Information content for characterizing t_E (left) and q (right) is shown for an unblended q = 10^-4 light curve with known parameters. Each of the color-coded points corresponds to a potential planet and its maximum contribution for the given sampling (cf. Fig. 4). The mass ratio is optimally characterized by exactly following the detection zone area, while the Einstein time t_E could benefit from more observations in the wings. For 1% photometric accuracy, the color-coded logarithmic sensitivity just needs to exceed one in order to ensure 10% accuracy in each parameter. Since information is additive, one can estimate the number of required points.