Comparison of F&F convergence behaviour between MITHIC laboratory data and equivalent simulations (see Table 1, row 1 for details). Left: high-resolution, high-S/N MITHIC focal-plane images (top) andcorresponding residual wavefront error maps (bottom), before and after F&F correction (first and second columns respectively). High-frequency residuals visible in the final wavefront error map are dominated by fitting error enforced by the DM-like filtering of wavefront corrections. Right: plot of estimated image Strehl ratio as a function of closed-loop iteration number, showing close agreement between a single convergence of MITHIC data (red) and an average of ten simulations (blue), with shading denoting the 1σ limit. The two inset images show the N = 0 and N = 25 DTTS-like input focal-plane images provided for F&F for wavefront reconstruction.