Resulting S/N obtained after observation of a planet in a system with different exozodi dust levels. All four plots are obtained with 10 hours of integration time and for observation of a planet in the farthest stellar association η Chamaeleontis. Plots (a) and (b) are observations for a moderate temperature case, 700 K, (c) and (d) are for a 1500 K scenario. For each temperature case, the first plot is for a planet orbiting a Sun-like star at 1 AU, the second is for an M-dwarf at 0.13 AU. The red vertical lines indicate the distances of β Pictoris, TW Hydrae, and η Chamaeleontis, respectively.