Comparison of magnitudes of PNe measured with the Subaru SuprimeCam and the PN.S. The colour-coding is the same as in Fig. 1. The grey shaded region indicates where 99% of Subaru sources would fall if two independent measurements of their magnitudes m_AB, Subaru were plotted against each other. The error bar in the lower right corner denotes the typical measurement error for magnitudes measured with the PN.S.