Design, manufactoring and testing of a ball-head support for thermal vacuum chamber applications. The purpose of this paper is to explain the process of the realization of a MGSE for the new photogrammetry system that has been developed at the ESTEC Test Centre. This hardware, employed to measure the thermo-elastic deformations, has been recently successfully qualified for thermal vacuum operations. The eight cameras must be used in several thermal vacuum chambers, at ESTEC but not limited to. The MGSE most crucial component is the spherical joint, that will need to be still and fixed once inserted in the thermal vacuum chamber, in order to allow the test; but able to move and allow a change on the field of view of the camera once the test is completed, for several cycles of testing.