Dust effects (corr^{dust,   B/D}) on the derived bulge-to-disk ratios, B/D. The effects are represented as differences between the apparent B/D of decomposed disks and bulges as those of single disks and bulges. Two variable Sérsic index functions were used for image decomposition. The black curves are plotted for , while the other curves correspond to (green), 4.0 (red) and 8.0 (blue).