Observed Hα luminosity function at z ~ 0.62. We represent the LF corrected for incompleteness in black filled circles with the best linear fit as a red solid line. The open symbols indicate the LF values before applying this correction with the best linear fit as a black solid line. We also include as a reference the LF at z ~ 0 from Gallego et al. (1995) (black dotted line) and the observed LF at z ~ 0.84 from Villar et al. (2008) (black dashed line).