Left: B‐band Tully‐Fisher relation. Right: K‐band Tully‐Fisher relation. Late‐type galaxies are indicated by spirals. Early types are indicated by circles (dEs) and pentagons (Es). The adopted mean uncertainty on the luminosities is indicated with a vertical error bar. The origin of the data is indicated in the figures (with spiral = TP00+C00+M05+G06). In the right panel, only the TP00 data set, being the only late‐type data set giving K‐band luminosities, is included.