As a high school shop project I built a bracket to attach to my camera for taking 3D photos. If there is any interest, I will add a photo of the bracket and a description of its use.
Here are a few photos I took using the bracket.
Each photo was taking as a double exposure on a Nikon-FM. The first exposure was taken through a red filter, while the second was taken through a blue filter from a slightly different position. You will need a pair of Red/Blue 3D-glasses to view the effect.