There are terms in this post that you may not understand. Please refer to this page for any definitions you may be unsure of: http://jamesgodfrey3dstudy.blogspot.co.nz/2015/12/some-key-terms-and-phrases.html
Ortho, Hypo, and Hyper stereoscopy
With the interocular distance being about 65mm on average for an adult, most stereographers use this as a stereo-base. When the the interocular and interaxial distances are the same, then you are shooting in ‘Ortho-stereo’.
If the interaxial distance used in smaller that this you then shoot in ‘Hypo-stereo’. This technique is common for theatrically released films to accommodate the effects of the big screen. It is also used for macro stereoscopic photography.
Lastly ‘Hyper-stereo’ refers to interaxial distances greater than 65mm. The greater the I.O. the greater the depth. The only potential issue with this is that gigantic real life objects may appear as if they were small models.
Decreasing the interaxial separation between two cameras to 30(ish)mm or less will allow you to shoot amazing macro stereo-photos and separating the cameras to a meter or so apart will allow great depth on mountain ranges, city skylines and other vistas.
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