  When the logarithmic slope of the galaxy counts is lower than 0.4 (this is
the case in all filters at high magnitude), the magnification bias due to the
lens makes the number density of objects decrease. Consequently, the radial
distribution shows a typical depletion curve. We present simulations of
depletion curves obtained for a variety of different lens models and we show
how the model parameters affect the depletion area.
