On the other hand, in the Jordan frame, all the matter fields ψ ψ m are coupled minimally to g ~ ~ μ μ ν ν and isolated test particles will move on geodesics with respect to the metric g ~ ~ μ μ ν ν . This means that if we were to reconstruct the Riemann curvature tensor by measurements of geodesic deviation, we would in fact obtain the curvature tensor in the Jordan frame. When, on the other hand, we deduce on the presence of matter sources from gravitational lensing from the usual relativistic theory, we obtain the distribution of the matter sources in the sense of the Einstein frame.