1. A method for generating a stereoscopic image, comprising the following steps: get a stereoscopic shooting module consisting of a pair of imaging devices; determine the current values of focal length and image sensor's width set on first and second imaging device; determine the distance value between the shooting module and a distant subject matter chosen in the current scene to picture; choose a wished maximum horizontal offset value that shall be performed about that distant subject matter into the resulting stereoscopic image; determine the distance value between a wished convergence plane and the shooting module; determine at least one interaxial value, proper to define an interaxial positioning to be set on first and second imaging device, and at least one convergence value, proper to define a converging angular positioning to be set on first and second imaging device, from these said current values of focal length and image sensor's width, said distance value between the shooting module and the chosen distant subject matter said wished maximum horizontal offset value, said distance value between the wished convergence plane and the shooting module, set the said interaxial value(s) and the said convergence value(s) on first and second imaging device; then perform a synchronized imaging capture with first and second imaging device.