On-sky PN distribution for the PN density and PNLF calculation in M 105. Only PNe from the imaging survey and to the right of the blue lines are considered (see text) to limit the contamination from NGC 3384 PNe. The PN density of M 105 is calculated in nine elliptical bins denoted in grey. The dashed line indicates the photometric major axis of M 105. The red contour corresponds to the vertical dashed line in Fig. 9. The black cross denotes the centre of NGC 3384. PNe within 0.5 mag from the PNLF bright cut-off at the distance of M 105 are marked with red crosses. North is up, and east is to the left.