Luminosity function of 47 Tuc. (a) m_F322W2 versus m_F150W2 − m_F322W2 CMD for our selected sample of stars. The two green lines are used to isolate the 47 Tuc MS stars. Sources between the two green lines are represented in black, while other stars are represented in grey. (b) Number counts of stars (in black), binned into 0.5 m_F322W2 magnitude intervals, corresponding to the black points in (a). The red line shows the completeness as a function of magnitude, with values reported at the top of the plot. The completeness-corrected LF is represented in blue.