Scaling of the deflection-angle maps with eccentricity. Left panel: Position of deflection-angle maximum x_2max (dashed line) and position of saddle point x_1sad (solid line) as a function of eccentricity e (non-linear top axis) and ellipticity $1-\sqrt{1-e^2}$ (linear bottom axis). Right panel: Deflection-angle amplitudes |α₀| at these positions in units of convergence parameter κ_s as a function of eccentricity and ellipticity.