One of the minor problems in shooting stereo with any stereo utilizing two separate images is that the lighting frequently changes between the first and second pictures. Also, closeup and macro pictures are more difficult in my opinion.

One solution to these problems is to store the picture as a split image on a single frame. The best way to do this is with a frontsurface mirror. My first attempt worked but wasn't adaptable and I like to be able to use different cameas and different configurations in some of my picture taking. The first splitter:

I made a fine adjustment using a screw and spring arrangement. In the second version I dropped that idea as being of little value.

In this incarnation I modified the mirror mount bar to be longer; also the mirror can be mounted with its major axis either vertical or horizontal. I also made the mirror removable/replaceable by glueing a washer to the back and using a magnet from an old disk drive to attach it firmly in place on the mounting board. A couple of pictures follow:

Here's pictures of its use on two different cameras.

And a picture of some African violets taken with the splitter and displayed here for parallel viewing on a computer screen.