Layout of the present 85-electrode monomorph DM and 85 subaperture WFS of the present AO system of the SST. The gray or white radial/azimuthal structures correspond to the electrodes of the DM and the hexagonal structures correspond to the 85 lenslets. The four lenslets indicated with small red circles correspond to the subapertures used for seeing measurements. The large red circle corresponds to the pupil diameter. For details, see text.