Comparison of axis-ratio measurements from VLT/HAWK-I and HST/WFC3 imaging as a function of redshift. The difference in axis-ratio measurements, q _HAWK-I − q _WFC3, has been multiplied by the total K-band flux in units of the K-band flux for a K = 21 object, such that variations in magnitude and their effect on the measurement uncertainty are accounted for. For galaxies in the narrow magnitude range (here, 20 < K < 22), there is no systematic redshift dependence; the uncertainty for galaxies at 0.5 < z < 1.0 is comparable to the uncertainty for galaxies at z > 1. The trends shown in Figure 2 and this figure imply that the accuracy of our axis-ratio measurements is 10% or better for all galaxies in our sample.