This picture shows an ideal setting of both cameras. In ideal case the following equations are applied:

 p = a

The distance between both cameras lenses should be the same as by spectators eyes. However this condition is realy hard to achieve because of cameras construction varius cables around etc. In praxis will be this distance bigger. This setting affects mostly the depth of the displayed space reception.

 alpha = beta

The viewing angle of the camera must be same as the spectators one. The viewing angle may be set by zooming of the camera. There is necessary to set the same zoom levels on both cameras. The best way how to do it is to set the zoom level to widest possible view.

 f / l = w / s = 2d / p

This equation should apply as well.

However whole cameras setting may be done ad hoc according to spectators subjective view. Practicaly we are able to achieve good stereoscopic image without any computations just by trying the best settings.

There are several other pre-requisities to get a good stereoscopic image.

Both cameras must be set in one plane.

Both cameras must be focused on the same object in the scene. It depends on the camera what focussing is better. The automatical focussing shouldn't be any problem generally.

We use a Paralax setting device by Apec to set up both cameras.

Some pictures from our testing.