Convergence power spectrum for sources at redshifts z_s = 0.6,1, and 1.5. The points are the results from numerical simulations with 3-σ error bars. The low black dashed line “L” is the linear power, the middle blue dot-dashed line “S” is the result from the “halo-fit” of Smith et al. (2003), and the upper red solid line “comb.” is the result from our model, which combines 1-loop perturbation theory with a halo model. The vertical arrow close to the peak shows the scale up to which the simulation result is valid within 5%.