a) Anisotropy of the lensing signal in the simulations in the presence of additional foreground galaxies that lens both the lenses and the sources. In the top panel, we show (f − f₄₅) and f with the filled black and open green diamonds, computed with the exponent in the weight α = 1.0. In the lower panel, we show (f_mm) with the filled black diamonds (open green diamonds). The dashed lines show the signal in the absence of multiple deflections. The uncorrected shear estimators f and f_mm are increasingly reduced for larger distances to the lens. The reduction of the systematic shear corrected estimators is clearly smaller on scales < 100 arcsec, but the difference decreases at larger separations as the systematic shear is not constant anymore and the correction therefore inaccurate. b) Anisotropy of the lensing signal in the simulations in the presence of additional foreground galaxies, excluding lens galaxies with e < 0.05 from the analysis. The exclusion of round lenses is found to reduce the impact of multiple deflections, particularly for f_mm and as these measurements are not weighed with the lens ellipticity.