Aperture mass for the main subhalo in field 1 for five different radii: 19, 38, 75, 150, and 300 h^-1 kpc or 6′′, 12′′, 24′′, 48′′, and 1.6′. The blue circles indicate the masses computed on the shear only reconstructions while the red triangles indicate the masses computed on the combined shear and flexion reconstructions. Error bars represent the standard deviation of 100 independent realisations.