Halo-center details of the lens-plane maps from Fig. 4, with the same color bars and additional shear contours in the first and third rows. In the maps of the shear on the third row: the central dot in the first panel corresponds to γ = κ_s; due to the very low shear variation in the first panel the dotted γ = 0.9 κ_s contour is added in all three panels; the cyan dots in the second and third panels mark the positions of the zero-shear points. Remaining notation as in Fig. 4.