Dramatic differences between the estimated deconvolved sky when using three different modified CLEAN algorithms on a simulated dataset containing 100 sources. The visibilities have been generated by taking (i) the individual antennas; (ii) their projection on the sky and (iii) the beam-forming step (the scalar array factor) into account. The top-left image shows the deconvolved sky as estimated with a traditional imager not taking time, frequency, baseline, direction-dependent effects into account. The top right and lower left images have been generated by considering, respectively, the array factor only and both the array factor and the element beam. The lower right panel shows that the input flux densities are correctly recovered.