The granulation brightnesses and convective velocities in the solar photosphere between the levels of formation of the continuum radiation and the temperature minimum are examined. The spectral images of the granulation observed in the iron lines were obtained using the 70-cm German Vacuum Tower Telescope (VTT) at the Observatorio del Teide on Tenerife (Spain). It is shown that the convective structures change not only the sign of relative contrast, but also the direction of the motion during theirs motions up and down through out the solar photosphere. The heights of intensity contrast reversal and velocity sign reversal strongly depend on the convective velocity and intensity measured in the continuum. On the average, the velocity sign reversal takes place at the height 240±130 km and intensity contrast reversal occurs at the height 200±65 km.