HeavyMath StereoPic is the easiest and cheapest way to take anaglyph stereo pictures.
Traditionally, to make a anaglyph photo, two cameras are mounted on
special rack and two photos are taken. Anaglyph photo merging software
is then used to combine the two photos together. Since there is no way
to check the stereo look until the final merging, serious problem could
occur. If one photo is out of focus, if the two cameras are set to
different focal leng.gifth, or if the two cameras are mis-aligned, the
photos won't be usable.