Red/blue composite image viewable with red/blue 3D glasses ("anaglyph").These are slightly easier to view than a cross focus image pair, but they don't reproduce any colors in the 3D image.
However, this is also the most difficult and unnatural viewing technique to master. When done correctly, each image appears as a double, but one image double from each original photo overlaps to form a central 3D image. This just requires placing each image side by side, and viewing these out of focus.
STAGE 2: HOW TO CREATE THE 3D ANIMATED GIF IMAGE Regardless, it's also a good idea to take more than two photographs so you can experiment with how larger/smaller displacements appear on your home computer screen.
In extreme cases though, too little displacement can eliminate the 3D effect, while too much can make the animation appear as two different 2D images. Luckily you don't have to get it spot on. Often the easiest way to determine the displacement distance is to just move your camera back and forth until you're happy with the movement you're seeing in the viewfinder/LCD. Closer subjects require less displacement, so in practice the displacement may not need to change much for wide angle vs telephoto lenses. Keep in mind that wide angle photographs are typically taken much closer to the subject (see " using wide angle lenses").