1. A device for stereophotogrammetry comprising a camera body ( 1 ) and a double-optics ( 2 ) comprising two sub-optics ( 2 b ) and ( 2 c ), configured for a simultaneous acquisition of two views according to two different angles, wherein the device is comprising a positioning system ( 34 ) configured to define a position of a target subject (S) for one of at least two distinct pre-defined point positions (A 3 , A 4 ) of the target subject (S) relative to the stereophotogrammetry device, the at least two distinct predefined point positions comprising a closer point position (A 4 ) and a farther point position (A 3 ), the closer point position (A 4 ) being closer to the stereophotogrammetry device than the farther point position (A 3 ), and wherein the positioning system ( 34 ) is comprising at least two pairs of light beamers ( 3 b , 3 c ) and ( 4 b , 4 c ) where a first pair of light beamers ( 3 b , 3 c ) is converging to the farther point position (A 3 ) and a second pair of light beamers ( 4 b , 4 c ) is converging to the closer point position (A 4 ), and wherein the device comprises a switch ( 5 ) comprising a first selection position configured to select the farther point position (A 3 ) and a second selection position configured to select the closer point position (A 4 ), wherein the switch ( 5 ) is configured to switch on the first pair of light beamers ( 3 b , 3 c ) in the first selection position and wherein the switch ( 5 ) is configured to switch on the second pair of light beamers ( 4 b , 4 c ) in the second selection position.