Cumulative luminosity function (LF) within a radius of 0.8 Mpc (left) and r_vir = 1.7 Mpc (right). The solid line corresponds to our galaxy counts, and the big open circles are sparsely sampled points from the Kodama et al. (2004) LF. The dotted-dashed line in the right plot corresponds to our LF corrected for the incomplete area coverage within r_vir. The dashed line corresponds to the completeness limit of our data, log  L(Hα+[N ii]) ≃ 41.