Emission dates of photons at the footpoint of null geodesics connected to the observer’s screen, plotted with the same color scale for an inclination of 5° (left) and 85° (right). The grid of emission positions is projected onto the plane of the accretion disk. The color bar is expressed in units of the ISCO orbital time t_ISCO. The lensing effect of the black hole is clear for an inclination of 85° on the right panel, leading to a higher concentration of emission points on the side of the black hole opposite to the observer.