Here is some basic info to get you started. In this online tutorial for the alignment of two cameras attached to a mirror rig, Florian Schäfer explains the usage of the newly developed 3D Calibration Test Chart. See how to calibrate your 3D Stereo Rig quickly and easily. The 3D Test Chart used in the tutorial is printed on mat, non-reflecting and weather resistant laminate. It can be used for all kinds of mirror rigs and is available from P+S TECHNIK.