mirror, please add links below! Thanks!