Average gain in sensitivity in speckle-subtracted images as a function of time between the sequences where the fast internal turbulence has been subtracted and the original ones. The gain in contrast is averaged between 10 and 15 λ/D. The raw data are displayed in lighter colors, while the low-order polynomial fits are displayed in bright colors to improve readability. The gain in contrast is always greater than unity, which means that the sensitivity is always better in the turbulence-subtracted sequences.