We see in 3D because of the separation of our eyes, and a global cultural process that from birth has told us what is close and what is far, and how much far away. This skill we have achieved through a trial/error process when we were kids, and through observation while growing up.
Moreover: the average distance of the person's eyes (Interpupillary Distance - IPD) goes from 52mm to 76 mm (Wikipedia reference). A little more or less makes no difference, because the brain will compensate and enhance the information it will receive.
There are several ways to achieve the 3D effect with your camera(s).
Anaglyph, red/cyan glasses is, in some way, the fastest and cheapest, but a the very imperfect method:
Ghosting can be better explained as "a double image that is perceived, and not really seen" that makes the viewing kind of a strain on the couple eyes/brain.
Avoiding ghosting is almost impossible.
But what can be done is:
To make the best 3D pictures (hey, I'm giving my tricks away!) we have to exaggerate the 3D information we provide to the brain, but not too much, or it won't be able to resolve the image.
Too much confusion = no 3D effect and little clarity of the image itself.
An average 3D Slide Rig needs to have:
As for potential results, please, check out my pictures on these galleries, almost all of them have been taken with more or less these parameters, and start evaluating the possibilities ...