Previous determinations of the passband functions were based on the reduced results of the Geneva photometric system as available in the published catalogs. Initially the Geneva system was defined as a natural (i.e. without normalization to zero for a given spectral type) extra-atmospheric system. In some cases, however, we need the reduction coefficients for transformation of colors to the primeval system. In practice, the observations obtained during a night are reduced in two steps: (1) elimination of the atmospheric effects and (2) reduction to the original system to ensure its stability and homogeneity during many decades, even made with different photometric equipment. Since the first years of application of the Geneva photometric system, both devices and reduction procedures have been improved, and it seems preferable to use the passbands derived from recent measurements reduced to outside the atmosphere (the first step only). Then the linear relations can be used to obtain magnitudes and color indices comparable to those in the published catalogs.