The right and left view have opposite polarity. The picture is projected through one pair of polarized filters. The most common colors used are Red/Cyan, Green/Magenta, and Blue/Yellow Polarized glasses: Polarized systems use two sets of polarized light filters. These glasses use a colored gels to selectively filter out the opposite color image. Color filtering glasses: The picture is displayed in two colors (one for each view). The observer wears glasses that filter the image so that each eye sees only the appropriate view. 3D viewing systems with glasses: These systems superimpose the right and left views on the screen. There are many different ways to display and view a stereoscopic 3D image. This lets you capture both views with a single camera. This rig uses mirrors to split the image and space each part at the appropriate distance. If you don't have two cameras, you can construct a mirror splitter like this one by user courtervideo. Then when taking the picture, you need to activate both cameras at the same time. To see a good example, check out this rig by user ciscu92.
In this kind of setup, the cameras are mounted 2.5 inches apart from center to center. If you have two cameras, then you can construct a simple two camera rig that mounts onto your tripod. But if you want to capture 3D images of moving objects, then you will need some additional hardware. This method works great for subjects that are still. Then take a second picture from the new position. This should only be necessary for close up shots. If necessary adjust the direction of your camera so that the subject is again in center of the shot.
Then slide the tripod 2.5 inches (about 63 mm) to either the right or the left. Compose your shot with the main subject in the center and take a picture. Set up your camera and tripod on a level surface.
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